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Old 05-30-2018, 10:49 AM   #1
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Front fender vents

There is a steep penalty in NASA TT for front splitters but no penalty for rear wings so you end up with a challenge balancing the car out. I’m wondering if fender vents above the wheels would help. Boxsters have not only brake cooling air entering the wells but also the radiator air (if you’ve modified your fenders like most of us have) so I think boxsters would be a good candidate. Has anyone tried this?

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Old 05-30-2018, 10:58 AM   #2
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i've thought about it, but probably the most invasive mod you can do - cutting and such. have you done the centre vent?
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Old 05-30-2018, 11:01 AM   #3
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and of course the new gt3.
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Old 05-30-2018, 11:09 AM   #4
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i've thought about it, but probably the most invasive mod you can do - cutting and such. have you done the centre vent?
I don’t have a center radiator so no, you can only get away with it if they’re for “cooling” technically the fender vents promote brake cooling so people get away with it. I think I might go for it.
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Old 05-30-2018, 11:30 AM   #5
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Here's what I'm thinking, the Rough Mustang vents are flexible, effective and cheap. Apparently the best position is at the top of the wheel well where air pressure is the highest (the tire pulls air up the back as it spins and the incoming from the ducts and rad meets it at the top of the tire.

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Old 05-30-2018, 12:17 PM   #6
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Probably a better route.

c6 corvette fender vents



Also has anyone done any engine venting? Maybe existing through the top hatch and out the clamshell?
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Old 05-30-2018, 12:57 PM   #7
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Interesting idea, you need to see which flows better with the porsche lines though. They not have one for 996 cars?
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Old 05-30-2018, 01:31 PM   #8
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Interesting idea, you need to see which flows better with the porsche lines though. They not have one for 996 cars?
Oddly not that I can find. You’d think with the new GT3 fender vents someone would be making a kit for the 996 or 997
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Old 05-30-2018, 01:50 PM   #9
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Oddly not that I can find. You’d think with the new GT3 fender vents someone would be making a kit for the 996 or 997
Yeah really, I tried a google search too.
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Old 05-30-2018, 01:58 PM   #10
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I don’t have a center radiator so no, you can only get away with it if they’re for “cooling” technically the fender vents promote brake cooling so people get away with it. I think I might go for it.
perhaps install a centre rad - for cooling - approved. and only a fool would vent it down ...
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Old 05-30-2018, 02:00 PM   #11
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Here's what I'm thinking, the Rough Mustang vents are flexible, effective and cheap. Apparently the best position is at the top of the wheel well where air pressure is the highest (the tire pulls air up the back as it spins and the incoming from the ducts and rad meets it at the top of the tire.
problem is that the top of our fenders is curved, so tough to find anything that would match that curve properly. that's why i like the first pic i posted - just several slashes across the fender, then bend them down.
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Old 05-30-2018, 07:17 PM   #12
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Old 05-30-2018, 09:38 PM   #13
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problem is that the top of our fenders is curved, so tough to find anything that would match that curve properly. that's why i like the first pic i posted - just several slashes across the fender, then bend them down.
Yeah I gave a better look at the pic, that would be the way to go true cut into vender luvers, like the old hot rod uses. That would flow, and old school hotrod fabricator should be able to do that. Isnt there an inner fender well would need some kind of venting as well to connect the 2 points to actually get the heat out?
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Old 05-30-2018, 10:18 PM   #14
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plastic liner - can be cut or removed.
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Old 05-31-2018, 02:49 AM   #15
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problem is that the top of our fenders is curved, so tough to find anything that would match that curve properly. that's why i like the first pic i posted - just several slashes across the fender, then bend them down.
Ya I agree, the problem is not skilled enough to cut and bend the fenders and make it look right without rewraping or repainting both fenders. I’m thinking the aluminum or ABS panels would take the fender shape with a enough rivets
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Old 05-31-2018, 07:30 AM   #16
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i'd thought about that but it's a significant bend and my fear was the the louvers would distort (and not look cool). i don't live close enough to anywhere to actually get my hands on one to see. there was a company making a cf product for the gt2 that is nla. hey, you can always chumpcar it and get the deed done with a hole saw. otherwise, check the aero - from what i'd read, the highest pressure area is actually just in front of the wheel centreline.
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Old 05-31-2018, 09:26 AM   #17
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maybe buy some janky fenders from Woody to test stamped vents? If it works, then do it to your originals?
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Old 06-01-2018, 05:25 AM   #18
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Well TT director just confirmed that this is illegal. Not sure how everyone is getting away with it but I’d rather not test the waters. Someone else should carry the torch though!

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