And this goes away with stock pcm right? So we can rule out plugs and wires and things. My guess is they may be shooting for too much timing and the pcm is pulling a ton of it right back out due to KR. The most KR the pcm can pull to fix knock is 15 degrees. The most I would be expecting the pcm to try for would be 18 or 19 timing but if they try to shoot for something like 25 detonation will cause the PCM to pull as much timing as it needs to fix the KR which can feel like a limiter (in fact thats what the limiter is)
BTW a fellow COCGP member went through 3 engines with his DHP until it was found out that the PCM was asking for 30 degrees of timing so I would be careful pushing it until the car is scanned or you go back to stock pcm.
OK, now you're getting me worried.
If I send out the DHP to Intense for a reprogram, I'll never get it back in time for the Albany meet and drags coming up in a few weeks, and I really don't want to go back to the stock PCM...
So you don't think that this is the torque management kicking in