I've been chasing this KR for a few months now and I'm all out of ideas. I'm pretty confident its false but I'm hoping some one here can help me out. The build is a 249" girdled 109 with 6.35" rods and 9:1 compression It has GN1 heads, 212/218 hydraulic roller, scorpion rockers and a twin scroll Borg Warner EFR 8374 running on e85 with 160 lb injectors. Every thing is managed by the SD2/Powerlogger. No matter where I set the boost (10 psi or 25 psi) or timing (17-21 degrees) I still get KR. The weirder part about it is that it doesn't always do it. I also noticed that rolling into the throttle seems to reduce the knock rather than just stabbing the throttle. I've done all the basic checks to make sure the exhaust isn't hitting etc, and motor mounts are new H&R's. I've replaced and properly torqued the knock sensor and even tried several different ESC modules. The ethanol content is 75%. I'm attaching a recent log in the hopes that someone has an idea of what this could possibly be. Thanks in advance for y'alls help.