[aerohead]

I feel that the residence time,between when the air first enters the intake snorkel,and then passes into the throttle,is so brief that any heat flux which might exist under the hood simply would not have enough time to impact the charge density of the air/fuel mixture.You could calculate this and compare.-------------------- Dr.Morrelli's work at Pininfarina required extensive windtunnel time to develop proper engine bay discharge duct architecture.My opinion is that something as primitive as raising the trailing edge of the bonnet could exacerbate flow conditions and lower performance.Not an easy call!