[CSG Mike]

Originally Posted by fooddude

I remember 10+ years ago, many people used to "prop up" their hoods (and also remove the rear part of hood liner/seal) (example pic below), for supposedly better cooling. I actually did this on my old EG and S13 haha (yes, I'm a ricer); but Idk if this truly helped though (I only DD'ed, dragged and drifted my cars before ...so, I never really ran the cars hard enough for extended periods like you would on a circuit track, to see any real temp differences). I simply used new longer ss bolts and stacked up ss nuts inbetween the hood and hinges to give me about an inch of "prop."

Would this effectively/noticeably help keep engine/oil/coolant temps down on track days?

I wish there was some kind of a&b test (any links?) with hard data/numbers, of non-prop vs prop, that could prove this helps while out on the track. I'm sure it would be a simple test nowadays, with so many people logging and keeping track of their temps during sessions.

You know how muscle cars have hood cowls? The cowl is there cuz it sucks in air there. By sucking in air there, you're decreasing the amount of air going through your radiator, which in turn, decreases your cooling.