TalesinOur own little well of hateJoin Date: 2002-11-08Member: 7710NS1 Playtester, Forum Moderators
<!--quoteo(post=1655491:date=Oct 11 2007, 09:44 PM:name=Zig)--><div class='quotetop'>QUOTE(Zig @ Oct 11 2007, 09:44 PM) <a href="index.php?act=findpost&pid=1655491"><{POST_SNAPBACK}></a></div><div class='quotemain'><!--quotec-->Acquiring this Z tomorrow. Took a video of it two weeks ago.
<a href="http://media.putfile.com/240Z-350SBC" target="_blank">http://media.putfile.com/240Z-350SBC</a><!--QuoteEnd--></div><!--QuoteEEnd--> Your video has successfully given me a card-on, Zig. Looks absolutely awesome.
Thoughts: -Could drop the weight even further by going with a CF hood, and painting it to match the car when (if?) you get the whole thing done. -DOT regulation states that the exhaust on a street-legal vehicle has to exit after the B-pillar. Give some consideration to picking up a pair of 90-degree Mandrel bends and a couple of shorty Magnaflows.. might have room that way, given that you apparently don't have a back seat to worry about anyway. -As an extension of the above, some Japanese manufacturer (Apex`i I think) makes a cable-actuated exhaust butterfly system. They're designed to where you simply unbolt a section of the exhaust, wedge the piping on either side the half-inch either way that the new bit needs, and put the bolts through. Then run the cable into the cabin, allowing you to close the butterfly while driving to quiet things down. Have a buddy with a built Cobra running a pair of these on his side-exit exhausts, and they make a HUGE difference. Backpressure kills a lot of the power, but it's perfectly drivable. Keeps his tucked away, and shuts the butterflies whenever he sees a cop. -Consider a scoop to curve over that filter, would get <b>proper</b> ram-air that way (though you might need to build a 'cup' box to seal to the underside of the hood for maximum effect), instead of simply being cold air.
Zig...I am Captain Planet!Join Date: 2002-10-23Member: 1576Members
CF hood? Ehhhh.... idgaf about weight. The street weight of this car is going to be like 2800 tops.. and I'm not going to track it at all. So w/e. I'm on a tight budget with this car, too.. so that kind of schmancy stuff is out, for now at least <img src="style_emoticons/<#EMO_DIR#>/tounge.gif" style="vertical-align:middle" emoid=":p" border="0" alt="tounge.gif" />
What I'm doing as far as exhaust... I have to get a smaller fuel cell, as the 22gal takes up the entire rear of the car. I'll get a narrower 15/16/17gal or something, and run two Magnaflows, one on either side of the fuel cell, sitting vertically. It'll probably still be loud as sh*... but at least I won't get like, instantly ticketed for noise pollution. Maybe.
Exhaust cutouts are cool but I can only afford a butterfly nut cutout, and I'm pretty lazy and wouldn't want to have to unscrew it every time either. So I'm just going with straight piping and magnaflows (or ######s, those are rated really well for smallblock applications) for the same power and a tolerable noise level.
I plan to bolt a cowl down over that hole.. probably cut the hole out to fit the cowl. People have been really successful with cowl induction in V8 Zs. Probably just work on a mild undertray, and sealing up the mouth of the airdam and hood, so that the air coming into the grille definitely moves through the engine bay and through the filter.
This'll be quite an effort to make right for the street.... I'm going to strip out the entire interior, to the firewall, and coat it down with herculiner or something, and then lay it over with eDead sound deadener. That should make things a little cozier in there too. Then there's laying down carpet, putting stock Z doors back on it, etc.. haha.
TalesinOur own little well of hateJoin Date: 2002-11-08Member: 7710NS1 Playtester, Forum Moderators
edited November 2007
The less weight you're carrying around, the faster and more responsive the vehicle will be. Only reason I was suggesting that, as with that light of a car already, the savings would likely make a markedly noticeable difference. Also, if your corner weights show you as being front-heavy (very likely with that V8 in there) it'll help to even out the balance of the car, again improving handling quite a bit. Just moving my battery to the trunk on my own car (significantly heavier!) made a very noticeable difference in its ability to turn in, as well as hold an aggressive line while cornering.
The ones I'm talking about aren't cutouts, they're in-line butterflies to restrict the exhaust path and quieten things down. You don't even unscrew them, just leave them in-line and fully open when you want no restriction, and for around-town driving close them (via the cable) so police won't glare at you QUITE as much, trading off a good bit of power loss for fewer noise tickets. Exhaust cutouts are illegal in CA, and can lead to the car being impounded on the spot if an officer catches you with one on the street.
I'd recommend against allowing airflow down into the engine bay via the hood hole; it'll make negligible difference to underhood temps, while at the same time screwing up the vacuum under the car at-speed. A tray under the air filter out and around the hole, with some (foam?) rubber weatherstripping would make sure the tray seals to the underside of the hood, that all that air went straight into the filter, and at a bit of positive pressure to boot when at freeway speeds. I'd also recommend putting on some kind of screen... known a few STIs who have managed to suck birds into their hood scoop, and end up with a mangled (and well-cooked) mess all over their intercooler. Would be even worse with just a paper filter there before your carb.
