I've done some searching, and most people who've increased dwell haven't noticed any noteworthy gains. However, since my engine (blackbox L31) is apparently rev limited by the dwell values, it stands to reason that I'm losing a bit of top end pull to crappy dwell values. I've seen claims of people who installed the '02 Express van PCM claiming more top end pull. I looked at the dwell values of the 2 and the blackbox actually has a longer dwell time than the Express van's stock tune. Has anyone ever set the dwell on a single coil V8 before? Seeing how it cuts the engine off around 5600, I figure it's gotta be hampering performance as I near my 5000RPM shift point. The first one is my blackbox table and the 2nd one is from the Express van tune.