 V8 radiator outlets, alternative to cutting wheelhouse? |
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| 914ltd |
 Jan 24 2006, 11:01 AM
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#1
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Member  Group: Members Posts: 239 Joined: 18-April 03 From: Peoria, IL Member No.: 581 Region Association: None 
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Hi Guys, A couple years ago we took a 914/Chev back to stock for a customer. I then decided to build a 283 powered car for myself. I would like to avoid the huge cutouts in the wheelhouse. has anyone mounted a fan on the trunk floor, possibly with the 2 fans already on the radiator? This would be great for an already AC cut trunk floor. I'd appreciate your input. Thanks! Brad
914 Limited Inc. Brad Mayeur 1162 N. Byerly Hills Dr. East Peoria, IL. 61611 309-694-1797 Fax 309-698-2203 P914ltd@yahoo.com |
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| riverman |
Jan 24 2006, 11:22 AM
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#2
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Learn As I Go Group: Members Posts: 449 Joined: 18-January 05 From: Kitchener, ON Member No.: 3,466 |
Check out Philip Haun's V6 conversion. He has a radiator and fan unit mounted on the floor of the front trunk. All the air vents out the bottom of the car. Picture of the set-up here.
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| neo914-6 |
Jan 24 2006, 11:38 AM
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#3
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neo life Group: Members Posts: 5,086 Joined: 16-January 03 From: Willow Glen (San Jose) Member No.: 159 |
Laid down was how Jaide did it in the 80's. They even put a cover to keep the trunk useful. It may be in my "Jaide" thread in my signature...
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| Rand |
Jan 24 2006, 12:55 PM
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#4
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Cross Member Group: Members Posts: 7,409 Joined: 8-February 05 From: OR Member No.: 3,573 Region Association: None |
How feasible could an engine-bay setup be? I know it wouldn't fit in front like the Suby, but there is some room beside a v8... is it even close to being enough?
Maybe a short and wide radiator, side duct from outside like modern mid-engine cars for intake, and a low profile duct across the engine-side directing exhaust air down? I haven't had a chance to take a close look at a v8 engine bay with this in mind, so this may be out of the question. But I don't know, so I thought I'd throw this out there and get some comments. Green=radiator, red=duct... Attached image(s) 
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| Mueller |
Jan 24 2006, 01:01 PM
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#5
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None
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Brad,
Reddawg also has thier radiators exit thru the floor, I've only seen one of thier radiator setups up close and personal in a Chevy Vortec 4.3 V6 in a 914 and the owner never mentioned having any problems with it. |
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| MikeP |
Jan 24 2006, 01:06 PM
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#6
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Member Group: Members Posts: 321 Joined: 13-June 05 From: San Jose, CA Member No.: 4,268 |
It just so happens that I have the fiberglass mount for that setup. I have not taken it out yet as I was thinking of enclosing the radiator exhaust with an aluminum duct that tied it all together. I may go with all aluminum and remove it, if so I'll offer it in the classifieds.
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| Crazyhippy |
Jan 24 2006, 01:16 PM
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#7
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Insert witty comment here... Group: Members Posts: 1,659 Joined: 28-July 05 From: Home of the Coyotes, AZ Member No.: 4,493 Region Association: None |
The bigest problem w/ going through the floor is it is a much higher pressure area than the wheel wells. Same issue occurs going through the hood.
Perhaps the same 1" lip at the leading edge of the hole will help (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif) End up w/ a LOT of air being passed under the car though, remeber that during your high speed testing (IMG:http://www.914world.com/bbs2/html/emoticons/clap56.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/beer.gif) BJH |
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| marks914 |
Jan 25 2006, 10:57 AM
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#8
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Senior Member Group: Members Posts: 845 Joined: 9-October 04 From: the motor city Member No.: 2,912 Region Association: None |
Hey Brad,
I tried using only the floor cutout for a while, the car ran a little warm. I then cut out the fenderwells, car ran cooler. I put a piece of abs over the hole in the trunk floor and the car never ran hot again. I do not have any scientific data, but that's what my experience is. The air pressure under the car will be higher than in the wheelwells, UNLESS you have an airdam in front and around the sides of the hole in the trunk floor. Idealy the airdam should be just rearward of the radiator air inlet. I will make a diagram. Mark. PS 20,000 miles on my V8 so far |
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| marks914 |
Jan 25 2006, 11:09 AM
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#9
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Senior Member Group: Members Posts: 845 Joined: 9-October 04 From: the motor city Member No.: 2,912 Region Association: None |
Here is a diagram, I had a setup like this too before I cut out my wheelwells, helped a little but not as well as cutting the wheelwells.
Yes, I have spent some time in a full size automotive wind tunnel so I do have some knowledge, just no hard figures. Mark Attached image(s) 
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| mrdezyne |
Jan 25 2006, 11:22 AM
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#10
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Now on larger rolling jack stands! Group: Members Posts: 468 Joined: 31-July 05 From: Tulsa, OK Member No.: 4,510 |
So will this work with a 1" leading edge deflector? Has anyone had success venting through the hood? Otherwise I suppose I will try the fender well thing too..... Attached image(s) 
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| Crazyhippy |
Jan 25 2006, 11:31 AM
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#11
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Insert witty comment here... Group: Members Posts: 1,659 Joined: 28-July 05 From: Home of the Coyotes, AZ Member No.: 4,493 Region Association: None |
"Work" is relative. There are people driving cars set up this way. For it to "work" in my eyes it would have to work better than the fenderwells, and thus far no one has shown me it does. I dont understand why people are opposed to cutting the inner fenders (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif) I have yet to see any stress indicators assuming the holes are cut w/ a smoth corner (holesaw and connect the dots is the best way i've found), and the "eyes" (turn signal humps) are still in place. If you have a chalon or slantnose car, some simple downbars take car of any stress that may occur. BJH |
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| bondo |
Jan 25 2006, 12:18 PM
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#12
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Practicing my perpendicular parking Group: Members Posts: 4,277 Joined: 19-April 03 From: Los Osos, CA Member No.: 587 Region Association: Central California |
The strength of that area comes from the compound curve.. There's a big enough flatish spot that probably doesn't add much strength, and if you cut out both sides it should be enough area for your average V8. That's what I did, we'll see how it works. If you are still worried you can weld in expanded mesh. That will bring back most of the strength but still allow air flow.