Zig...I am Captain Planet!Join Date: 2002-10-23Member: 1576Members
<!--quoteo(post=1659516:date=Nov 6 2007, 03:17 AM:name=Talesin)--><div class='quotetop'>QUOTE(Talesin @ Nov 6 2007, 03:17 AM) <a href="index.php?act=findpost&pid=1659516"><{POST_SNAPBACK}></a></div><div class='quotemain'><!--quotec-->The less weight you're carrying around, the faster and more responsive the vehicle will be. Only reason I was suggesting that, as with that light of a car already, the savings would likely make a markedly noticeable difference. Also, if your corner weights show you as being front-heavy (very likely with that V8 in there) it'll help to even out the balance of the car, again improving handling quite a bit. Just moving my battery to the trunk on my own car (significantly heavier!) made a very noticeable difference in its ability to turn in, as well as hold an aggressive line while cornering.
The ones I'm talking about aren't cutouts, they're in-line butterflies to restrict the exhaust path and quieten things down. You don't even unscrew them, just leave them in-line and fully open when you want no restriction, and for around-town driving close them (via the cable) so police won't glare at you QUITE as much, trading off a good bit of power loss for fewer noise tickets. Exhaust cutouts are illegal in CA, and can lead to the car being impounded on the spot if an officer catches you with one on the street.
I'd recommend against allowing airflow down into the engine bay via the hood hole; it'll make negligible difference to underhood temps, while at the same time screwing up the vacuum under the car at-speed. A tray under the air filter out and around the hole, with some (foam?) rubber weatherstripping would make sure the tray seals to the underside of the hood, that all that air went straight into the filter, and at a bit of positive pressure to boot when at freeway speeds. I'd also recommend putting on some kind of screen... known a few STIs who have managed to suck birds into their hood scoop, and end up with a mangled (and well-cooked) mess all over their intercooler. Would be even worse with just a paper filter there before your carb.<!--QuoteEnd--></div><!--QuoteEEnd-->
Yeah, I know what you're saying. The car currently sits about 51/49 front and rear. The battery is definitely going in the back (it's sitting where the passenger seat is going in..)
I see what you're saying about the in-line butterflies... but honestly, I don't want to get that complicated if I can just do a one-off, straight-through performance exhaust that still stays pretty quiet with the magnaflows. It should be... bearable. And the pigs will profile and pull over a tuner car for their exhaust noise, rather than a classic, every time.
I'm not putting a scoop on the hood. I'm putting a cowl on it. Ideally something like either of these. <img src="http://img216.imageshack.us/img216/5434/zcowlgw4.jpg" border="0" class="linked-image" /> <img src="http://memimage.cardomain.net/member_images/1/web/685000-685999/685533_122.jpg" border="0" class="linked-image" /> Cowl induction is for letting air out, not taking it in like a scoop. In some cars, air flow creates a high-pressure area in the engine bay (the Z is an example), and the cowl lets it escape out the back. Pretty common on HybridZ (where I do all my planning/scheming/dreaming/wishing/hoping)
TalesinOur own little well of hateJoin Date: 2002-11-08Member: 7710NS1 Playtester, Forum Moderators
Quite the opposite, actually. Given the aerodynamics involved, and the restriction of the radiator on the front bumper intake area, those actually pull air IN, forcing it to do a quick 180 and increasing drag dramatically compared to a stock setup or simple scoop. The bend where the hood transitions to the windshield is one of the highest-pressure areas on the car, aside from the peak of the front bumper. If you want to test this, simply tuft the car... use tape to affix short bits of frayed-out yarn every few inches. Where the airflow is unified, the tufts will stay plastered down nicely... turbulent areas will whip the cotton around. A scoop and box would provide the best intake flow characteristics, providing the maximum airflow.. again, at positive pressure rather than an arrested eddy flow as with the hoods you've shown in those pictures. That's why I laugh every time I see people spacing out the trailing edge of their bumper to 'exhaust' the engine bay air.. it actually sucks air in instead, leading them to incorrectly assume that the engine bay air is being pulled through and out over the top of the car.
And police tend to pop modified 'imports', regardless of age. Mustangs can get away with a hell of a lot more than a Datsun or DSM.
Zig...I am Captain Planet!Join Date: 2002-10-23Member: 1576Members
<!--quoteo(post=1659667:date=Nov 7 2007, 12:58 AM:name=Talesin)--><div class='quotetop'>QUOTE(Talesin @ Nov 7 2007, 12:58 AM) <a href="index.php?act=findpost&pid=1659667"><{POST_SNAPBACK}></a></div><div class='quotemain'><!--quotec-->Quite the opposite, actually. Given the aerodynamics involved, and the restriction of the radiator on the front bumper intake area, those actually pull air IN, forcing it to do a quick 180 and increasing drag dramatically compared to a stock setup or simple scoop. The bend where the hood transitions to the windshield is one of the highest-pressure areas on the car, aside from the peak of the front bumper. If you want to test this, simply tuft the car... use tape to affix short bits of frayed-out yarn every few inches. Where the airflow is unified, the tufts will stay plastered down nicely... turbulent areas will whip the cotton around.<!--QuoteEnd--></div><!--QuoteEEnd-->I dunno, then. I mean, I understand what you're saying, but it's almost a universally accepted fix for that problem.. similar to propping the hood up at the back to leave a gap, which a lot of people do as well. To the point that people have observed freeway temps to drop 20-30 degrees. What do you think? Also, the cowl obviously makes room for the air cleaner.
