Engine pinging? what to do??

LAR_414 - Apologe accepted - and I will be the first to give you mine if I took your post incorrectely. That is one thing I hate about a email type post - tone is impossiable to interject into the message.

When I made the statement that duration will effect dynamic compression, it was directed more toward cam choice to start with when building a motor. A long duration cam with marginal compression is normaly not a good choice, since it will contribute to the marginal compression issue.

I consider 900' sealevel. Our altitude is 4500', so compression choice and cam duration become very critical for performance. A good day is 6000' adjusted, most of the time we are racing at 8200' adjusted and above. It is very hard to build a motor that will run at this altitude and still let us travel to a sealevel track without changing the motor. Which can be a chore in a door slamer

I am glad that young guys like you are involved with old Mopars. It seems that the Mopar thing is getting to be a old man thing. Again I will say that I am sorry if we got off on a wrong foot here. If there is anything I can do to help you and your efforts, please let me know.

Earl Helm
Crew Cheif
Mott Motor Sports BA/FMD