MAFT-Pro Tuning Thread Unofficial and Uncensored

[turbobob]

looked at your log.

Vf is changing, which tells me that you have your stock O2 connected.

But Correction factor % is changing, which means that your PT tracking is turned on.

These 2 can't work together. The ECU will fight to keep the AFR at 14.7, the PT tracking will try to achieve your target AFR.

Turn off the tracking, and tune the system for Vf.

Or

you can turn off the tracking, and unplug your stock O2 and tune the unit for something like 14:1 at part throttle.

either way, pt tracking is for after you have the unit 90% tuned.

Do one of these, and do some more logging. Its hard to get a picture of the tune with the Pro and the ECU both chasing each other.

 

[chriso]

looked at your log.

Vf is changing, which tells me that you have your stock O2 connected.

But Correction factor % is changing, which means that your PT tracking is turned on.

These 2 can't work together. The ECU will fight to keep the AFR at 14.7, the PT tracking will try to achieve your target AFR.

Turn off the tracking, and tune the system for Vf.

Or

you can turn off the tracking, and unplug your stock O2 and tune the unit for something like 14:1 at part throttle.

either way, pt tracking is for after you have the unit 90% tuned.

Do one of these, and do some more logging. Its hard to get a picture of the tune with the Pro and the ECU both chasing each other.

How do I turn PT Tracking "OFF" (I didn't even know it was on)??? and, yes, my stock O2 sensor is still plugged in. Should I unplug it?

What should FE Smoothing be at "00" or "30", I was wondering since mine is at 30 if this is causing the oscillations of my AFR or is it the PT/O2 struggle you are talking about?

 

[chriso]

Turn off the tracking, and tune the system for Vf.

I don't really understand what you mean by this...

 

[turbobob]

How do I turn PT Tracking "OFF" (I didn't even know it was on)??? and, yes, my stock O2 sensor is still plugged in. Should I unplug it?

What should FE Smoothing be at "00" or "30", I was wondering since mine is at 30 if this is causing the oscillations of my AFR or is it the PT/O2 struggle you are talking about?

turn PT tracking off by setting both of the TPS thresholds to 4.9

FE smoothing has no effect on the tune, it controls the 'smoothing' of some data that is in the logging stuff. If you have your AFM/MAF installed, the pro can compare its signal and the Speed-Density calculated airflow to generate "Flow Error" (FE) data. This can be seen in the logs, on the LCD, etc. for part throttle tuning, FE smoothing set to 30 works well.

The oscillations are most likely the PT tracking and the ECU working against each other.

Bob

 

[turbobob]

I don't really understand what you mean by this...

Generally, Vf = 2.5 volts means the tune is correct (at that RPM/Throttle). This is how to tune the part throttle on a Supra (apparently).

Dr Jones has some tuning info for this stuff.

Bob

 

[CRE]

Anyone here have a MAFT Pro running on an N/A yet?

 

[chriso]

turn PT tracking off by setting both of the TPS thresholds to 4.9

FE smoothing has no effect on the tune, it controls the 'smoothing' of some data that is in the logging stuff. If you have your AFM/MAF installed, the pro can compare its signal and the Speed-Density calculated airflow to generate "Flow Error" (FE) data. This can be seen in the logs, on the LCD, etc. for part throttle tuning, FE smoothing set to 30 works well.

The oscillations are most likely the PT tracking and the ECU working against each other.

Bob

Alrighty then....Idle TPS should be at 4.90 and Cruise TPS at 4.90 under the PT Tracking page, will do.
I'll go change FE Smoothing to "00"
Does drjonez have the Vf info posted on his site (MKiiitech.com)? Is it just a matter of adjusting the AFR Tracking info under Hi/Med/Lo tuning so that it keeps the Vf as close to 2.500 as possible?

 

[chriso]

Alrighty now....I made the PT Tracking setting changes and the car idled pretty darn smooth. There were a couple of very small hiccups once she got up to temperature but nothing I am worried about right now. I will take it out for a short test drive and see where I'm at.

Thanks a lot Bob for the advice.

There may be a light at the end of the tunnel (let's just hope it's not a train !)

 

[turbobob]

Anyone here have a MAFT Pro running on an N/A yet?

There's one guy with a Lexus V8 powered supra, running N/A with Nitrous......

