Quote:

seen in a post by Ryan,J ,that He found the Indy small block heads liked lots of timing(38-42deg,s) something like that. Wondering if anyone has tried this on the track with any results.
Jim.



My old hand ported -1's made best power at around 33-34 degrees of timing. My CNC -1's seem to like 38-40*. Im guessing because they have a much larger chamber. Usually a more efficient chamber requires less timing so Im not sure why they like so much timing either but that seems to be the case with my heads also. My chambers are still 67cc's after being milled .030 and my old chambers were 57cc's.