Quote:
Originally Posted by carmine
Hello Dan.
Get rid of the composite gasket and replace with layered aluminum heat shield kit from Mr gasket.
I have tried same as you with composite gasket and aluminum shielding of bowls with minimal results.
The Mr gasket shielding eliminated the problem completely.
Heres the link; Mr. Gasket 3712, Mr. Gasket Carburetor Heat Shield | Mr. Gasket |
Do you know how tall the gasket stack is? I only have room for a hair over 1/4 inch thick base gasket because I have a smooth hood. I considered the Mr. Gasket heat shield set up but with dual carbs and all the accelerator linkage and rear mounted breather I thought I would end up cutting the shields up into pieces.
Gaz64 - I haven't looked but I suspect it has the rubber umbrella seal in the accelerator pumps. On another forum someone suggested taking a dremel and grinding a very shallow grove from outside the umbrella to the relief hole under it. The theory was that it would allow vapor pressure to vent back to the fuel bowl and bowl vent but would seal off when the accelerator pump was activated.
I haven't had a chance to look yet but I wonder if Holley makes a composite accelerator pump cover that doesn't absorb heat so easily?