Vented Hood Water Question

dP3NGU1N

The headers are producing the most heat, they're too far forward to cover those.

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theDreamer

Yes and no.
The venting of the headers is probably a very difficult task, hence why most ceramic coat and/or wrap them to just push the heat farther down the exhaust and keep engine/header separation as much as possible.

Now there still has not been any 'real' data provided on the 370z of where our high heat points are, pressure zones, and what venting certain areas actually do. From just slapping on a Seibon TS hood and doing some pre-vented hood data logs and some post, I have seen some solid temp drops or better temp management. The other result I have notice is my most forward vents extra the most hot air, while the farther back ones do very little (I am sure they help but not as much as the front).

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wheee!

I agree with the above posts. My centre vent just pours out the heat.

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JWillis72

The back two vent on the hot wheels hood are useless as they are over the brake a battery box so I covered mine with lexan. The front 4 helped my oil temps greatly, it used to climb fast any time I stopped but it's very slow now and as soon as I start moving it starts dropping. They haven't been tested side by side so no one knows what hood works best on our cars but I promise you it's not a show piece, if it was I would have already replaced it!

synolimit

Lol but you just proved my point. It is a show piece. You've already blocked off the back two going from a show piece to a more function piece. And it doesn't matter where the vents are in stopped traffic. Any vent on the hood will keep temps from climbing to fast since there's no movement of air when stopped, heat WILL pour out as hot air rises. The important thing is when moving does it work? With the back two blocked off I say yes.

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13 370z-

wheee!

The jpr hood comes with drip pans installed under the side vents, basically cuttting off air flow thru anywhere except the centre vent. I opened mine for better venting at stops and idle. Racers might want to keep them covered for maximum extraction from the centre vent.

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JWillis72

Ok so I guess the lower temp are in my imagination? I'm not saying they didn't add the third one for looks but my car runs cool in south Florida summer and that's a fact not opinion. If large vents don't work why did it bring the temps down? I ran the car at Sebring a few weeks ago where temps were in the high 90s and 85% humidity and when pulling in the pits you can see the heat coming out the vents like a hot asphalt road. While heat rises the size of the vent still controls the volume that can get out.

synolimit

Not sure why you had to say this. I just said "I say yes." When moving I say yes with the back two blocked off it will work. It's not your imagination since I'm agreeing with you but only since you've modded the hood will I agree.

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13 370z-

JWillis72

This is the other side.


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JWillis72

A center vent would have done nothing for my car because the the intake pipe for the Stillen supercharger would block it from flowing any air.

wheee!

That is a reasonable observation.

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