See the attached log. This was happening on the dyno, and is super obvious when it's happening. You don't feel it on the street so much unless you're in 4th.
Anyway, when going WOT below 2000rpm, you can feel the car start to shake, get worse, then get better and totally clear up by 3000rpm. You can see the knock retard spikes make a bump that peaks around 2500rpm... If you punch it from 2500rpm, the spikes peak out immediately and decay down. I backed out a TON of timing, and it was still doing it.
I have a hard time believing this is actual knock, and it wasn't torque management. I have absolutely no idea what is doing this.
The cam is a 231/239 0.624/0.624 on a 113 LSA, and the car has Dynatech headers and a Callaway Honker intake.
Any ideas on what the hell is causing the KR spikes? I have never seen this before.