Hello,

So I am running into little problem with knock on the 1990 Corvette I am working on. The motor is a fresh rebuild with the factory cam advanced 2 degrees, ported heads, tpis miniram, and all the bolt ons. I have been working with Tunerpro RT to try and get it dialed in and so far I have been very successful. I was initially getting knock when tuning WOT, but the problem was apparent by the fact that my injectors were maxed out and I couldn't get any better of an afr than mid 13's at WOT. I just dialed in a set of ZO6 28lb injectors and the car runs great at part throttle but I am getting heavy knock at WOT. I have my afr set to around 11.3 to start and I am getting knock at just 18 degrees? I am running a normal compression ratio, stock plugs, plenty of fuel on tap... you can hear heavy knocking. I'm really lost, let me know what you think

Dan