Data Logs! Post them here.

[Wayno]

Because you modified the CL scaling, you'll have to continue doing so until it's perfect and you get 0 LTFT in OL.

Originally Posted by JB86'd

@Wayno @steve99 @Kodename47

here's my newest log with the injector scales, UEL load limits, and my custom maf scale (done with injector scales, but before adding load limits). I'm pretty knock free but it looks to be running too lean compared to commanded.

http://datazap.me/u/joshbustos86/jdl...-4-6-7-8-10-13

My custom scale is richer than the stage 1 scale above 3V (where my AFR's were just about spot on without load limits) so I'm now wondering why it's leaner, as I'm not hitting the load limit past 4000 rpm.

here's my maf scale (top) vs stg1 (bottom)

Attachment 122020

[JB86'd]

Originally Posted by Wayno

Because you modified the CL scaling, you'll have to continue doing so until it's perfect and you get 0 LTFT in OL.

SHIT, that's the one variable I failed to realize. I suppose I should just flash my Open Loop scaling and load limits without CL changed, and see how that goes.

[Wayno]

Originally Posted by JB86'd

SHIT, that's the one variable I failed to realize. I suppose I should just flash my Open Loop scaling and load limits without CL changed, and see how that goes.

Or better scale in CL or revert 2.23V to 3V as that's where the last LTFT bracket is I think.

[matchamochi]

poopy california shell 91 gas / visconti tune stage 1 NA

https://www.dropbox.com/s/7damc9wzwa...22-47.csv?dl=0

Fairly clueless -

Can anyone tell me if these logs are fine? Or if anyone sees anything I should be worried about?

My long trim fuel trims seem very high - but I also don't know if I logged properly.

My IAM is .88 at lowest and LTFT is off the bat 16.4 and goes as high as 17.2

I let it idle for a bit and then did a few normal runs and then a few very hard runs.

[Wayno]

Having LTFT = 0 in open loop while it's 17! in areas of closed loop seems to indicate that LTFT has been disabled in closed loop.

I would say that's a less than safe strategy unless the vehicle is personally owned by the tuner himself. And by strategy I mean half-arsed shortcut.

Originally Posted by matchamochi

poopy california shell 91 gas / visconti tune stage 1 NA

https://www.dropbox.com/s/7damc9wzwa...22-47.csv?dl=0

Fairly clueless -

Can anyone tell me if these logs are fine? Or if anyone sees anything I should be worried about?

My long trim fuel trims seem very high - but I also don't know if I logged properly.

My IAM is .88 at lowest and LTFT is off the bat 16.4 and goes as high as 17.2

I let it idle for a bit and then did a few normal runs and then a few very hard runs.

[Kodename47]

Originally Posted by Wayno

Having LTFT = 0 in open loop while it's 17! in areas of closed loop seems to indicate that LTFT has been disabled in closed loop.

I would say that's a less than safe strategy unless the vehicle is personally owned by the tuner himself. And by strategy I mean half-arsed shortcut.

I agree, the OL LTFT seems disabled. However I just sent the log through the tool and all the trims are high around idle and reduce down to near to 0 around 2v. In fact around the OL/CL cross-over area the trims are averaging below 0. Open loop part throttle fueling seems to be hitting the high 12s so that's fine and it's not pulling huge amounts of timing, although it could be worth checking some areas. However I know how proactive JV can be at times....

[DocWalt]

I've got a couple of logs from last week. Besides some low (-6.91) trims at very low load (~.16) everything looks pretty decent to me. Maybe a touch lean until the LTFT stabilizes while at WOT (PI kicking back in changing the trims, I assume), but not bad. I still have no idea what's causing the lean bump, I'm nowhere near the load limit there.

Just some driving: http://datazap.me/u/docwalt/10052015...ta=1-3-7-12-14

More driving, quick 2nd gear pull near the end: http://datazap.me/u/docwalt/10052015...ta=1-3-7-12-14

I need to try and get a 3rd gear pull logged, but it richens up a little at WOT compared to that 2nd gear pull.

[drift86]

Guys, hoping someone can provide some advice on this.

I've got a weird spike in my AFR at 3.2v between 3000-4000rpm where it runs a few points too lean.

The car has a OFT, OFH and a Takeda intake and is running Wayno's v86 tune on United E85.


Log 1: This when I first noticed it. It went up to 14.36 AFR when command was 12.59.
http://datazap.me/u/drift86/e85-stag...zoom=1956-2013

Log 2: I then added 10% to the 3.2v MAF value. It dropped to 13.78 AFR when command was 12.59. Still too lean but heading in the right direction.
http://datazap.me/u/drift86/uel-e85-...2&zoom=488-536

Log 3: I added another 8% to the 3.2v MAF value. AFR went back up to 14.24 when command was 12.59. Not what I was expecting.
http://datazap.me/u/drift86/uel-e85-...2&zoom=158-236


I didn't want to keep increasing this as it seems something else is off. Any ideas? Could I have a faulty MAF sensor?

