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Old 09-24-2021, 09:52 AM   #87
danhr
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Drives: 2016 Camaro 1SS A8
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Quote:
Originally Posted by cjperformance View Post
Ok... big temperature change between Monday and today, so hard to compare seat of the pants feel. Obviously feels much more powerful today at 64 deg F instead of 88 degrees, so not quite an apples to apples comparison.

Updated the enable torque tables. PE is now occurring throughout the full RPM range at WOT... or 70% and higher...

Couple of things. Inj pulse width ms is around 5.8 AND there's still some knock retard in the upper rpm range.

Looking for input on how to approach.

Option #1 - Increase PE for that range... try to get closer to .82 lamda. With inj pw already at 5.8... not sure how much further I can push that.

Option #2 - Pull timing from the base table at those rpms/load.

My thoughts... since I'm a noob... start by pulling timing by 2 degrees at those rpms, may actually get more power if I'm already past the peak supportable ign timing? Pulling timing cant hurt at least. It's safe.

After the above, verify if KR goes away.

If yes, then maybe modify the PE tables to increase enrichment by a small amount... maybe .5%??? Not sure what the effective relationship is between a .5% or 1% increase to the PE tables will have on injector PW. My understanding is that above 5ms is "a lot", but could maybe push to 6.2 ms if the SOI is already adjusted (based on input I've received)

Procharger modified the SOI, but not sure if it was modified enough to support 6.2ms inj pulse width.

So... asking myself, what am I trying to get out of this right now???? I think I need to be happy with the power level, whatever it is at WOT until I upgrade fueling.

I want to change a few things so its safe, but effective. Feel like I'm close. With the Knock Retard showing its ugly head, I'm probably at the limit for timing at WOT. Earlier in the thread it was mentioned to zero out the static retard. This was done in the canned tune, so we are good there. I have to think its real knock, and dangerous.

Other than that, would like to "brighten up" the part throttle feel. Thinking I might be able to do that with some small timing experimentation in the part throttle ranges.

Attached a shot of a section of the log. LMK if anyone is interested in seeing/knowing more. My goal is to help others in the same situation.
From my eyes, it looks like you are hitting torque management and your knock is the computer pulling timing to make the shift

and you are running out on your low side. (this could also be a reason it is pulling timing out)
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2016 1SS A8: FBO + Circle D + P1X + Meth + Tuned by Pray Performance

Stock Longblock

800 SAE rwhp. 9.4 @ 145 mph.
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