Just drove to Norwalk Drag today from Youngstown 3.35 pulley DIC showed 29.5 mph that's driving at 78mph. Tune makes a difference.
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09-13-2016
Just drove to Norwalk Drag today from Youngstown 3.35 pulley DIC showed 29.5 mph that's driving at 78mph. Tune makes a difference.
09-14-2016
Naturally aspirated cars get knock tooOriginally Posted by SgtMarshal
04 Impala SS Indy:
09-14-2016
when I was n/a, with an L67 bottom and xp cam I never saw any knock. i'm sure that i'm the exception though.Naturally aspirated cars get knock too
09-14-2016
No. A few locals here with n/a Regals had kr like crazy
09-14-2016
you also have ported heads and a cam with low compression. not the same animals
09-14-2016
I had ~5° kr at 48% throttle with my stock tune... Lol
BTW thanks again, Scotty.
09-14-2016
My wife's ok gets about 7 and its all stock. Overkill Pcm gave it 14*.
04 Impala SS Indy:
09-14-2016
Logged today, results are better, still seeing some KR. LTFTs are closer, max of -10 now. Going to tune the maf some as well as pull some timing where my KR is showing and see where that brings me.
09-18-2016
Well, after some more adjustments including a decent increase in cruise timing, my mileage increased from roughly 28 mpg to 32 mpg highway, confirmed by both DIC and topping off the tank before and after my trip to the cities. Only occasional blips of KR showing up during normal driving, which I'll adjust to get rid of. So you guys were right, I could learn to tune.
09-18-2016
any idea what was in the tune that caused the kr?
09-19-2016
I think it was more tune up stuff and a clogged coolant system that was doing. It was the base shelf tune as far as I know. I have since sold that pcm but have another one that's an 06 pcm that I haven't tried yet.
04 Impala SS Indy:
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