RomRaider

He has a GT3076R.

That's just crazy.

He still needs to start his own thread with everything in it. His data is too scattered over here and over at nasioc. He can post his stock rom plus your description. Then we can look at his logs and determine what he needs to do. With a GT3076R, he's going to need to start from scratch. If he doesn't have a built block, we can estimate his injector scalar. Or better yet, hopefully, he has flow tables from DW.

Tell him not to touch his rom and not to do any WOT logs. Just post the logs that he already has. Hopefully, he has some good logs to start from.

Hi mickeyd2005,

I have a thread HERE on RomRaider which details most things I can think to post.

I'll add some more info to it now and hopefully someone can assist.

Regards
Leslie

Hi there

Not sure if this is the right place for this post, but was wondering if anyone can share more info on the use of the MAF scalar tab on romraider logger to scale CL MAF.

Have read a few posts and did some searches but nothing specific came up.

Some background.... I have managed to get my OL MAF scaling pretty close (~0.2 AFR difference between target vs actual WB AFRs up to redline on WOT). Also noticed that i'm within +/-5% AF Learnings A-D. So based on what i've read, things seems pretty on check.

Question - does this mean that i still need to tune my CL MAF?

I basically tried and managed to get some data recorded on the MAF tab from half hour of CL driving but was wondering how do i make sense of the graph/info? Like how do you interpret the graph and from there adjust/compensate specific map values to correct? Is there a user guide or tutorial for the MAF scalar tab somewhere?

Is there a way to capture/save the graph for later analysis or to post here?

Also, is this tool good enough for CL MAF tuning or do i still need to use mickeyd2005's spreadsheet?

Sorry if this is the wrong thread to post this.

Thanks.

I am just wondering.After scalling my entire closed loop range within +-2 my latency needs to be lowered .10(this tool calculated -0.10)
I am assuming that after the closed loop maf is scaled i should go out and log the entire 0-60 closed loop range with this tool and then calculate what the latency is with this data.
Would this not throw my closed loop maf scaling out?

Yes, it will throw it off. This spreadsheet will only allow you to scale one or the other. Not both.

If you have stock injectors, leave it as is and make all your adjustments with your MAF.

Using the line of best fit, make the corrections to your MAF scaling table according to total AF error at a certain MAF V. Say at 2.2V you are +10%, then you would find the matching cell in your MAF scaling table and multiply its value by 1.1 for a 10% addition in airflow.

The tab in the RomRaider logger does this step for you, according to the line of best fit that you have applied. Much faster than the old days, but this spreadsheet was the O.G. time saver!

With openloop scale must i also have my WGDC to zero?

no, you can scale open loop at any kind of boost profile.

It's easier to scale the mid-range with WGDC = 0 because you want to have near steady state MAF conditions.

I have a question about my cl maf scale.
If i use the romraider Tab i don´t get mij maf scale right at 1.2 to 1.4 V

What you can see on my tab it´s that romraider tells me the correction at 1.2 to 1.4V 5% are.
But if i drive at the low maf voltage i see on my lc-1 14.6-14.7 AFR

The deviation it's only at 1.2 to 1.4v can somone tell my why?

STFT and LTFT is correcting your AFR. That's why your AFR is correct even though your MAF is not correctly scaled. Frankly, it's close enough. The 1.2 to 1.4V range is difficult to dial in.

Personally, I would fix it because you can. Also, if you plan to use the injector tab in the future, you should make sure this range is properly scaled FIRST before installing injectors.

Could you please tell me how to log STFT and LTFT (low, mid and high) with romraider. I ask because I cannot get a solid answer in the thread that I posted the question in.

TIA

I'm really not sure what your question is: low, mid, high?

Use learning viewer to view your AFR Learning A, B, C, and D. AFR Learning #1 is what we call long term fuel trim (LTFT). AFR correction #1 is what we call short term fuel trim (STFT).

Is the AF Learning #1 for the idle fuel trims or the cruise fuel trims or both? Basically, does it adjust during cruise at steady speed or only during idle?

What is the range that AF learning #1 should fluctuate between? +/-5% or +/-10% on a stock car? I logged a stock 06 STI and the AF learning #1 was between -6.25% and -9.35%. Is that normal?

AFR #1 is the current long term fuel trims. It is equal to either AFR Learning A, B, C, or D depending upon what your MAF value is.

AFR Learning is active during idle and at cruise.

If you are tuning your own car, you should keep AFR Learning D as small as possible. You can usually get it down to +-2% fairly easily. AFR Learning A, B, and C can be +-5%.