Got a dyno tune. Does this look strange?

[ForcefeedWS6]

Well I took the car out and logged some data to see what kind of knock retard I had. I made some pretty hard pulls and it only pulled 3.9 degrees. That seems pretty good to me. The tuner must have set it up lean at an idle.

[etmotorsports]

What were you dyno numbers?

I don't see any reductions in the knock tables i assume you have aftermarket cam and headers that could be false knock if you have dyno data post it up.

[ForcefeedWS6]

Here is my dyno sheet. What knock tables are you refering to? Do you recommend I leave the timing alone or pull a little out where it showed some retard? Yes, I'm running an aftermarket cam and headers. Thanks.









[attach]11896

[swingtan]

I'd set the low octane table so it was lower than the high octane table for starters.

Do you have any logs you can post?

[ForcefeedWS6]

Here is the log I ran last night. It's long. How much should I drop the low octane table?



[ATTACH]11903

[swingtan]

I usually drop 4' around idle and 8' everywhere else. Others have different ideas but that's what I usually do.

[ForcefeedWS6]

When the ecm sees knock while in the high octane table does it drop down to the low actane table in that cell or just cut timing in the high table? I will drop my low table down some. Joecar said my PE looked a little lean. Wonder if I should try bumping it up just a little and see if that helps what knock I have?

[joecar]

Your PE ranges from 1.1396 to 1.1504... I would make it 1.17 all across.

[ForcefeedWS6]

Ok, thanks joe. What do you recommend on my low actane timing table?

[Chalky]

From what I have read, when you get KR, the tables are blended until the KR disappears. Once the KR is gone, the timing will migrate back to the high table. I have also read that at some point, and this may be ecm specific, the timing will revert to the low until your next fuel purchase. I believe there is a pid to watch high/low octane tables interact but I cannot be certain.

I looked at your log and your KR didn't seem bad at all. It is normal to a degree when going to and coming off throttle. My stock LS7, with no mods, did the same thing. Headers make matters worse. I have tunes on hand for LS7 where some tuners dial back knock sensor sensitivity to cover false KR or KR in general. It scares me.

I think Joecar has an opinion on this subject as well.

Correct me if I am wrong, but your primary pipes merge into one exhaust pipe correct? Always seemed like a real bottleneck to me on F-Body.