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| DBCooper |
Jan 25 2006, 12:23 PM
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#13
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14's in the 13's with ATTITUDE Group: Members Posts: 3,079 Joined: 25-August 04 From: Dazed and Confused Member No.: 2,618 Region Association: Northern California |
1. If you're ever caught out in the rain (assuming you live where rain can come up quickly and unexpectedly) the fenderwell holes will let a lot of dirty water be thrown up and into the trunk. Or you pull over and wait hours (or days) until the rain stops and things dry out. 2. The hood isn't structural, so if you hit anything there isn't much "crumple" potential left up there. 3. Doesn't Renegade cross brace the area under the headlights to eliminate headlight vibration when the wheel wells are cut out? 4. Would be nice to be able to carry something loose up there occasionally, without even having to consider if it might bounce out. And especially: 5. Avoid having to explain points 1 through 4 to every friend who sees the inside of your open trunk when the wheelwells are cut out. |
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| Andyrew |
Jan 25 2006, 12:29 PM
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#14
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Spooling.... Please wait Group: Members Posts: 13,376 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California
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Tis what I have on mysetup..
My main problem is that A; I dont have a 1in leading edge (its very small) B: my hood is flat black and attracts a LOT of heat (read I burn my hand in the sun, vs another 914 had a cool hood) c: I dont have it ducted properly. That being said, I ran it at the wcc... Track it maxed out at 210, and I never saw it over 215. Even durring the 3 hour drive.. Attached image(s) 
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| Andyrew |
Jan 25 2006, 12:31 PM
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#15
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Spooling.... Please wait Group: Members Posts: 13,376 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California
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and hood.
pics are from a long time ago... Attached image(s) 
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| Root_Werks |
Jan 25 2006, 12:33 PM
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#16
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Village Idiot Group: Members Posts: 8,315 Joined: 25-May 04 From: About 5NM from Canada Member No.: 2,105 Region Association: Pacific Northwest
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Since I plan on doing a V8 914 this year, I will have to keep on eye on this thread. Some interesting ideas here. (IMG:http://www.914world.com/bbs2/html/emoticons/idea.gif)
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| andys |
Jan 25 2006, 12:35 PM
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#17
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Advanced Member Group: Members Posts: 2,165 Joined: 21-May 03 From: Valencia, CA Member No.: 721 Region Association: None
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This is what I'm doing. The only thing I dislike about fender well venting, is that it creates a great big hot box ahead of the fuel tank. I have fabricated a duct that is gasketed with foam against the underside of the hood so that all the air will flow through the ducting. Actually, all of the ducting will be completely sealed; intake and exhaust sides. I also like the natural flow of hot air allowed to vent upward when the car is standing still. Hopefully, I can report on the success or failure of this method when I finish the car. Andys Attached thumbnail(s) 
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| Crazyhippy |
Jan 25 2006, 01:41 PM
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#18
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Insert witty comment here... Group: Members Posts: 1,659 Joined: 28-July 05 From: Home of the Coyotes, AZ Member No.: 4,493 Region Association: None |
1. Rain will get in anyways, you have a hole there somewhere (IMG:http://www.914world.com/bbs2/html/emoticons/wacko.gif) And odds are good that there will be more water coming in from the front (w/ the airflow) than fighting through the air to get in. 2. Agreed, no structure in the hood. Very little in the inner fenders w/ stock outer fenders. 3. If the car has cage plans in the future, or has fiberglass fenders, yes. W/ cage plans it's the easiest time to do it... dont have to remove the radiator int he future. W/ fiberglass fenders, the strength of the outerfenders is gone, so there is alot more load on the inners. 4. It can still come out the hole in the floor or hood (IMG:http://www.914world.com/bbs2/html/emoticons/unsure.gif) And You can use expanded sheet metal to cover the holes if you would like. 5. If anyone mentions it... Kick them in the throat (IMG:http://www.914world.com/bbs2/html/emoticons/ninja.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) BJH (IMG:http://www.914world.com/bbs2/html/emoticons/driving.gif) |
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| mrdezyne |
Jan 25 2006, 02:38 PM
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#19
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Now on larger rolling jack stands! Group: Members Posts: 468 Joined: 31-July 05 From: Tulsa, OK Member No.: 4,510 |
I like the idea of venting through the hood for no other reasons other than asthetics. A couple deep vents up there I think would look really agressive. Of course if it cools that would be a bonus. (IMG:http://www.914world.com/bbs2/html/emoticons/dry.gif)
inspriration...... Attached image(s) 
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| mrdezyne |
Jan 25 2006, 02:40 PM
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#20
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Now on larger rolling jack stands! Group: Members Posts: 468 Joined: 31-July 05 From: Tulsa, OK Member No.: 4,510 |
and one really nice little teener...... Who's is this BTW?
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