Interesting discovery

[Rich Kinsley <rlkinsley@xxxxxxxxx>]

Rich Kinsley '64 Dodge Polara 4dr 318poly w/goodies

Last night at cruise night I ran across a young man with a very nice '66 
Ford running a 429 dual-quad engine. He has the same fuel pump and the 
same pressure regulator, Holley blue pump and Holley reg.. He is running 
a return line to his tank which is the only difference. He is having the 
exact same issue that I am right now. When cold the pressure is right on 
6.5psi. As the engine warms the pressure begins to drop off and later 
winds up about 3psi. If you reset it the pressure will be 7.5 or higher 
when it's cold again. I tried another same model pressure regulator that 
I have with the same results. This is the regulator that came with the 
pump. 

I'm thinking the spring or ?? in the PReg is changing with the temp from 
the heat??? I will test this theory by installing a plastic milk bottle 
around the PReg after the pressure drops and filling it with ice. If the 
pressure rises I suspect the PReg is too hot and is the culprit. Maybe 
there is a different style PReg or at least I can insulate it.

The young man's car is also exhibiting the occasional dying and hard 
starting that I have experienced. He suspects the coil. Dejavue.

I was also told last night that a guy said the MSD and Accel coils must 
be installed vertically or they will overheat. Mine is angled downward 
about 30deg and does get hot. I can spin it vertical and see if that 
helps too.

Whadda ya think??? 


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