Don't you think there's a chance that maybe all these guys are doing it right? I'm inclined to trust prior experience rather than go off and do my own thing and not know what the hell I'm doing.
<!--quoteo--><div class='quotetop'>QUOTE</div><div class='quotemain'><!--quotec-->And police tend to pop modified 'imports', regardless of age. Mustangs can get away with a hell of a lot more than a Datsun or DSM.<!--QuoteEnd--></div><!--QuoteEEnd-->Well it won't look like a ricer when I'm done with it.. might even sell the cobra replicas and go with some nice deep polished centerlines. All the chrome will be clean, replaced maybe. I'll probably mount chrome bullet mirrors on the front fenders, too. Etc.
So when the cops are driving next to me they'll hear an audially pleasing, low, classic muscle idle. Instead of a 1.6L N/A fart-can retard howl. And when they look over they'll see a '73 with a nice gloss black paint job with tasteful chrome accents (decided on gloss black.), instead of a hideous '92 Toyota amalgamation of factory teal and primered aero kit parts.
TalesinOur own little well of hateJoin Date: 2002-11-08Member: 7710NS1 Playtester, Forum Moderators
Again, the underhood temps drop not because air is being exhausted, but rather that air is being pulled in from that high pressure gap. One of my favorite sayings is 'Just because it runs <i>at all</i> doesn't mean it's running <b>right</b>'. Sure, it works. It also screws up the vacuum under the car, providing more high-speed instability. Tuft the car, see what the air is actually doing. Ten bucks says the cowl is sucking cool air in backward to drop the temps, not acting to exhaust it. I mean, think about it. They put the vent intakes there. It pushes air INTO the cabin (a static high-pressure bubble), it doesn't suck air out of the cabin. Same thing with the shimmed/cowled hood, just into the engine bay which is a non-static (AND lower pressure) area. You would get more of the SAME cooling effect by shimming the FRONT of the hood. In either case, a scoop rather than a cowl would provide more direct airflow and positive pressure, without adding quite as much of the unneccessary drag.
Insofar as high pressure versus low pressure aiding heat transfer, you would WANT high-pressure air to form. It's denser, can absorb and carry away a lot more heat than low-pressure air. One reason I laugh at people who put five exhaust fans on their computer case, and not one intake fan.. the thinner air cools less effectively, and is more likely to deposit particulate matter (dust) in the low-pressure area on top of that. Same general idea.
To properly exhaust the engine bay air, you need to set up a good ducting path to a lower-pressure area of the car. Optimally exiting BEHIND the car (spot of greatest vacuum also), so as not to interfere with the air passing under the chassis, though the lower airflow is also lower-pressure. The thing is, the under-chassis airflow is *already* drawing air from inside the engine bay, unless you have a full skidplate/proper unifier. Imagine a second set of exhaust pipes, simply running from the ambient engine bay to exit at the rear of the car. The 'high pressure' area in the engine bay in conjunction with the vacuum bubble trailing the car would naturally force the hot engine bay air to be 'sucked' out through the rear, giving you FAR better engine bay exhaust. No telling how much it would actually help though, given that the majority of the cowled underhood temp drop is simply from the cold ambient air entering the bay without going through the radiator first.
Zig...I am Captain Planet!Join Date: 2002-10-23Member: 1576Members
<!--quoteo(post=1659779:date=Nov 7 2007, 01:14 PM:name=Talesin)--><div class='quotetop'>QUOTE(Talesin @ Nov 7 2007, 01:14 PM) <a href="index.php?act=findpost&pid=1659779"><{POST_SNAPBACK}></a></div><div class='quotemain'><!--quotec-->Again, the underhood temps drop not because air is being exhausted, but rather that air is being pulled in from that high pressure gap. One of my favorite sayings is 'Just because it runs <i>at all</i> doesn't mean it's running <b>right</b>'. Sure, it works. It also screws up the vacuum under the car, providing more high-speed instability. Tuft the car, see what the air is actually doing. Ten bucks says the cowl is sucking cool air in backward to drop the temps, not acting to exhaust it. I mean, think about it. They put the vent intakes there. It pushes air INTO the cabin (a static high-pressure bubble), it doesn't suck air out of the cabin. Same thing with the shimmed/cowled hood, just into the engine bay which is a non-static (AND lower pressure) area. You would get more of the SAME cooling effect by shimming the FRONT of the hood. In either case, a scoop rather than a cowl would provide more direct airflow and positive pressure, without adding quite as much of the unneccessary drag.
Insofar as high pressure versus low pressure aiding heat transfer, you would WANT high-pressure air to form. It's denser, can absorb and carry away a lot more heat than low-pressure air. One reason I laugh at people who put five exhaust fans on their computer case, and not one intake fan.. the thinner air cools less effectively, and is more likely to deposit particulate matter (dust) in the low-pressure area on top of that. Same general idea.
