The 370Z Weight Reduction Thread

[cavemancan]

Originally Posted by wstar

No measurements on the plastic removal, just common sense. Anything that gets more air exchanged out of the bay has to drop temps in there, same idea as hood vents. FWIW, I removed the engine cover, but left the upper stuff all in place. I like the little bit of shield it gives to the two corner compartments from heat (brake master cylinder in one, and I have my PCV catch can mounted in what used to be the battery area - if it stays a little cooler than the surrounding stuff it condenses better).

See this is why I am inclined to disagree. By removing the plastics next to the window you are not exchanging air out of the engine bay. You are effectively pumping air into the engine bay. Since air is already being fed into the engine bay from the front bumper I am not sure how the air is flowing here but it has to go somewhere. You might even be causing lift at high speeds due to the excessive air preasure in the engine bay which might be forced under/behind the engine then under the car.

Can you post a pic of your engine bay plastics? Just curious how you have it setup.

Thanks!

Chris