Data Logs! Post them here.

[Silver86K]

Here are some of my latest datalogs after pulling 0.7 timing in most cells, not more FLKC between 6000rpm and 6800 rpm, some spikes down lower now but it all looks good. anything else look out of place?

http://www.datazap.me/u/86driver/95-...g=0&data=20-28

[steve99]

Originally Posted by Silver86K

Here are some of my latest datalogs after pulling 0.7 timing in most cells, not more FLKC between 6000rpm and 6800 rpm, some spikes down lower now but it all looks good. anything else look out of place?

http://www.datazap.me/u/86driver/95-...g=0&data=20-28

You should probably get thge fueling sorted before knock.

If you have a look at your ltft its pretty high in places , best if its below 5% everywhere, at idle it may vary a bit more with large temp changes. Then look at your commanded AFR vsAFR its out about 10% in places above 3v maf, ie your running leaner than what the ecu is asking for. You would probably benifit from some maf scaling both open and closed loop. See the links below ,also you may be better stating off with one of @Wayno s example maps for A01G and try his maf scales it might save you a bit of time links are in his signiture

[Wayno]

Originally Posted by Silver86K

Here are some of my latest datalogs after pulling 0.7 timing in most cells, not more FLKC between 6000rpm and 6800 rpm, some spikes down lower now but it all looks good. anything else look out of place?

http://www.datazap.me/u/86driver/95-...g=0&data=20-28

Of course going to knock when it's running that lean. You're just wasting time detuning your car until you fix the fuel. Running DI until 7k didn't help imo.

http://www.datazap.me/u/86driver/95-...om=12588-12808

[BurnetRhoades]

So for about two weeks after getting my OFT I was enjoying a solid .9 - 1 IAM and the car felt great. I started with a Stage 1 91 Octane tune because I'd recently been out of town and there's garbage for gas in NW Texas and SE New Mexico.

I then got my JDL UEL catless header, OP and catted + resonated FP and switched to the Stage 2 UEL 93 Octane tune and enjoyed a solid 1 IAM until re-fueling one night and first thing the next morning I'm at .7 IAM and for the past week or so it's been anywhere between .7 and .9 with, today, it dipping as low as .67 IAM and I watched it do that in one solid drop from .88-.9 with a single blip of the throttle in 6th at ~2800-3000 RPM. With the realtime graphing of OFT I can pretty much create all the inverted peaks I want in 6th gear by modulating the throttle at certain RPM.

I just got back from doing some datalogging and the results are kinda interesting. The air was a little cooler than earlier today but I was at around .86 IAM and got a log of three runs in 3rd gear up to redline, with under 20% throttle input.

http://datazap.me/u/burnetrhoades/04...s?log=0&data=1

...I then did a WOT pull...

http://datazap.me/u/burnetrhoades/04...s?log=1&data=1

...and then another...

http://datazap.me/u/burnetrhoades/04...s?log=2&data=1

...and when I got back to the freeway on-ramp my IAM popped back up to 1 and it stayed there the rest of the way home. So, timing wise it seemed like the gas plus warm weather conspired to kill my performance, because I could really feel the difference. I also noticed that most of the knock in normal driving seemed to occur when I'd go off throttle during a gear change or sometimes going off throttle but staying in gear at midrange revs. And then the knock from throttle in high gear at low RPM that seems common.

Though I was surprised I ended up back at 1 IAM after doing these logs, I'll take it. I'm still curious if anything seems suspiciously out of whack or like I need to get into MAF scaling.

[Silver86K]

Originally Posted by steve99

You should probably get thge fueling sorted before knock.

If you have a look at your ltft its pretty high in places , best if its below 5% everywhere, at idle it may vary a bit more with large temp changes. Then look at your commanded AFR vsAFR its out about 10% in places above 3v maf, ie your running leaner than what the ecu is asking for. You would probably benifit from some maf scaling both open and closed loop. See the links below ,also you may be better stating off with one of @Wayno s example maps for A01G and try his maf scales it might save you a bit of time links are in his signiture

Thanks Steve, guess its back to the drawing board...

[BurnetRhoades]

Originally Posted by steve99

Then look at your commanded AFR vsAFR its out about 10% in places above 3v maf, ie your running leaner than what the ecu is asking for...

I looked at this for the logs I posted above and I think I spotted some deviation by just under 10%, but being slightly richer, but moments before hitting 3v where it'll be sometimes almost 20-30% off where commanded is asking for somewhere on the order of 15:1 and it's doing 18-20

Is that something to be concerned about? Otherwise I seem to be maybe a touch richer at higher RPM/throttle. I wonder if that accounts for the residue on my tailpipes, just a small black patch that runs down the center bottom of both.

