@Haulin200sx Just wanted to let ya know I tried the 53j MAF bin on a 10:1 SR20DE, stock cams, 2.5" exhaust, SSAC header and POP charger. I had noticeable pinging around 6500-7500 RPM, tried with the base timing at 15 and 17 degrees. I'm running 93 octane fuel. Unfortunately I don't have my wideband installed yet, so I can't give you any AFR readings.