[CY-Mach1]

Originally Posted by Ricksterman

Here is the last run (with all the mods) before and after the tune. A/F leaned out a bit and timing of course advanced substantially.

Your curves for run 39 are flat. Mine are shaped more like your run 32. Do you think the custom predator gave you such flat curves?

Interesting you have your best run w/ AFR around 13.5; Most of the threads I've read say the 4valve motors like AFRs in the high twelves. Mine made best power w the AFR in the 13.3 to 13.5 range. Running r50c I have finally been able to effect timing timing and control fuel. My timing curve is opposite of yours for a 4th gear pull. It starts at 19 and climbs to 21 (most of the time). fyi - I am seeing more timing in 1st and 2nd gear while it is much more variable in 3rd and 4th.