MAFT PRO version 5.00 is now available, you will find it downloadable below.
I have also attached Turbo Bob’s current Bin. I am told it drives pretty well, decel is a little rich yet but its getting there. It’s tuned so the trims all settle to 81, and the O2 trim stays around 80 most of the time.
The car has a stock fuel system with the fuel pump resistor bypassed. Turbos are HKS 13G’s, stock intercoolers. IAT is tapped into the stock plastic Y pipe, and his BOV is reversed.(what ever that means…lol)
In his Bin, the user tunes are all set to 0, and he is tuning the VE table. He is also using the user defined axes for the VE table. This is a new feature in version 5. Be sure to update to version 5 before trying this Bin.
Use the “vehicle 2” XDF file.
Specific features changed since 4.80
User modifiable VE table axes
user tuneable analogue MAF table
minor improvement to TPS response functions (was making idle too rich and unstable at times)
“airflow limiter” to assist tuning drop-throttle fuel
enhanced TPS function for analogue output, fixes PTFB
“set point” setting is now a “max” setting and can be used to limit analogue output functions
reversed TPS for Subaru legacy incorporated
aux fuel pump control incorporated
uploaded version 5 as soon as it came out although not tweaked anything and using your bin file dave. Seems to be a lot smoother, less judder on gear changing, accelerating etc. Although have noticed that on idle occasionally runs quite rich then levels out again. Otherwise seems better than before.
I have uploaded 5.0 to four cars today, and it is much better for idle. The only difference I have seen is that the idle is much more stable.
The option in the Part Throttle menu called PT Tracking Delay (I think) is the number of seconds that the MAFTPro will delay applying PT Tracking. This should be set to a value that allows afterstart to do it’s job before the decay starts.
From TurboBob on 3si about the Enhanced TPS settings in the PT Tracking page:
"the idea is this:
you use one of the analog outputs as a TPS input to the ECU, and when the RPM or MAP/Load exceeds the thresholds, this simulated TPS swings to max, putting the ECU into open loop / WOT mode.
The issue with a 3S is that the analog outputs are busy simulating the IAT and Baro. So to use it, you install a resistor in place of the IAT and use analog 1 to feed TPS to the ECU.
I developed it primarily for the Supra guys, but it works on a 3S.
Bob"
So, to use this you would have to change the wiring loom, and I don’t really see much benefit to us, unless you wish to push the ECU into WOT at a certain RPM. For most simple applications, this won’t help anyone, so you can set the values to whatever you like as they are not used.
Just though i would let you know running rich was due to a vacum leak, so no problem at all really.
Dave
yes still using your bin file just inreased the mainscale till it felt about right and idled around 14.7. Okay so the tune isn’t perfect and fluctates every now and then but always settles down. Anyway us beggars can’t be choosers. (thanks again Dave) FPR is set to 43 or 45 can’t remeber exactly. If this is wrong someone let me know.
Arrrgh HA!
So all of us who were having idle problems, it was because we were unlucky enough to have a TPS wobble at idle. Speaking as a software engineer, this smells like a software bug to me. It would also make the car pretty difficult, ney impossible, to tune properly. I’m running 5.0 now, and idle has improved. We shall see. :shock:
Yeah, things are much better. Also, please remember, that when you use someone else’s bin file, you MUST re-tune for your own cars values. I retuned 3 at the weekend that had used a standard bin, and it was just a matter of adjusting the PT Tracking values to match your own idle and TPS values.
Marc,
Is there any chance you could post the PT Tracking and other articles that you posted on the Evil Empire forums on here as I haven’t been able to access the EE forums for a while and I know Rob is run off his feet at the moment.