I'm thinking maybe because my numbers look pretty close to being where they should I should set the alarms you outlined in your link and not obsess over watching the graphs. I see knock correction pull down and I get this feeling like something is wrong but it seems like it's all -.69 or smaller, except for what pulled my timing earlier that now seems corrected. I drove to Houston yesterday and it's stuck at IAM of 1 but I noticed small pulls on the correction graph from cruise control throttle inputs to maintain speed in 6th that didn't result in a change in IAM but I see those dips at all and I feel a little sick.

[steve99]

Originally Posted by BurnetRhoades

I looked at this for the logs I posted above and I think I spotted some deviation by just under 10%, but being slightly richer, but moments before hitting 3v where it'll be sometimes almost 20-30% off where commanded is asking for somewhere on the order of 15:1 and it's doing 18-20

Is that something to be concerned about? Otherwise I seem to be maybe a touch richer at higher RPM/throttle. I wonder if that accounts for the residue on my tailpipes, just a small black patch that runs down the center bottom of both.

I'm thinking maybe because my numbers look pretty close to being where they should I should set the alarms you outlined in your link and not obsess over watching the graphs. I see knock correction pull down and I get this feeling like something is wrong but it seems like it's all -.69 or smaller, except for what pulled my timing earlier that now seems corrected. I drove to Houston yesterday and it's stuck at IAM of 1 but I noticed small pulls on the correction graph from cruise control throttle inputs to maintain speed in 6th that didn't result in a change in IAM but I see those dips at all and I feel a little sick.

On petrol you will see the odd bit of minor knock occasionally if its less than -1 just ignore it.


Log a stock tune then you wont worry any more :-)


you will usually get some afr variance between commanded and actual especially around 3V where the changeover between cloed loop and open loop occurs


see wayno's guide
http://www.ft86club.com/forums/showthread.php?t=94822


here is one of his logs


single pull
http://datazap.me/u/wayne/98-v844-3-...&zoom=852-1072


and a longer one
http://datazap.me/u/wayne/98-v844-3-...0-11-13&solo=6


note the variance in afr around 3v and the odd bits of knock hear and their

[ST-A]

the ones with experience in boosted aplications, should i lean it out a little more or keep it like it is now? (see logs)
0 knock whatsoever, nowhere! want to finalize fueling before upping the ignition.

kraftwerks C30 sc 11.32psi/0.77bar
sard EL catless header
sard catted frontpipe
milltek catback
asnu 650cc
DW65c
4bar map
OFT






http://datazap.me/u/st-autosport/fin...zoom=1182-1705

[DocWalt]

In my experience, changing the ignition timing will change the measured AFR a bit because it will change how much fuel is burnt successfully (the reading should go a bit leaner), just an FYI.

[BurnetRhoades]

Originally Posted by steve99

On petrol you will see the odd bit of minor knock occasionally if its less than -1 just ignore it.
...

Ah, good to know, thanks, that puts my mind at ease a bit. And I'll be checking out Wayno's stuff, as well as the JDL tweaks he and Shiv have.

[tha_alkaholiks]

Hey guys,

Just got my UEL installed the other day and flashed wayno's 98UEL tune vita OFT. Just wondering if someone could have a look at my log to see if there's anything unusual? Hints of an exhaust leak? Or weird numbers?

Cheers!

http://datazap.me/u/thaalkaholiks/ue...data=6-8-10-14

[Wayno]

Originally Posted by tha_alkaholiks

Hey guys,

Just got my UEL installed the other day and flashed wayno's 98UEL tune vita OFT. Just wondering if someone could have a look at my log to see if there's anything unusual? Hints of an exhaust leak? Or weird numbers?

Cheers!

http://datazap.me/u/thaalkaholiks/ue...data=6-8-10-14

Only care about WOT logs. Closed loop will take care of itself and timing doesn't need adjusting in those maps.

[tha_alkaholiks]

Originally Posted by Wayno

Only care about WOT logs. Closed loop will take care of itself and timing doesn't need adjusting in those maps.

No worries, did a WOT pull during the log, here: http://datazap.me/u/thaalkaholiks/ue...zoom=2631-2748

[steve99]

Originally Posted by tha_alkaholiks

No worries, did a WOT pull during the log, here: http://datazap.me/u/thaalkaholiks/ue...zoom=2631-2748

either something really weird is going on or your backing off the throttle at at 4500 or so