To properly exhaust the engine bay air, you need to set up a good ducting path to a lower-pressure area of the car. Optimally exiting BEHIND the car (spot of greatest vacuum also), so as not to interfere with the air passing under the chassis, though the lower airflow is also lower-pressure. The thing is, the under-chassis airflow is *already* drawing air from inside the engine bay, unless you have a full skidplate/proper unifier. Imagine a second set of exhaust pipes, simply running from the ambient engine bay to exit at the rear of the car. The 'high pressure' area in the engine bay in conjunction with the vacuum bubble trailing the car would naturally force the hot engine bay air to be 'sucked' out through the rear, giving you FAR better engine bay exhaust. No telling how much it would actually help though, given that the majority of the cowled underhood temp drop is simply from the cold ambient air entering the bay without going through the radiator first.<!--QuoteEnd--></div><!--QuoteEEnd-->
Okay, now I completely get what you're saying.
When I get home I'll show you a vid of a big block drag Z doing a wheelie and nearly flying off the track (hadn't added a wheelie bar yet). With a fairly huge hood scoop.
What do <b>YOU</b> drive? Let's see some more variety in this thread. If it can be driven and it transports you from point A to point B we want to see it.
Car, truck, bike, moped, motorcycle, boat, ATV... whatever you drive we want to see it!
I'm assuming that's a different car/driver since the hood scoop looks different. Or did you seriously try to take off in your car (you're missing wings)
e/ nevermind I just read your previous post. I do still expect you to fly like that. P.S can we see more interior shots? And is that a picture of the current state of your car - cause if so it's come a very long way and looks quite nice.
Zig...I am Captain Planet!Join Date: 2002-10-23Member: 1576Members
NO NO NO NO NO XDDDDDD
sh*... I wish my car looked like that D: and drove like that..
no it's some Canadian guy's car. His engine is also a big block, not a smallblock like mine. Mine will probably make a healthy 400+hp, his is twin-turbo'd and probably tuned for racefuel and making near 1000hp... crazy
I met a guy the other day, we're planning to drop a spare v8 he has laying around into my festiva. I need to check out its underguts to see if i could make a rwd mid-engine easier than beating in the front to fit a v8.
Also i love that z, what a beast. Wish i had the time/money to build me one, their one of my favorites <img src="style_emoticons/<#EMO_DIR#>/smile-fix.gif" style="vertical-align:middle" emoid=":)" border="0" alt="smile-fix.gif" />
<!--quoteo(post=1669433:date=Feb 3 2008, 05:31 PM:name=Drfuzzy)--><div class='quotetop'>QUOTE(Drfuzzy @ Feb 3 2008, 05:31 PM) <a href="index.php?act=findpost&pid=1669433"><{POST_SNAPBACK}></a></div><div class='quotemain'><!--quotec-->I met a guy the other day, we're planning to drop a spare v8 he has laying around into my festiva. I need to check out its underguts to see if i could make a rwd mid-engine easier than beating in the front to fit a v8.
Also i love that z, what a beast. Wish i had the time/money to build me one, their one of my favorites <img src="style_emoticons/<#EMO_DIR#>/smile-fix.gif" style="vertical-align:middle" emoid=":)" border="0" alt="smile-fix.gif" /><!--QuoteEnd--></div><!--QuoteEEnd--> A Festiva weighs what, 1800 lbs.? And you want to stuff a V-8 in it? The same Festiva that has sheet metal thinner than a soda can on the body? I hate to burst your bubble, but without substantially beefing up the frame and suspension this just isn't going to work. <img src="style_emoticons/<#EMO_DIR#>/wow.gif" style="vertical-align:middle" emoid=":0" border="0" alt="wow.gif" />
It handles sooo sooo incredibly well too, it's like night and day.
Of course it helps what I went from these cut springs to this awesome racing suspension. <img src="style_emoticons/<#EMO_DIR#>/smile-fix.gif" style="vertical-align:middle" emoid=":)" border="0" alt="smile-fix.gif" />
TalesinOur own little well of hateJoin Date: 2002-11-08Member: 7710NS1 Playtester, Forum Moderators
Well, going from Honda-kid visual tricks to properly purpose-designed parts tends to do that, Paranub. ;D
Tranny finally died on the GSX, waiting until I have the money to repair it, or put in a down-payment on a newer car (the Saturn Sky Redline Hardtop really has my eye). Seems like the 1-2 assembly got skrodded, after a seal leaked out a good portion of the gear oil through the clutch fork passthrough without me noticing. Depressing as it goes into 3-5 so easily, and still pulls like nobody's business when I take it around the block a couple times to keep anything from seizing up. Kinda want to find a 89-91 Mirage again and do the engine swap, sell off the GSX as a rolling shell and get a Redline.
If I could do it over again and since I actually have a car to drive.
I'd get a shell and build up from there. <img src="style_emoticons/<#EMO_DIR#>/smile-fix.gif" style="vertical-align:middle" emoid=":)" border="0" alt="smile-fix.gif" />
Not sure how popular the Impreza is on the other side of the pond but it's based on the title winning Impreza that Subaru puts out in the World Rally Championship.
