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Which vented hood would provide the best cooling and downforce

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Old 03-12-2013, 06:40 AM
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taken19
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Default Which vented hood would provide the best cooling and downforce

Here are couple hoods I'm considering. Please provide your input as to which one would provide the best cooling. I would assume that each would most likely produce about the same downforce (reduced lift actually), and I'd also bet that the cooling effect is pretty close as well. Maybe the World Challenge hood would offer superior cooling since the center louvers are just behind the radiator, but your opinions are welcomed.

RPI designs and MTI Extractor



Corvette Mods



Katech



ACP and LG World Challenge




Edit: almost forgot Halltech...



Not many designs out there, but prices are all over the place. Any idea how much to paint? Wrapping can be anywhere from $400-1000 depending on material and design.

Last edited by taken19; 03-12-2013 at 04:23 PM.
Old 03-12-2013, 09:04 AM
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ErnieN85
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World challenge (LG) and Hall are probably the best
but you will get minimal downforce without a splitter
a few of us did a hood swap with similar hood at VIR last year and little or no sop difference in keeping the front end down at 150 on the back straight still a bit light going over the top vs stock
Old 03-12-2013, 09:44 AM
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Gman57
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I'm not and expert on this but I think it takes both front and rear aero to make the package.


Last edited by Gman57; 03-10-2014 at 10:29 PM.
Old 03-12-2013, 10:31 AM
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ErnieN85
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no doubt about it
Love your setup
Old 03-12-2013, 12:42 PM
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davidfarmer
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World Challenge is my vote.......... or vent your own!
Old 03-12-2013, 03:47 PM
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Falcon
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Originally Posted by Bedouin
Curious about the 'vent your own' option. Are there louvre inserts that could be installed (two rectangular shaped holes cut into the hood) & solid mounted into the hood...like the two side louvres of the World Challenge hood...?
Ebay is your friend.
Old 03-12-2013, 04:10 PM
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taken19
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Do you guys think the WC hood will make that much more difference over the others? It's double the cost of the others (except Halltech). Trying to balance cost and function here.
Old 03-12-2013, 04:14 PM
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taken19
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Originally Posted by Gman57
I'm not and expert on this but I think it takes both front and rear aero to make the package.

Gorgeous car! I don't think my pockets are as deep as your though. I am considering a ZR1 style splitter as a stop gap until I can get a true splitter/wing combo... May have to sell a kidney for that! Or sell my first born... Man this stuff is expensive
Old 03-12-2013, 04:17 PM
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taken19
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Originally Posted by davidfarmer
World Challenge is my vote.......... or vent your own!
I kinda like the vent your own option as well. I found a used hood locally here for cheap and may consider venting it and painting to match my car.

My heart really sits with the WC hood, although my wallet doesn't. I need a way to justify buying it Can I get a little help?
Old 03-12-2013, 04:24 PM
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taken19
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No opinions on the Corvette Mods hood? It seems to be a good compromise in price and function.

Old 03-12-2013, 04:48 PM
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John Shiels
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Originally Posted by taken19
I kinda like the vent your own option as well. I found a used hood locally here for cheap and may consider venting it and painting to match my car.

My heart really sits with the WC hood, although my wallet doesn't. I need a way to justify buying it Can I get a little help?
It works great. Then vent your wheel-wells for a few dollars. Look for used or make a wanted post. ACP/LG hood. You can get them in fiberglass and not CF for less.
Old 03-12-2013, 05:32 PM
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Mike Farris
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I would imagine the World Challenge hood would be pretty good for you since it was purpose built for that. I do like the looks of the MTI hood though


Originally Posted by taken19
I am considering a ZR1 style splitter as a stop gap until I can get a true splitter/wing combo...
Are there good ZR1 splitters for non widebody cars? Can you run a real splitter that seals under on a base coupe? Will it cool enough since coupes are bottomfeeders?
Old 03-12-2013, 05:36 PM
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jlutherva
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Originally Posted by taken19
Gorgeous car! I don't think my pockets are as deep as your though. I am considering a ZR1 style splitter as a stop gap until I can get a true splitter/wing combo... May have to sell a kidney for that! Or sell my first born... Man this stuff is expensive
If ya think the initial outlay is painful, just wait until you do some "landscaping" and get to replace it

Cheers,
Jim
Old 03-12-2013, 05:40 PM
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Originally Posted by ErnieN85
World challenge (LG) and Hall are probably the best
but you will get minimal downforce without a splitter
a few of us did a hood swap with similar hood at VIR last year and little or no sop difference in keeping the front end down at 150 on the back straight still a bit light going over the top vs stock
I've got the Katech splitter and and undertray w/ the Katech spoiler and those virtually eliminate the lightness over the rise on the back straightaway at VIR, but I don't think I'm hitting 150 mph at that point. I might be at 150 at the bottom but that's not a good time to be lookin' at the HUD.

Jim
Old 03-12-2013, 10:05 PM
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BDRME
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FYI, the World Challenge hood was designed with the help of a wind tunnel!

me
Old 03-13-2013, 03:30 PM
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Originally Posted by taken19
No opinions on the Corvette Mods hood? It seems to be a good compromise in price and function.

It looks great but you would have to find someone with one to know about the fitment.
Old 03-13-2013, 03:32 PM
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Mike Farris
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Looks busy to me. May function well but you know the Halltech and World Challenge hoods are made specifically for function.

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To Which vented hood would provide the best cooling and downforce

Old 03-13-2013, 03:41 PM
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TKOGTO
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Originally Posted by jlutherva
I've got the Katech splitter and and undertray w/ the Katech spoiler and those virtually eliminate the lightness over the rise on the back straightaway at VIR, but I don't think I'm hitting 150 mph at that point. I might be at 150 at the bottom but that's not a good time to be lookin' at the HUD.

Jim
I have the same setup, along with the side skirts.

I wonder how much additional downforce you get with one of these vented hoods. My car oversteered a fair amount with just the splitter and skirts. AH (in Comp Mode) would whack one of the right side wheels fiercely about midway through the downhill at Lime Rock. Added the spoiler and intervention has not reoccurred. If you add the vented hood, I wonder if the front end grip increases enough to start the oversteering / invention all over again?

I like some of these hoods but not enough to upset the balance.
Old 03-13-2013, 03:43 PM
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ErnieN85
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yes you need a wing for balance with a splitter
Old 03-13-2013, 04:03 PM
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taken19
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Originally Posted by Mike Farris
Looks busy to me. May function well but you know the Halltech and World Challenge hoods are made specifically for function.
I agree with the look, kinda "Transformer-ish"...

I'm less worried about look as long as it functions well, but I'm on board with you.


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