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Old 12-31-2012, 11:00 AM   #2
Scooby Newbie
Member#: 316613
Join Date: Apr 2012
Chapter/Region: RMIC
Location: colorado
10 sti


i tend to always pick up some knock sum. more so on #4 mostly in part due to the location of the knock sensor being closest to #4, i havent had timing pulled though. i do watch feedback knock to see when and where timing is getting pulled, and its my understanding that there are some times when its more prone to happen, starting off from a dead stop, shifting gears, and rapid throttle changes, along with boost onset. from what i've seen most would agree thar -1.4 isnt a big concern and i believe cobb says up to -2.6 is acceptable. i do know the one time you dont want to see this happen is under load with higher boost, as this can spell disaster for the motor. before jumping to the ringlands there may be some other possible causes for knock. i start with the easiest and work down the line from there. intake tract leak (vaccum leak) check all hoses are in place and in good shape, check that the maf is clean, check the front o2 sensor, or if you want to rule out ringlands you can do a leakdown test, to save time and energy you may want to start with #4 since that cylinder is #1 suspect in these cars. hope this might help. kinda suprised your tuner isnt sorting this all out, that is what he gets paid for
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