Bob

 

[drjonez]

Alrighty then....Idle TPS should be at 4.90 and Cruise TPS at 4.90 under the PT Tracking page, will do.
I'll go change FE Smoothing to "00"
Does drjonez have the Vf info posted on his site (MKiiitech.com)? Is it just a matter of adjusting the AFR Tracking info under Hi/Med/Lo tuning so that it keeps the Vf as close to 2.500 as possible?

of course there's info on MKIIItech:

http://www.mkiiitech.com/forums/viewtopic.php?t=593

you want to shut AFR tracking off unit you have your tune pretty close.

 

[drjonez]

Anyone here have a MAFT Pro running on an N/A yet?

not on the 7M-GE. shouldn't be an issue- the factors are already in the SW, the only catch is the fuel pump switch. see mkiiitech for a work around...

 

[CRE]

not on the 7M-GE. shouldn't be an issue- the factors are already in the SW, the only catch is the fuel pump switch. see mkiiitech for a work around...

Hey, thanks for the reply. I saw the work around earlier. I was hoping for someone who could give me some pointers and let me know what other differences I need to look for when wiring it in. Also some base setting to get it up and running close to stock for the time being would be nice... until I learn how to tune and tweak the various settings.

My car's not running worth a damn at the moment and the AFM is one of the things I suspect.... so I figured if it does turn out to be the AFM I might as well dump it now and go MAP.... I think I've got everything needed but the actual MAP sensor.

Oh, and Dr. Jonez, I PM'd you on Full Throttle's board with my specific questions.

Thanks!

 

[drjonez]

i'm not sure where people are getting confused- the MAFT pro is a piggyback, just like the SAFC, SAFR or eman. there are no base settings! leave all tuning parameters at zero and it IS the same as stock!

that said, the only difference from the GTE setup would be the F-out mode, i'm not sure what number the GE is.

 

[elhsupra]

There's one guy with a Lexus V8 powered supra, running N/A with Nitrous......
Bob

Yup, that me. But since my AFM is pretty much the same as the 7MGTE's I use their settings for the F-out and change my low/mid/high to about 30/60/95.

The current Beta (4.78) has some features in it to help do this. Its not posted, but I can make it available if you guys want.
Bob

Bob, you know I'm willing to test anything

 

[CRE]

i'm not sure where people are getting confused- the MAFT pro is a piggyback, just like the SAFC, SAFR or eman. there are no base settings! leave all tuning parameters at zero and it IS the same as stock!

that said, the only difference from the GTE setup would be the F-out mode, i'm not sure what number the GE is.

Confusion and paranoia in my case, I don't wanna fry something.

So aside from the one wire which goes to the stock AFM which needs to be rerouted and the F-out I can just use all the other settings in the quick start guide for the MKIII? and I'll be running like stock but with MAP?

 

[CPT Furious]

I'm sorry about not posting my settings yet. I'm going TDY for 2 months so the car is on the back burner. I set up everything according to the quick start guide, the boost control to 17 psi according to someone else's post either here or on Mkiiitech, and the only other change I made was using VE table 2.

With just these settings, it is working well for me. When I get back, I'll start making some high speed runs and datalogging to mess with the mainscale and such, but right now as a DD it's working awesome.

 

[tookwik4u89]

Bob, I snipped the afm connector and cleaned up the harness when I did my engine bay so I dont wanna go there right now.

I started having the problem after I changed my TMcorrect to 0, Mike Malloy and I were comparing notes, and he was seeing 20 deg advance at high boost while I had 13, he thought that was low, and his TM correct was 0, mine was 1.29 I believe, maybe I should set it back?? I know it affects the reading at higher rpm, but no good way to set with timing light as marks on cover dont go very high. TM base =1.9

 

[supralover2000]

Bob , any idea why my timing monitor reads like this on tuner pro?

Any chance that you forgot to upload the current bin in the maftpro to the tunerpro? from looking at the screen shot above, it looks like the bin file is for maftpro version 4.60 and I believe that you said you were using 4.65 now..

 

[tookwik4u89]

Ya, those 4600 files came with the 4.65. I set the tm correct back to 1.27, but havent been able to try it, due to slick roads. Hopefully this afternoon.

 

[drjonez]

Confusion and paranoia in my case, I don't wanna fry something.

eh, knowledge is the best cure for those.

So aside from the one wire which goes to the stock AFM which needs to be rerouted and the F-out I can just use all the other settings in the quick start guide for the MKIII? and I'll be running like stock but with MAP?

yes.