Like is says. Installed a cam/headers on a 17 LT1 Camaro. Cars seems to drive fine and was dialed in on the street. Idle still needs a small tweak but its getting there. Cam is a VVT3 TSP cam and as soon as it passed 4k at wot the knock enters and rises. I turned down the sensors a bit and even changed to a cooler NGK Iridium plug. Still knocks and isn't making the power I was hoping for. You can even feel it chug a big up top. Any one else run into an issue like this? I'm hoping the chugging I feel up top is all the timing being pulled. We are seeing 12 degrees of kr by 5600rpm. Before 4k nothing. Car doesn't seem to be misfiring. Plugs and wires are good. Car is entering pe and seeing a 12.76afr and the afr error looks great. Timing is around 15-20 but when I pulled timing it didn't change anything. Any ideas?