by Richard Miller » Fri Apr 22, 2016 12:59 pm
I agree with Paul Beck ,,my problem was noticeable when dropping off the freeway and the car wouldn't idle at bottom of the ramp . my car is typical of many members cars with front radiator hot air exiting out of the bottom and blowing on the stock fuel tank ,then fuel line running with radiator lines thru tunnel , to a mechanical pump right under the header pipe , and up to the carb sitting on the hot manifold and drawing hot air from the enclosed engine compartment ,, whew ,,, insulator under carb and a cold air box drawing from interior cured my drivability issues but I am not done, while investigating the problem I installed a drag race cool can in rear and ran fuel line back thru it just before going to carb,,,, packed with ice a 5 mile 15 minute drive melted ice and made warm water. lot of heat getting into the fuel .
I am changing my radiator to exit thru hood , for several reasons (reduce front end lift , add A/C cond , replace heavy brass unit with aluminum , AND not blow hot air on fuel tank) I will insulate radiator lines and fuel line , electric pump up front , and have been considering a return type system for fuel pressure control , a 6 valve mechanical pump while cruising at light load freeway speed down hill pushes fuel pressure up to 12 in spite of the regulator .. so anything you can do to keep fuel system cool will help .. I am using edelbrock currently . used holley and a thermoquad (which got good MPG -- 19 mpg )
Richard Miller
West Covina, Ca
'65 V8 Vair