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Trob85 · 05-02-2020, 01:53 PM

Just had my car tuned and ran into some problems the guy said it was getting spiked of knock and running lean also at 6000 rpm the boost would flatten out at 10 psi. No belt slip, no boost leak, good plugs and wires and really good compression. We did a street pull to log data and hit 12.6 lbs of boost and air fuel was 10 with E85. Looked at the log and the spark table read 17 in the 5600 range and at 6000 rpm 20 all the way down and 15 in the next graph. Is that something that could cause knock or even be a reason I’m losing boost at that rpm?

05-02-2020, 01:53 PM	#1
Trob85 Svt lol Drives: 2011 ss inferno orange blown Join Date: Jan 2012 Location: Topeka Posts: 2,312	Tuning question for those with expirence. Just had my car tuned and ran into some problems the guy said it was getting spiked of knock and running lean also at 6000 rpm the boost would flatten out at 10 psi. No belt slip, no boost leak, good plugs and wires and really good compression. We did a street pull to log data and hit 12.6 lbs of boost and air fuel was 10 with E85. Looked at the log and the spark table read 17 in the 5600 range and at 6000 rpm 20 all the way down and 15 in the next graph. Is that something that could cause knock or even be a reason I’m losing boost at that rpm? __________________ plasti dip is not a mod.......and a cold air intake doesn't make you fast!