LOST 10mph AND ABOUT 6 TENTHS

[monte8616]

Originally Posted by Chuck Gallagher

I agree, grounds are most likely weak.
Run a redundant ground wire from the side of the engine block back to the battery ground. Or, if your ignition box is inside, as most are, to the ground that is common with the ignition box and battery.
Use a good size wire and a star washer under the connector at the block.
Also, if you don't have a good size ground wire from the box to the battery negative post put one in.
Grounding to the chassis is always a crap shoot in a race car and the root cause for the majority of electrical problems.
Good Luck
Chuck Gallagher

Thanks so much! Think we will be taking this car apart almost completely to check it all out!!