Originally posted by davew:
Brent,

if Zydyne is 500-800 rpms, what is the granularity of the stock ECU program?

-davew
The 500-800 rpm was a guess from memory, I have since returned the unit to its owner. As far as I understand the granularity of the Zdyne is the same as the stock. I would think that you would need finer granularity (is this really a word) in order to fine tune for a sizable HP increase.