Current mods: Bailey dump valve, WRX mud flaps, plate surround and sunstrip.
Not sure how popular the Impreza is on the other side of the pond but it's based on the title winning Impreza that Subaru puts out in the World Rally Championship.
Current mods: Bailey dump valve, WRX mud flaps, plate surround and sunstrip.
Sick ride. If I wanted an already fast out of the box car, I'd probably get a STI. <img src="style_emoticons/<#EMO_DIR#>/smile-fix.gif" style="vertical-align:middle" emoid=":)" border="0" alt="smile-fix.gif" />
Btw, my project motor is finally mine! <img src="style_emoticons/<#EMO_DIR#>/biggrin-fix.gif" style="vertical-align:middle" emoid=":D" border="0" alt="biggrin-fix.gif" /> Now to start building it up.
<!--quoteo(post=1686188:date=Aug 18 2008, 04:05 PM:name=ChuckstarNL)--><div class='quotetop'>QUOTE(ChuckstarNL @ Aug 18 2008, 04:05 PM) <a href="index.php?act=findpost&pid=1686188"><{POST_SNAPBACK}></a></div><div class='quotemain'><!--quotec-->Here's my car: 1986 Citroën 2cv, goes from 0-60 mph in 35 secs! <img src="style_emoticons/<#EMO_DIR#>/biggrin-fix.gif" style="vertical-align:middle" emoid=":D" border="0" alt="biggrin-fix.gif" />
Picture is just after I washed it. License plate censored lawl.<!--QuoteEnd--></div><!--QuoteEEnd--> Looks like it'd make a great taxi! <img src="style_emoticons/<#EMO_DIR#>/tounge.gif" style="vertical-align:middle" emoid=":p" border="0" alt="tounge.gif" />
<!--quoteo(post=1587530:date=Dec 12 2006, 03:51 PM:name=enf0rcer)--><div class='quotetop'>QUOTE(enf0rcer @ Dec 12 2006, 03:51 PM) <a href="index.php?act=findpost&pid=1587530"><{POST_SNAPBACK}></a></div><div class='quotemain'><!--quotec-->If I was going to waste my money on a movie prop vehicle I'd buy something like the tumbler from batman begins.
Comments
500+ rwhp/tq rated overbored 350 chevy, TKO 600 trans, quaife rear end.
<a href="http://media.putfile.com/240Z-350SBC" target="_blank">http://media.putfile.com/240Z-350SBC</a><!--QuoteEnd--></div><!--QuoteEEnd-->
Your video has successfully given me a card-on, Zig. Looks absolutely awesome.
Thoughts:
-Could drop the weight even further by going with a CF hood, and painting it to match the car when (if?) you get the whole thing done.
-DOT regulation states that the exhaust on a street-legal vehicle has to exit after the B-pillar. Give some consideration to picking up a pair of 90-degree Mandrel bends and a couple of shorty Magnaflows.. might have room that way, given that you apparently don't have a back seat to worry about anyway.
-As an extension of the above, some Japanese manufacturer (Apex`i I think) makes a cable-actuated exhaust butterfly system. They're designed to where you simply unbolt a section of the exhaust, wedge the piping on either side the half-inch either way that the new bit needs, and put the bolts through. Then run the cable into the cabin, allowing you to close the butterfly while driving to quiet things down. Have a buddy with a built Cobra running a pair of these on his side-exit exhausts, and they make a HUGE difference. Backpressure kills a lot of the power, but it's perfectly drivable. Keeps his tucked away, and shuts the butterflies whenever he sees a cop.
-Consider a scoop to curve over that filter, would get <b>proper</b> ram-air that way (though you might need to build a 'cup' box to seal to the underside of the hood for maximum effect), instead of simply being cold air.
What I'm doing as far as exhaust... I have to get a smaller fuel cell, as the 22gal takes up the entire rear of the car. I'll get a narrower 15/16/17gal or something, and run two Magnaflows, one on either side of the fuel cell, sitting vertically. It'll probably still be loud as sh*... but at least I won't get like, instantly ticketed for noise pollution. Maybe.
Exhaust cutouts are cool but I can only afford a butterfly nut cutout, and I'm pretty lazy and wouldn't want to have to unscrew it every time either. So I'm just going with straight piping and magnaflows (or ######s, those are rated really well for smallblock applications) for the same power and a tolerable noise level.
I plan to bolt a cowl down over that hole.. probably cut the hole out to fit the cowl. People have been really successful with cowl induction in V8 Zs. Probably just work on a mild undertray, and sealing up the mouth of the airdam and hood, so that the air coming into the grille definitely moves through the engine bay and through the filter.
This'll be quite an effort to make right for the street.... I'm going to strip out the entire interior, to the firewall, and coat it down with herculiner or something, and then lay it over with eDead sound deadener. That should make things a little cozier in there too. Then there's laying down carpet, putting stock Z doors back on it, etc.. haha.
