Gents,
Don't have much time to write now. I am off to the in-laws and any moment I will be caught...
George...I have been thinking about a leak around the gaskets. It is a Blue Thunder intake with a turkey pan. Lots of areas to leak.
Distributor phasing 101
The MSD can fire from the trailing edge of the rotor, or the leading edge of the rotor. The rotor spins counter clockwise in the engine when running. If the trailing edge of the rotor is burned, then the rotor is firing on the trailing edge. It should be firing on the leading edge. This roughly translates to 40 degrees of timing either direction (depends on which way you are looking at it). You need to switch the wires going to the distributor and retime the engine. MSD blames Ford for the problem. Strange some of them are phased one way and some are phased another.
The engine will run with the distributor phased backwards, but the rotor and cap will only last 1000 miles. Mine were trashed at 500 and the engine slowly quit running at high RPMS. I thought fouled plugs were the problem until I talked with the engine builder and he suggested the phasing problem. Sure enough, that was part of the problem.
Question:
How do you tell the difference between a Holley 750 and a Holley 850? Any help would be appreciated.
As it is Sunday, it is a day for driving and not for autopsy work. Save that for tomorrow and I will tell you what I found. Any suggestions on how to find a vaccum leak in a carb gasket?
David
