Ok, I'm getting kr on my scan master on 93 octane gas with low boost. I went to the local track and mix 3 gallons of 110 octane with about 2 gallons of 93 octane and got 0 knock going down the track. I have a Jay Carter 93 street chip for my car for the 009 injectors. Should I look at getting a diffenent chip? If so which one? I can't seem to get rid of the kr and was wondering if the chip I have could be the problem. I had some lifter noise on the RH bank so I installed a new camshaft, lifters,rocker arms and springs I also installed a new timing chain and gears along with the chain damper. (I thought that was my problem as my chain was very loose) I've checked all the vacum hoses for leaks and did not find any, I've installed a new EGR valve and the solnoid for the EGR valve and still get kr. I also did a compression check and all cylinders were between 115-125. Any ideas on what I should check? Also what should my BL number be at idle? I had the fuel pressure at 42#'s and it would be in the 90's I cranked it up to 48#'s now it mainly stays above 100 at idle. Was just wondering if it was running lean when under boost and causing the KR, The BL's under boost are in the upper 130's to 140's. Thanks, Jason