Help, I either need new engine or new knowledge!

[mr.prick]

Did you just lower the knock rate?
LOL there is a lot less KR now.
I was wondering if the KR sensors were bad.
That #7 plug is discolored because of how lean you were running overall.
#7 is know to be leaner than the rest,
it tends to be the one that gets BBQ'd.
If you have the stock pistons still be thankful #7 didn't disintegrate.

On a side note I feel that tracking {B5913}/{B5914} with
DYNCYLAIR_DMA is better than using DYNCYLAIR or CALC_CYLAIR.

[kwhiteside]

Hope this is good enough

[joecar]

...
Ken, unless I have a few things backward..when in PE Mode your Commanded Fuel will be the richer of B3605 or B3618 when below 4000 Rpm's. Above 4000 Rpm's, B3618 dictates your Commanded Fuel.
...

My understanding is that the PCM uses the richest AFR (or EQ) from all tables that are currently active...

i.e. when PE is enabled, then the richer of B3605 or B3618 regardless of 4000 rpm.

Is the 4000 rpm from B0120...? B0120 sets the thresold between MAF/VE or MAF only operation for calculating cylinder airmass, and is not related to commanded AFR.

[kwhiteside]

Did you just lower the knock rate?

25% lower knock sensitivity
8 times faster recovery

PE Richer

Timing actually bumped up after 4800, but I never got there on the streets. I don't stay at 100mph but for a second or two during tuning sessions. Paranoia you know.

TR6 plugs

[joecar]

The ring flutter problem is causing large oil consumption and this is a problem (oil entering CC via rings) in that it lowers the effective octane and causes burnt oil/carbon deposits which glow when hot (which may increase CR a little) all of which promotes preingnition/detonation.

[joecar]

I'm running a FAST92 Intake so I'm not sure if those ribs exist?

...

I don't think the FAST allows the early LS1 steam pipe system...

You might consider installing a steam crossover tube at the rear and plumbing it to the front corssover tube (which exits to radiator neck).

[WeathermanShawn]

Ken:

I take my LTFT's as indicated. I then adjust Table B5001 by the same percentages.

Wherever I have 0.0 LTFT's, I know I am in PE Mode. I then filter (WOT) the following MAP(s) to determine what frequencies I am in PE Mode. So, if I am off by .3 AFR..that is about 1%. I.E., my PE AFR Error is usually within 1-2%, so the I am simply 'eye-balling' my logged WOT AFR against my MAF Frequency in PE Mode.

[joecar]

#7 plug looks good, looks like it's cleaning itself... I can see oil on the inside of the steel shank... is that what I see...?

[kwhiteside]

My understanding is that the PCM uses the richest AFR (or EQ) from all tables that are currently active...

i.e. when PE is enabled, then the richer of B3605 or B3618 regardless of 4000 rpm.

Is the 4000 rpm from B0120...? B0120 sets the thresold between MAF/VE or MAF only operation for calculating cylinder airmass, and is not related to commanded AFR.

So you're saying if I hit the PE rpm/throttle position threshold and even if I'm at 3600rpm, it will drop down to 12.65 as stated in the PE table. That is what I'm seeing.

I still would like to know how to tune when PE is hitting the commanded vs actual.

As for my actaul sometimes being a bit higher then commanded when in PE mode, please not that I'm running a LS2 90mm TB instead of my stock 78mm. Mabye my multiplier isn't perfect. From the tuning process MAF should be very very close, but PE table has never been tuned at all, as I don't have a clue how to do that.

[joecar]

I just couldn't help myself guys. I flashed the tune and went for another run. I'm very surprised what a difference it made. My new tune and recent log attached.

I could go a little richer on PE if necessary. Any other suggestions welcome. Of course the goal is to get my timing back up to 22 degrees area.

Ok, big difference... what did you do...?

Yes, go a little richer as suggested above.