[torqhead]

Originally Posted by 69 Limelight

I don't see how what I'm about to submit could possibly be because it was gone over by builder and went through dyno cell but, is there any possibility that the cam is ground with a 7-4 swap and therefore the firing order would be 18736542? The cam I currently have is a 7-4 swap and if I hadn't asked when I ordered it from cam company I wouldn't have known. No where on cam card or paper work does it say such.

Back on posts 719, 720 & 730 the posters are confident it's spark knock and proper timing would get rid of knock.

At this point seems like everything has been checked and something's double and triple checked as well as a lot of parts replaced and money thrown at it by owner and not much left so I'm throwing it out there. 18436572 firing order when it should be 18736542 would certainly make it shake and run rough like it does.

I thought of this earlier in the string, but I would think the builder would have that on the build sheet and assumed it would have been brought up by now. Anyway at this point, good to bring up everything!!! Reminds me of a pontiac motor I helped someone with recently it was popping out the exhaust regularly. It had two plug wires swapped.