[Wayno]

You need to increase the load limit at 3800 from 1.0 to 1.1 and return your maf scale to the original smooth one in that area. (See revworks load limits)

Which headers do you have?

http://datazap.me/u/drift86/e85-stag...2013&mark=1977

Originally Posted by drift86

Guys, hoping someone can provide some advice on this.

I've got a weird spike in my AFR at 3.2v between 3000-4000rpm where it runs a few points too lean.

The car has a OFT, OFH and a Takeda intake and is running Wayno's v86 tune on United E85.


Log 1: This when I first noticed it. It went up to 14.36 AFR when command was 12.59.
http://datazap.me/u/drift86/e85-stag...zoom=1956-2013

Log 2: I then added 10% to the 3.2v MAF value. It dropped to 13.78 AFR when command was 12.59. Still too lean but heading in the right direction.
http://datazap.me/u/drift86/uel-e85-...2&zoom=488-536

Log 3: I added another 8% to the 3.2v MAF value. AFR went back up to 14.24 when command was 12.59. Not what I was expecting.
http://datazap.me/u/drift86/uel-e85-...2&zoom=158-236


I didn't want to keep increasing this as it seems something else is off. Any ideas? Could I have a faulty MAF sensor?

[Wayno]

If you're using one of the example load limit tables I posted...

You need to ramp the load limit up faster after 3800.
Change the final axis value in the load limit table from 4400 to 4000.

If and only if the last axis scale is already 4000, then change the value of 3800 from 1.0 to 1.1.

You will only need to change one value, not both.

http://datazap.me/u/docwalt/10052015...4964&mark=4909

Originally Posted by DocWalt

I've got a couple of logs from last week. Besides some low (-6.91) trims at very low load (~.16) everything looks pretty decent to me. Maybe a touch lean until the LTFT stabilizes while at WOT (PI kicking back in changing the trims, I assume), but not bad. I still have no idea what's causing the lean bump, I'm nowhere near the load limit there.

Just some driving: http://datazap.me/u/docwalt/10052015...ta=1-3-7-12-14

More driving, quick 2nd gear pull near the end: http://datazap.me/u/docwalt/10052015...ta=1-3-7-12-14

I need to try and get a 3rd gear pull logged, but it richens up a little at WOT compared to that 2nd gear pull.

[Wayno]

You're using tactrix to flash or openflash tablet to flash? I prefer people buy the tablet and support the devs.

The OFT tunes have none of the ECU safety features removed, the tunes are safe.

You could improve the dip with the EL load limit tables I posted, maybe a smoothed maf scale also which will lean up 3.2 MAFV and after 3.8 MAFV slightly, apart from that it doesn't need work.

http://datazap.me/u/joe-g/4th-drive-...1031-1916-1759

Originally Posted by Joe-G

Just finished gutting my header and front pipe. Also have a grimmspeed intake, but I haven't scaled MAF values yet. Here are some initial logs... Can anyone a bit more experienced take a peak? I know LTFTs are a little higher than 5%, but its not too bad as it is I think.

Don't see any knock based on what I've learned so far. Some FBKC in mid/high load/low rpm/low speed/low gear, but I think thats a normal? AFRs look mostly fine, little rich in some spots (more so near redline) but still pretty good.. is my analysis correct?

Safe tune?

If anyones interested, I will probably have it dyno'd after Thanksgiving day lapping day... I'd be curious to see the gains from a gutted header and gutted front pipe, pulleys, and a OFT OTS Stage 2 EL 93 tune.

The logs:

http://datazap.me/u/joe-g/4th-drive-...&zoom=289-2563

On the following log, FLKC logs -.065 and I noticed it pulled a bit of timing mid rpm, high load, and high speed. Is that acceptable? AFRs look bang on as far as I can see.

http://datazap.me/u/joe-g/5th-drive-...-8-11-15-21-23

[solidONE]

Originally Posted by Wayno

You need to increase the load limit at 3800 from 1.0 to 1.1 and return your maf scale to the original smooth one in that area. (See revworks load limits)

Which headers do you have?

http://datazap.me/u/drift86/e85-stag...2013&mark=1977

Looks familiar, doesn't it? lol My header is back from being re-coated. We'll get to the bottom of this lean spot.

[Wayno]

Originally Posted by solidONE

Looks familiar, doesn't it? lol My header is back from being re-coated. We'll get to the bottom of this lean spot.

I posted examples only, for the very few headers I've seen, so that people can see the trends between them. You can't create tables for every header that exists or will possibly exist at all times in the future.

[solidONE]

Originally Posted by Wayno

I posted examples only, for the very few headers I've seen, so that people can see the trends between them. You can't create tables for every header that exists or will possibly exist at all times in the future.

Of course. Although I think its good to error on the rich side just to be safe. It's worthwhile to sacrifice some economy and even a little bit of power for a saftey cushion, I think.