The ones I'm talking about aren't cutouts, they're in-line butterflies to restrict the exhaust path and quieten things down. You don't even unscrew them, just leave them in-line and fully open when you want no restriction, and for around-town driving close them (via the cable) so police won't glare at you QUITE as much, trading off a good bit of power loss for fewer noise tickets. Exhaust cutouts are illegal in CA, and can lead to the car being impounded on the spot if an officer catches you with one on the street.
I'd recommend against allowing airflow down into the engine bay via the hood hole; it'll make negligible difference to underhood temps, while at the same time screwing up the vacuum under the car at-speed. A tray under the air filter out and around the hole, with some (foam?) rubber weatherstripping would make sure the tray seals to the underside of the hood, that all that air went straight into the filter, and at a bit of positive pressure to boot when at freeway speeds. I'd also recommend putting on some kind of screen... known a few STIs who have managed to suck birds into their hood scoop, and end up with a mangled (and well-cooked) mess all over their intercooler. Would be even worse with just a paper filter there before your carb.
First Up!
My 2001 Chevrolet Xtreme Blazer (Competition Stereo Vehicle)
<img src="http://i26.photobucket.com/albums/c118/jontobin15/Waxed%20Blazer/after3.jpg" border="0" class="linked-image" />
Current Build 16 12" Woofers (clamshell design) on 4 PA A1800DB's Strapped via Maxxsonics Maxxlink
Second!
My 1989 Mazda B2200 Bagged Laying Frame! (Minitruck)
<img src="http://a74.ac-images.myspacecdn.com/images01/56/l_a1fde10ee4533dc01bba7e6eae5eb261.jpg" border="0" class="linked-image" />
And with my new job with Mercedes Benz Im looking into either a new Corvette (c6) or a Saturn Sky Redline
The ones I'm talking about aren't cutouts, they're in-line butterflies to restrict the exhaust path and quieten things down. You don't even unscrew them, just leave them in-line and fully open when you want no restriction, and for around-town driving close them (via the cable) so police won't glare at you QUITE as much, trading off a good bit of power loss for fewer noise tickets. Exhaust cutouts are illegal in CA, and can lead to the car being impounded on the spot if an officer catches you with one on the street.
I'd recommend against allowing airflow down into the engine bay via the hood hole; it'll make negligible difference to underhood temps, while at the same time screwing up the vacuum under the car at-speed. A tray under the air filter out and around the hole, with some (foam?) rubber weatherstripping would make sure the tray seals to the underside of the hood, that all that air went straight into the filter, and at a bit of positive pressure to boot when at freeway speeds. I'd also recommend putting on some kind of screen... known a few STIs who have managed to suck birds into their hood scoop, and end up with a mangled (and well-cooked) mess all over their intercooler. Would be even worse with just a paper filter there before your carb.<!--QuoteEnd--></div><!--QuoteEEnd-->
Yeah, I know what you're saying. The car currently sits about 51/49 front and rear. The battery is definitely going in the back (it's sitting where the passenger seat is going in..)
I see what you're saying about the in-line butterflies... but honestly, I don't want to get that complicated if I can just do a one-off, straight-through performance exhaust that still stays pretty quiet with the magnaflows. It should be... bearable. And the pigs will profile and pull over a tuner car for their exhaust noise, rather than a classic, every time.
I'm not putting a scoop on the hood. I'm putting a cowl on it. Ideally something like either of these.
<img src="http://img216.imageshack.us/img216/5434/zcowlgw4.jpg" border="0" class="linked-image" /> <img src="http://memimage.cardomain.net/member_images/1/web/685000-685999/685533_122.jpg" border="0" class="linked-image" />
Cowl induction is for letting air out, not taking it in like a scoop. In some cars, air flow creates a high-pressure area in the engine bay (the Z is an example), and the cowl lets it escape out the back. Pretty common on HybridZ (where I do all my planning/scheming/dreaming/wishing/hoping)
And police tend to pop modified 'imports', regardless of age. Mustangs can get away with a hell of a lot more than a Datsun or DSM.
Don't you think there's a chance that maybe all these guys are doing it right? I'm inclined to trust prior experience rather than go off and do my own thing and not know what the hell I'm doing.
<!--quoteo--><div class='quotetop'>QUOTE</div><div class='quotemain'><!--quotec-->And police tend to pop modified 'imports', regardless of age. Mustangs can get away with a hell of a lot more than a Datsun or DSM.<!--QuoteEnd--></div><!--QuoteEEnd-->Well it won't look like a ricer when I'm done with it.. might even sell the cobra replicas and go with some nice deep polished centerlines. All the chrome will be clean, replaced maybe. I'll probably mount chrome bullet mirrors on the front fenders, too. Etc.
So when the cops are driving next to me they'll hear an audially pleasing, low, classic muscle idle. Instead of a 1.6L N/A fart-can retard howl. And when they look over they'll see a '73 with a nice gloss black paint job with tasteful chrome accents (decided on gloss black.), instead of a hideous '92 Toyota amalgamation of factory teal and primered aero kit parts.
Don't you agree?
Insofar as high pressure versus low pressure aiding heat transfer, you would WANT high-pressure air to form. It's denser, can absorb and carry away a lot more heat than low-pressure air. One reason I laugh at people who put five exhaust fans on their computer case, and not one intake fan.. the thinner air cools less effectively, and is more likely to deposit particulate matter (dust) in the low-pressure area on top of that. Same general idea.
