Learning to tune

[Fastcp]

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.

 

[Swiggles]

I

edit: I guess kr without boost can happen even without power enrichment.

Naturally aspirated cars get knock too

 

[SgtMarshal]

Naturally aspirated cars get knock too

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.

 

[CrazyGuy03]

No. A few locals here with n/a Regals had kr like crazy

 

[Scottydoggs]

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.

you also have ported heads and a cam with low compression. not the same animals

 

[WarStryker13]

I had ~5° kr at 48% throttle with my stock tune... Lol

BTW thanks again, Scotty.

 

[Swiggles]

My wife's ok gets about 7 and its all stock. Overkill Pcm gave it 14*.

 

[Mitch R]

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.

 

[Mitch R]

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.

 

[SgtMarshal]

My wife's ok gets about 7 and its all stock. Overkill Pcm gave it 14*.

any idea what was in the tune that caused the kr?

 

[Swiggles]

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.