does not sound good to me, wonder how hot it is getting in that ?enclosed ? space
on a hot day all those sealed fuel systems will build vapor . i forget the vapor pressure of fuel but its not so high
hot gasoline , humm one hopes there is a pressure relief that will vent it before the tank ruptures
foil would be ineffective as heat shield.. some of these products would be effective
https://www.pegasusautoracing.com/gr...pID=HEADERWRAP
This short 15 foot roll will cover a single 1.5" diameter pipe about 38" long, or a 2" diameter pipe about 28" long. It's also a great size to keep around for emergencies.
https://www.pegasusautoracing.com/gr...ID=HEATBARRIER
Adhesive Backed Aluminized Heat Barrier Cloth can be used to protect composite engine cowls, hoses, wires, painted surfaces, or any component that may be subject to damaging radiant heat. The Heat Barrier is made of woven silica with a flexible aluminized finish. The highly reflective surface of the material is capable of withstanding radiant temperatures in excess of 2000°F.
wrap the pipes adjacent .. apply the barrier cloth to the tank adjacent to the pipes
cooling air ..
set one of these ducts in the belly pan , put air ducting hose on it .if required
https://www.pegasusautoracing.com/pr...p?Product=3627
good luck