To properly exhaust the engine bay air, you need to set up a good ducting path to a lower-pressure area of the car. Optimally exiting BEHIND the car (spot of greatest vacuum also), so as not to interfere with the air passing under the chassis, though the lower airflow is also lower-pressure. The thing is, the under-chassis airflow is *already* drawing air from inside the engine bay, unless you have a full skidplate/proper unifier. Imagine a second set of exhaust pipes, simply running from the ambient engine bay to exit at the rear of the car. The 'high pressure' area in the engine bay in conjunction with the vacuum bubble trailing the car would naturally force the hot engine bay air to be 'sucked' out through the rear, giving you FAR better engine bay exhaust. No telling how much it would actually help though, given that the majority of the cowled underhood temp drop is simply from the cold ambient air entering the bay without going through the radiator first.
Insofar as high pressure versus low pressure aiding heat transfer, you would WANT high-pressure air to form. It's denser, can absorb and carry away a lot more heat than low-pressure air. One reason I laugh at people who put five exhaust fans on their computer case, and not one intake fan.. the thinner air cools less effectively, and is more likely to deposit particulate matter (dust) in the low-pressure area on top of that. Same general idea.
To properly exhaust the engine bay air, you need to set up a good ducting path to a lower-pressure area of the car. Optimally exiting BEHIND the car (spot of greatest vacuum also), so as not to interfere with the air passing under the chassis, though the lower airflow is also lower-pressure. The thing is, the under-chassis airflow is *already* drawing air from inside the engine bay, unless you have a full skidplate/proper unifier. Imagine a second set of exhaust pipes, simply running from the ambient engine bay to exit at the rear of the car. The 'high pressure' area in the engine bay in conjunction with the vacuum bubble trailing the car would naturally force the hot engine bay air to be 'sucked' out through the rear, giving you FAR better engine bay exhaust. No telling how much it would actually help though, given that the majority of the cowled underhood temp drop is simply from the cold ambient air entering the bay without going through the radiator first.<!--QuoteEnd--></div><!--QuoteEEnd-->
Okay, now I completely get what you're saying.
When I get home I'll show you a vid of a big block drag Z doing a wheelie and nearly flying off the track (hadn't added a wheelie bar yet). With a fairly huge hood scoop.
Car, truck, bike, moped, motorcycle, boat, ATV... whatever you drive we want to see it!
<img src="http://i66.photobucket.com/albums/h277/th0r0n/CleanVifAngle-1.jpg" border="0" class="linked-image" />
<img src="http://i66.photobucket.com/albums/h277/th0r0n/MeOnViffW.jpg" border="0" class="linked-image" />
<a href="http://ywnv.vidiac.com/recentvideos/7/8398a7ec-f655-4e70-9d11-99ab012eba03.htm" target="_blank">http://ywnv.vidiac.com/recentvideos/7/8398...9ab012eba03.htm</a>
<img src="http://album.hybridz.org/data/500/medium/03200006.jpg" border="0" class="linked-image" />
e/ nevermind I just read your previous post. I do still expect you to fly like that. P.S can we see more interior shots? And is that a picture of the current state of your car - cause if so it's come a very long way and looks quite nice.
sh*... I wish my car looked like that D: and drove like that..
no it's some Canadian guy's car. His engine is also a big block, not a smallblock like mine. Mine will probably make a healthy 400+hp, his is twin-turbo'd and probably tuned for racefuel and making near 1000hp... crazy
Also i love that z, what a beast. Wish i had the time/money to build me one, their one of my favorites <img src="style_emoticons/<#EMO_DIR#>/smile-fix.gif" style="vertical-align:middle" emoid=":)" border="0" alt="smile-fix.gif" />
Also i love that z, what a beast. Wish i had the time/money to build me one, their one of my favorites <img src="style_emoticons/<#EMO_DIR#>/smile-fix.gif" style="vertical-align:middle" emoid=":)" border="0" alt="smile-fix.gif" /><!--QuoteEnd--></div><!--QuoteEEnd-->
A Festiva weighs what, 1800 lbs.? And you want to stuff a V-8 in it? The same Festiva that has sheet metal thinner than a soda can on the body? I hate to burst your bubble, but without substantially beefing up the frame and suspension this just isn't going to work. <img src="style_emoticons/<#EMO_DIR#>/wow.gif" style="vertical-align:middle" emoid=":0" border="0" alt="wow.gif" />
<img src="style_emoticons/<#EMO_DIR#>/smile-fix.gif" style="vertical-align:middle" emoid=":)" border="0" alt="smile-fix.gif" />
<img src="http://img.photobucket.com/albums/v155/Paranoia2MB/Cars/StanceBox.jpg" border="0" class="linked-image" />
<img src="http://img.photobucket.com/albums/v155/Paranoia2MB/Cars/StanceOutofbox2.jpg" border="0" class="linked-image" />
<img src="http://img.photobucket.com/albums/v155/Paranoia2MB/Cars/StanceOutofbox3.jpg" border="0" class="linked-image" />
<img src="http://img.photobucket.com/albums/v155/Paranoia2MB/Cars/StanceOutofbox4.jpg" border="0" class="linked-image" />
<img src="http://img.photobucket.com/albums/v155/Paranoia2MB/Cars/StanceOutofbox1.jpg" border="0" class="linked-image" />
<img src="http://img.photobucket.com/albums/v155/Paranoia2MB/Cars/StanceInstall2.jpg" border="0" class="linked-image" />
<img src="http://img.photobucket.com/albums/v155/Paranoia2MB/Cars/StanceInstall1.jpg" border="0" class="linked-image" />
<img src="http://img.photobucket.com/albums/v155/Paranoia2MB/Cars/StanceInstall3fullenginebay.jpg" border="0" class="linked-image" />
And I got my JDM TYTE YO (lol) window visors. Window visors/rain guards are such a ###### to get at times. Mine was a 6 month backorder.
