MalibuJack

iTrader: (5)

Yeah, you have a few options for that.. you can alter the MAF scaling table, which I haven't quite figured out yet so it reads lower at higher RPM, actually, it reads the same high value (due to higher airflow) but if your map is now out of range, you can at least get it back in range.. you might be able to play with the MAF size value also, that might help, since a lower value might make the ECU think the sensor is smaller, and therefore interprets the higher Karmann value as less airflow, therefore putting you back on track in the maps..

CBRD

iTrader: (60)

as im studying the ECUflash software (we tune quite a few UTECs and little use on AEM) like MalibuJack...

looking at your flash to my stock MR map, looks like you havent dont much at all with fuel and timing... just in your scaling and MAX boost level.

curious if im missing something, since im learning the program.

i am going to be flashing our car with this program for injector compensation and mostly using the UTEC for race map etc... or alky...

the tip-in response on the UTEC can be buggy when using scaling for larger injectors... so im hoping the ecuflash will help.

cheers

cb

taenaive

iTrader: (20)

I am still working on that map. it will be very different from the original post. I found that for my 680cc (AMS type injectors), Injector battery latency compensation shoud be raised by 1.8 times from the stock value and 625 for the injector scale value. that is where I am at currently.

MalibuJack

iTrader: (5)

I found a majority of the "work" can be done by playing with the injector scaling and batt voltage compensation..

In my case, I have control over my MAF signal and scaling, and can position it wherever I need to in the ECU's map, with a bigger than stock turbo, you'll see the timing (17 degrees or so to 23 degrees or so.. at higher RPM is usable) so scaling is half the battle.. this is what Ive done to get my car to idle good..

MAF Freq (30 hz approx is stock, probably different with alarger turbo)

Injector scaling about 10% smaller than the size of your injectors (1000cc injectors would be about 950 or 925cc's)
the latency number is trial and error, since you get your idle trims in check with the scaling and minor adjustments to the latency, then at higher RPM, see how off the trims are, and adjust the latency for the 12.5 and higher voltage cells..

Once you get there, your fuel maps should be "Roughly" where you want them since the injector scaling does most of the work, and if your fuel trims are in check, then the rest of the map is "Close to stock" you can then tune from there..

MalibuJack

iTrader: (5)

To get a good idle, you probably need to add 3-4 degrees of timing at idle levels, that will increase the exhaust gas output, what that does is spin the turbo a little easier at idle and causes less restriction (especially for a aftermarket turbo) that should reduce the engines propensity to surge up and down (with the stock MAF)

honki24

iTrader: (23)

Hey, I've decided to start over and remove my tuner's tune so that I can do my injector scaling correctly. I have precision 680s. I've set my injector scaling between 622 and 650 (now at 636) From what I can tell, you want injector scaling to be about 93% of your injector rating. (634 in my case). I was watching STFT and it seemed good (I've never really watched this parameter before, but am starting to as per malibu's advice) It bounced to a max of +/- 12% only momentarilly (seemed to be quite jumpy during driving) and at idle stayed at 0 or +/-1%. I've done as has been suggested and set the battery voltage latency to 1.8 times the stock values. I've also turned down the accel enrichment from this tuner's consistant "1.98" all the way down the chart to mimic stock but a bit higher:

Latency
4.69 5.952
7.03 3.024
9.38 1.848
11.72 1.200
14.06 .768
16.41 .480
18.68 .264

accel enrichment
500 1.85
1000 1.73
1500 1.36
2000 1.23
2500 1.23
3000 1.44
3500 1.56
4000 1.66
4500 1.66
down to-
7500 1.66

I'm still getting the cel: system too rich. This means I need to either increase scaling, decrease enrichment, or decrease my latency compensation?

From the logs the only thing I remember in the CEL info was that it was at approx. 29% throttle. And from the wideband, everything seemed okay. It actually appeared that if I were to turn my boost back up to normal levels (I'm only at 15 now on a bad clutch) it would go lean.

Thoughts? Ideas? anyone successfully scale 680s?

taenaive

iTrader: (20)

My recent stable tune was using scale value 585.
injector battery voltage latencies are:
11.72 = .984
14.06 = .796
16.06 = .432

And, I made the significant changes on fuel maps to compensate the rich and lean condition. I am pretty satisfied with my current setting.


Here is the file of my current map. I made a good power with this map also. The power level is about the same as my first post but this runs with more rich fuel and higher timing.

http://www.savefile.com/files/4761750

honki24

iTrader: (23)

'preciate it, I'll check into it. did you leave your lower latency values stock?