[Fred]

I am running a fuel injected, supercharged 302 in the Cobra. I just changed the heads to new Brodix heads. The problem is the motor will run like crap and is difficult to start with the base timing of 10 degrees advanced. Setting the base timing the old fashion way by listening and short tests drives, left me about 18 degrees advanced. I am not detecting any knock with the knock sensor.

Any ideas why the motor prefers the timing to be advanced this far? It ran great before the head change at 10 degrees.

I can set the base timing at 10 and re-write the spark advance tables in the computer. Would this be a better idea than setting the base timing to 18 and leaving the tables as they are?

Second question is how high does a late model 302 rev before blowing apart? The valves in my old heads would float about 6400 rpm. I forgot to reprogram the rev limiter after making some computer changes and really over-revved the motor. It is still together and I do not want to set the rev limiter to low.

Any comments or pointers would be appreciated.

Fred