pinging

[HighPlainsDrifter]

hi,
Comp grinds their cams 4 to 5 degrees advanced so it is too far advanced when installed straight up. Get a bushing kit and retard the cam 4 degrees.Also check the total advance of timing at 3500 rpm, it should be 32 degrees. You can put a advance limiter in the distributor if needed.
Perry.

[blykins]

Originally Posted by HighPlainsDrifter

hi,
Comp grinds their cams 4 to 5 degrees advanced so it is too far advanced when installed straight up. Get a bushing kit and retard the cam 4 degrees.Also check the total advance of timing at 3500 rpm, it should be 32 degrees. You can put a advance limiter in the distributor if needed.
Perry.

Hold on a second now....

A camshaft installed straight up means that it doesn't have any retard or advance in it at all. Comp Cams does grind most of their stuff 4 degrees advanced. You can adjust it with the timing set from there. Installing it straight up wouldn't be too far advanced....

Also, a "bushing kit" is a Chevy thing.....not a Ford thing.

Different engines need different amounts of timing. A 3500 rpm total ignition timing rpm is a band-aid for what's wrong, and in reality will make the car extremely lazy. Cobras need a 2500-2700 rpm total ignition timing rpm.