Of course it helps what I went from these cut springs to this awesome racing suspension. <img src="style_emoticons/<#EMO_DIR#>/smile-fix.gif" style="vertical-align:middle" emoid=":)" border="0" alt="smile-fix.gif" />
Tranny finally died on the GSX, waiting until I have the money to repair it, or put in a down-payment on a newer car (the Saturn Sky Redline Hardtop really has my eye). Seems like the 1-2 assembly got skrodded, after a seal leaked out a good portion of the gear oil through the clutch fork passthrough without me noticing. Depressing as it goes into 3-5 so easily, and still pulls like nobody's business when I take it around the block a couple times to keep anything from seizing up. Kinda want to find a 89-91 Mirage again and do the engine swap, sell off the GSX as a rolling shell and get a Redline.
I'd get a shell and build up from there. <img src="style_emoticons/<#EMO_DIR#>/smile-fix.gif" style="vertical-align:middle" emoid=":)" border="0" alt="smile-fix.gif" />
<img src="http://img.photobucket.com/albums/v90/Sops102/P1010078.jpg" border="0" class="linked-image" />
But I've gotten to take this out for a few rides.
<img src="http://img140.imageshack.us/img140/1470/0901649ng4.jpg" border="0" class="linked-image" />
<img src="http://c.imagehost.org/0392/Scooby_001.jpg" border="0" class="linked-image" />
<img src="http://c.imagehost.org/0063/Scooby_005.jpg" border="0" class="linked-image" />
<img src="http://c.imagehost.org/0072/Scooby_007.jpg" border="0" class="linked-image" />
Not sure how popular the Impreza is on the other side of the pond but it's based on the title winning Impreza that Subaru puts out in the World Rally Championship.
Current mods: Bailey dump valve, WRX mud flaps, plate surround and sunstrip.
Future mods: WRC decals, Simota air intake (panel filter), Tornado rear silencer.
Not sure how popular the Impreza is on the other side of the pond but it's based on the title winning Impreza that Subaru puts out in the World Rally Championship.
Current mods: Bailey dump valve, WRX mud flaps, plate surround and sunstrip.
Future mods: WRC decals, Simota air intake (panel filter), Tornado rear silencer.<!--QuoteEnd--></div><!--QuoteEEnd-->
Sick ride. If I wanted an already fast out of the box car, I'd probably get a STI. <img src="style_emoticons/<#EMO_DIR#>/smile-fix.gif" style="vertical-align:middle" emoid=":)" border="0" alt="smile-fix.gif" />
Btw, my project motor is finally mine! <img src="style_emoticons/<#EMO_DIR#>/biggrin-fix.gif" style="vertical-align:middle" emoid=":D" border="0" alt="biggrin-fix.gif" />
Now to start building it up.
/edited the pictures out, less clutter\
1986 Citroën 2cv, goes from 0-60 mph in 35 secs! <img src="style_emoticons/<#EMO_DIR#>/biggrin-fix.gif" style="vertical-align:middle" emoid=":D" border="0" alt="biggrin-fix.gif" />
Picture is just after I washed it. License plate censored lawl.
1986 Citroën 2cv, goes from 0-60 mph in 35 secs! <img src="style_emoticons/<#EMO_DIR#>/biggrin-fix.gif" style="vertical-align:middle" emoid=":D" border="0" alt="biggrin-fix.gif" />
Picture is just after I washed it. License plate censored lawl.<!--QuoteEnd--></div><!--QuoteEEnd-->
Looks like it'd make a great taxi! <img src="style_emoticons/<#EMO_DIR#>/tounge.gif" style="vertical-align:middle" emoid=":p" border="0" alt="tounge.gif" />
<img src="http://static.flickr.com/37/100324884_38e21ce6cc.jpg" border="0" class="linked-image" /><!--QuoteEnd--></div><!--QuoteEEnd-->
what is the story behind this tumbler? is it a replica for sale or a movie prop that was sold on E-bay?
I saw this on youtube
<a href="http://www.youtube.com/watch?v=4oSQyTPg_3E" target="_blank">http://www.youtube.com/watch?v=4oSQyTPg_3E</a>
looks like the same one.
<a href="http://blog.makezine.com/archive/2008/08/diy_batman_tumbler.html" target="_blank">http://blog.makezine.com/archive/2008/08/d...an_tumbler.html</a>