So, did some logging at the base tune I was running on wasn't bad at all. This is basically just a LQ4 tune with 12.5% added to the MAF table above 5000 Hz. AFR is around 11.8-11.2 at WOT with 24-25 degrees of timing. Thought it was going to be real easy to get it dialed in at WOT, but the AutoVE doesn't seem to be accurate at all. I put it into SD mode, got several really nice logs (blew through 1/4 tank of gas) and the end result was an AFR in the mid 13s at WOT I set it up to run 12.8 at WOT in open loop. It seems like the BEN correction factor is overshooting the target AFR? How accurate have you found the autoVE to be?

I'm attaching some tunes/logs. First is the base tune along with a log for it. The next tune is the SD tune, basically just 12.5% added to the VE table along with 12.8 commanded AFR. The first log for that tune looked okay. Log3 is the result of 2 successive logs with autoVE BEN correction factors made to the VE table. End result was AFR in the 13s. ???

Thanks for any help.

 

I run exactly what I command using auto ve tuning. I also have a custom os 3.

 

Do you have power enrichment turned off while doing this?

 

yes..

 

what wideband are you using? maybe it's not sending the right signal? Make sure it's grounded good.
Mine is always off by .3 ish so I just +- 1-2% at a time in the cells it's off until my wideband is where I want it to be.

Edit: LC1 I see it.

 

You've only hit 20-24 cells each time. May just take a bit more time in that range to get accurate.

 

Got it all figured out. In the AutoVE tutorial they don't have you disable B4206 for some reason, which is necessary. Interestingly enough, BlackGMCs tutorial seems more accurate.

Fueling is looking really good right now. Now I just need to play with timing. I really have to wonder how much there is to gain going up from 24.5 degrees. The track might be an ideal place to test that. Stock injectors are maxed out BTW.

Regarding 1st gear, it's almost impossible to tune this on the street 1) due to all the wheel spin and 2) the stupid trans shifts out of 1st even if the gear selector is kept in 1st. Is there any way to prevent this in the tune or is this purely a mechanical thing?

 

I can't remember but I think I just used 2nd and 3rd as the gear itself doesn't matter. All that matters is you hit the cells.

 

Damn, is it just me or does changing the timing really affect the AFR? I added 2 degrees at WOT and the thing really went leaner. I think this thing works well with 24-25 degrees. With 24.5 degrees, EFI live is showing 390 flywheel HP, and 438 delivered engine torque.,

 

Yes, timing will have a direct affect on your AF ratio...btw, I'm running 29*...