Sorry bumped the submit button!

In any event the theory seems to be plausible in my case given the greater noise and vibration from the engine increases with RPM. I would imagine in your case considering you have a whipple supercharger installed ( i have also purchased one and waiting on the guy to ...

I am having the same trouble on my 2015 Jeep GC SRT 6.4. i run 98 octane fuel. i have installed the diablosport 93 octane tune, car has only had CAI, headers and magnaflow exhaust installed. i also get KNK ST retard pulling 5 degrees from 3800-6000rpm under medium load.

My research leads to a false ...