I just converted to the Holley Stealth Ram in my car with a 350 and 224/224 @ .050" cam. The problem I am seeing is that, between shifts, there is a loud pop and a loss of power. I attribute this to the fact that I am using an automatic car .bin and, when driving a manual, between shifts the rpm's and Kpa drop where as an automatic simply rolls over to the next RPM at a constant load. My question is:

What value is acceptable for timing at low kpa values between shifts?

Has anyone else had this problem and how did you remedy it?

 

are you canadian ?

 

This is just my experience, but in my tuning days I noticed if I didn't run enuf timing in the high vacuum areas (20-30 kPa) it would start popping like you described.

I think you might also want to adjust some of the throttle follower stuff to let the RPM "hang" between shifts.

 

Out of curiosity, how much timing was "enough". I would think that the engine would require less timing under no load conditions. Where exactly did this timing come into play (RPM load etc...)