Hood Venting, NACA Ducts

[wheelhaus]

Originally Posted by Frozen_skidmark

Is heat a problem? I've had the car out in 36℃ 96.8℉ with the A/C on In traffic and never seen the needle go past the second line. Does it start climbing if you're in Texas per se?

The engine seems to be designed to run hot from the factory (its assumed this is for fuel efficiency), but put it on the track and things heat up beyond most people's comfort levels. If you have a turbo tucked under the hood somewhere, they generate a lot more heat at the front of the engine and the heat tends to pool in the engine bay. Enough heat is radiated to melt the radiator fans. Tracking a turbo car is an exercise in failure unless even more heat mitigation precautions are taken.

[kavanagh]

Here's a good thread.

http://www.ft86club.com/forums/showpost.php?p=680966

Also look for posts by @plucas @eric6 and @Hancha Group

They've done aero modeling to see the high and low pressure zones.


Sent from a secret volcano base using trained sharks

[Lunatic]

Originally Posted by radroach

Show us a vid, I want proof!

Will do in two weeks when I get home from vacation.

[Frozen_skidmark]

Originally Posted by wheelhaus

The engine seems to be designed to run hot from the factory (its assumed this is for fuel efficiency), but put it on the track and things heat up beyond most people's comfort levels. If you have a turbo tucked under the hood somewhere, they generate a lot more heat at the front of the engine and the heat tends to pool in the engine bay. Enough heat is radiated to melt the radiator fans. Tracking a turbo car is an exercise in failure unless even more heat mitigation precautions are taken.

I've obviously been taking it way to easy my car! LOL! Yeah I'm glad I decided to stay NA, I don't have the time or ambition to deal with turbo troubles anymore. Used to have a little Omni GLH that I stage III'd with a turbo off a stealth.. had to put a Ford Taurus rad and fan on it. Don't miss those days, I could do a 2.5L head gasket in 45 mins flat. LOL! I love this car so much I don't have the heart to track it! I'd rather buy something used and build that up.

I think using the side plates as vents will probably work though. In conjuction with a low profile hood vent you could get a venturi affect going. I'm definitely going to keep an eye on this thread.

[Dipstik-sportech]

Here's my solution. In traffic my view ahead turns wavy due to the heat coming out of them. Haven't had a heat issue since

[kodyo]

Are those cut into the hood? Can you post a wide shot?

[Dipstik-sportech]

http://www.ft86club.com/forums/showthread.php?p=1842833

[yomny]

Been a while but i actually missed this thread, while creating one exactly bout the same topic. The hood vents.. did you make the rain caps or whatever else you said you were going to do. I wanted to do the same thing to my hood. Similar to what S2k's do to theirs. Any pics of the install? Thank mate. @Dipstik-sportech

[Lunatic]

I never installed them, the ones I ordered were a cheap piece of crap so I didn't install them.

[Dipstik-sportech]

No pics but all I did was the same thing the s2k guys do and job welded the aluminium mesh to the underside. I haven't been motivated enough to make rain caps as my car is parked inside when it rains but I will eventually.

[Tromatic]

Originally Posted by Lunatic

Yesterday I removed the plastic inserts from my fenders. Using my hand held cut off wheel I cut an opening in the inner fender.

My condolences to your car. Fitting user-name as well! What sort of conditions prompted you to redesign the work done by the dudes who designed the car?

[Lunatic]

Originally Posted by Tromatic

My condolences to your car. Fitting user-name as well! What sort of conditions prompted you to redesign the work done by the dudes who designed the car?

Let engine heat escape. works really nice.
I got BRZ inserts, cut them out and installed gold painted mesh to match my gold wheels. I'm very happy with the results.

[wheelhaus]

Originally Posted by Tromatic

My condolences to your car. Fitting user-name as well! What sort of conditions prompted you to redesign the work done by the dudes who designed the car?

The outer fender is the cosmetic surface you see, the plastic inserts are another cosmetic item (they even look like a vent, but are nonfunctional). Behind these inserts is a part of the fender that walls off the engine bay. Cut a hole here, install vented plastic inserts, and you now have a new path for heat to escape the engine bay. Works quite well from what I've read, and exterior cosmetics are unaffected (depending on the inserts you use). Water ingress behind the exterior fender skin may be an issue, but I haven't researched that far.

[Tromatic]

Originally Posted by wheelhaus

The outer fender is the cosmetic surface you see, the plastic inserts are another cosmetic item (they even look like a vent, but are nonfunctional). Behind these inserts is a part of the fender that walls off the engine bay. Cut a hole here, install vented plastic inserts, and you now have a new path for heat to escape the engine bay. Works quite well from what I've read, and exterior cosmetics are unaffected (depending on the inserts you use). Water ingress behind the exterior fender skin may be an issue, but I haven't researched that far.

All very nice. What overheating problems are you and OP having that you need to do this? Post oil temps pre and post mod if you have them.