I did a search and found some similar questions but no actual answers.
WOT, Audible knock heard from around 4800 to 6500rpm. Zero KR on the log.
At first I though rocks flew out of the rear tires and hit my dyno room door. But the second time it was obviously knock. It's a rapid fire of multiple knock events so I can only assume it's on multiple cylinders.
The car is an 05 CTS-V.
Kooks Headers with High flow cats
Other than that it's stock. Plugs are only 8k miles old. New wires, new MAF, new O2's.
Is it common that the Knock sensors don't pick up knock?
By the time you guys look at the tune and log, I will obviously have already lowered the timing dramatically. I was just trying to figure out if this car has bad knock sensors or if there is something I need to know about the knock system on this car under WOT.