Quote:
Originally Posted by COcyclist
Is there a high pressure fuel pump in the tank? This has largely removed vapor lock in modern cars. Also I believe there is a return line so fuel should always be circulating to the tank, helping keep the lines cool. Insulate the fuel lines if necessary.
Read up about rear diffusers. Ideally the rear 1/3 of the full belly pan should taper upward slightly. Aerohead has suggested 5 degrees above horizontal is best for low drag. This reduces lift and drag and helps fill the rear wake.
Belly pans from the manufacturers leave the exhaust uncovered. This allows heat to escape while giving much of the benefit of a belly pan.
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From Hucho's reporting of Carr's research,the 'long' diffuser,@ 2.8-degrees upsweep angle would provide the highest drag reduction,and if that couldn't be utilized,the 'short' diffuser of 4-degrees would be the next best thing.
Neither diffuser will perform at maximum unless the oncoming flow is optimized.
Some racers will incorporate fiberglass tailpipe/muffler wrap and auxiliary heat shields if necessary,in order to completely cover the belly.