508 or 509 Purple Shaft cam

Just go by the part number. It is P4120233. .508/.508 248.5* @ .050 on a 108 LSA with 76* overlap. I think the MP Performance book even has all of the valve timing events as well, but you can degree it regardless. Just keep in mind that huge amount of overlap. That is what bleeds off cylinder pressure. That's the reason you should run 10.5 minimum compression.

Cool!!! Thanks. I'm not sure what the compression ratio is, but since it ran so well before I'm assuming it was at least 10.5 to 1. I was running 410s but I think I may go with 391s. I think anything less would be useless.