RomRaider

Ok here is the rom. It was being ran when the above logs where done. The bottom end of the maf has been somewhat scaled.

Alright maybe someone has this answer. I was thinking, we only have 93 octane with 10% ethanol around here. So technically this could throw my afr off if the wb02 was scaled for straight gasoline correct?! I found some information on it on innovates website VIA google, but apparently that portion of their site is down...

So if I make my AFR read 13.8 for e-10 *which innovate says is stoich for e-10 fuel* then my fueling is REAL close, needing some minor scaling like closed loop... does this sound right?!?!

You can do this.

However, your AFR Learning D is close to zero.

I tune the closed end portion of the MAF scale and the open loop portion of the MAF scale with the same gas. That way, they are a matched set.

So, let's say, later on, the gas is changed to 0% ethanol. Your AFR Learning D would adjust itself and it would affect your OL scale in the same percentage.

Use Airboy's interpolation spreadsheet to determine how far off you are and then adjust the MAF scale accordingly. If you don't get an answer by later tonight, I'll post what I think your MAF scale should be assuming your AFR Learning D is zero.

Here is what I have, have not flashed it but I have a rom with this in it, with your approval....

Thanks

Jerod

Rescaled the maf, now I'm seeing loads at almost 2.50.. My IDC's are almost 100%. Since my load was so high, my timing was next to nothing. I raised my timing advance in the higher load ranges to compensate for this. Please advise me if this is a bad thing or not!? I am also attaching the 3rd gear log. This log was prior to any timing changes. Should I adjust my timing advance to take it back to where it was prior to the maf scaling?

Sorry about the log, my brother is not so great with RR (hes a Hondata Nut) so please ignore some of the things logged. And yes he forgot TOA, it WAS 100% the whole log....

I can't read that last hex.

However, it looks like there must have been some temperature dependency because in your last log, you're only 3% off. For everything above 3.4 volts, I would increase MAF by 3%.

It looks like there is also rpm dependency above 6000 rpm. Not a big deal. Just tweak it using the AFR table.

Really, for such a small difference, you can just adjust your AFRs using your OL fuel table.

My only concern would be the difference in AFR when temperature changes.

ok I'm really lost now. Since I've scaled my maf I am seeing G/S in the 225-230 range (prior was 200ish) and now seeing load around 2.4-2.50 with the highest before being 2.25ish. My timing is all off now and I'm really lost on how to bring my timing table to where they where prior to me scaling my maf. I really need some help on this one, fueling is no big deal on getting lined out, but timing is......



Jerod

If your atmospheric pressure is 14.36 psi, then I think that your max MAF for a TD04 should be closer to 210 g/s.

I never did see your proposed MAF scale. How much did you increase it?

Use Airboy's spreadsheet to get your timing back to where you want it.

Here it is.. VS just closed loop scaled. I am still not reaching target afr's with the scaled values and I'm seeing close to 230g/s and 2.50 g/rev....

What about fueling!?

The log is a WOT 3rd gear log from last night..... Sorry my brother was in charge of the laptop. It is ALL WOT with 14.36 Atm.

I can't open romraider here, but your value for 2.77 volts is almost definitely wrong. Your previous AFR Learning D was close to 0 so you should not change the 2.77 or 2.89 volt value.

The MAF scaling spreadsheet falls apart in the high load region unless you have a LOT of data. Usually, the Excel curve fit causes a funky curve at the very end of the data curve.

My D range is still 0. I am using the scaled version of that. I'm just trying to figure out why to get my OL tables so close I have to run such hiigh maf G/s? If I don't touch my ignition tables, I am at 12* timing at peak torque.... where as before I was around 15.5*....

I tried using Airboys spreadsheet but I'm still confused. I just don't want to pop my junk because of timing....

You should really reconsider the 2.77 volt change you made.

I would check learning view every day for the next week or so. The 16 bit WRX has AFR learning D default set up as 50+ g/s which means it only gets evaluated over a very narrow window. Sometimes it doesn't get evaluated for days.

Mickey,

This is 2 days worth of driving around town and a steady drive for about 100 miles. Attached is the learning view and maf scaling that I am using. Basically everything after 3.4v is 3% higher than stock. Therefor in my higher load regions in my base timing, I multiplied the load column by 3% to adjust for the increase in load. For instance, my 2.5 load range is now 2.58. I did this from .86 load on. There is no FLKC and no IAM drop.

Ok, since my maf should be scaled close now (about 215 g/s at 17.5lbs and 14.36 atm.) why am I still running a half point lean?!? Its not so bad now, about 11.5-1 at Peak Torque and richens up to about 11.2 at peak horse. I have stock injectors, with stock injectors and stock latency values. What else could be skewing my fueling?! The only other thing is a slight exhaust leak, but that would show all the time right?!


When my car is NOT running, for instance early in the morning, and I turn it on, RomRaider shows my LC-1 at 20.33-1, this is the same reading I get when I get completely out of the throttle.. I was under the impression it should read up to 24-1 (I'm probably wrong).


I know my 2.77v maf is way off, but I am off to class till late so it will have to wait till tom.


Thanks for your help, and anymore is very much appreciated.


Thanks again,

Jerod

Alright.. I've got my maf scaled real close A. -.86% B. .10% C. 0% D. .10%
I'm still running a bit lean, 11.0-1 at peak torque (3800ish), but I'm also running 98% IDC.

My last question, I finally learned to read compressor maps last night *yay!!* and finally found a comp map for a td04-13t (stock turbo) and noticed that its efficient to around 28lbs in the low/midrange area.

Will this boost target be safe?! Hopefully dipping a bit into the 10's around peak torque on fuel.

Be careful reading compressor maps. It doesn't include the relationship between the hotside and wheel speed. Also, it doesn't include pressure drops in the intake and pressure drops in the intercooler.

In any case, I plotted minerva's logs on the TD04 map (not including pressure drops).

topic3319.html

Mickey,

I left my boost tables how I had them. I have my maf scaled the way you suggested and fixed my 2.77 volt area. I have super good CL fuel corrections. How lean is to lean in OL? I am around 11.5-1 dips down to 11 at peak torque and raises back up to 11.5 by redline. This has no relevance to the mapped OL AF table. IF I scale my maf for this, I have awesome fueling, but see loads as high as 2.6-2.7 and 230 g/s. This is way to high and it screws with my timing and fueling....

Could this be a pump problem, as I am running the OE pump and I am seeing IDC's as high as 96%... I'm thinking I may have my LC-1 To close to the turbo so I am going to swap my stock rear o2 forward and put the LC-1 in the rear o2 location..... maybe this will change my readings a bit in OL...With my IDC's and only 17.5lbs I find it hard to believe that I'm running 11.5-1 and 96% IDC..

Any thoughts?!

That log only shows 210 g/s which seems normal for a TD04 near sealevel.

When do you see 230 g/s?

Why would it screw with your timing and fueling? Do you have your base timing table scaled out to 2.8 g/rev?

I think your AFR looks fine. However, I like to shoot for closer to 11 above 4000 rpm. That way there is extra margin for unforeseen changes. For example, fuel changes but AFR Learning D doesn't have a chance to reset itself.