Official OpenFlash Tablet FA20 Tuning Tech Discussion Thread

[steve99]

Originally Posted by mightyt73

I use 93 from Exxon. Maybe I will try a different station. I'm guessing as long as it doesn't happen a lot I will be fine?

personally I don't like to see iam drop on good 93+ fuel, but stock tune will do it occasionally and some aftermarket tunes as well.

I doubt it will do damage, but I have fixed it in my car by pulling a small amount of ignition timing.

[Grip Ronin]

so ive rescaled this maf so that its dam near the command af the whole power band but soon as ltfr gets going it pulls -2 in injection mode 2 and in direct only it adds .78% ive limited learning to 2% both ways but its swinging my af to 13.4 way past the set number. im bout to jus disable all ltft learning .

[steve99]

Originally Posted by Grip Ronin

so ive rescaled this maf so that its dam near the command af the whole power band but soon as ltfr gets going it pulls -2 in injection mode 2 and in direct only it adds .78% ive limited learning to 2% both ways but its swinging my af to 13.4 way past the set number. im bout to jus disable all ltft learning .

Sounds like you got the CL scaling done ok but the OL scaling at the higher end of maf flow rates is out ??

did you use the vgi utility ?

[Kodename47]

Originally Posted by Grip Ronin

so ive rescaled this maf so that its dam near the command af the whole power band but soon as ltfr gets going it pulls -2 in injection mode 2 and in direct only it adds .78% ive limited learning to 2% both ways but its swinging my af to 13.4 way past the set number. im bout to jus disable all ltft learning .

Any idea how close your PI/DI errors are?

Any idea how good the CL scaling is? Is it temperature related?

LTFT can't be generated when the car is in OL, only CL.

[Grip Ronin]

Originally Posted by steve99

Sounds like you got the CL scaling done ok but the OL scaling at the higher end of maf flow rates is out ??

did you use the vgi utility ?

i only adjusted higher rates. i dont know what vgi utility is but yikes wouldnt import my logs so i just free handed it till they were near commanded af with no trims

[Grip Ronin]

Originally Posted by Kodename47

Any idea how close your PI/DI errors are?

Any idea how good the CL scaling is? Is it temperature related?

LTFT can't be generated when the car is in OL, only CL.

i dont know how to check injection errors. and its not temp related. ive only scaled open loop

[steve99]

Originally Posted by Grip Ronin

i only adjusted higher rates. i dont know what vgi utility is but yikes wouldnt import my logs so i just free handed it till they were near commanded af with no trims

Might be worth have a look here

http://www.ft86club.com/forums/showthread.php?t=64790


Vgi's utility will directly import your logs from oft or tactrix and produce maf scaling saves heaps of time

[Kodename47]

Originally Posted by Grip Ronin

i dont know how to check injection errors. and its not temp related. ive only scaled open loop

If you've only done OL then that's likely why. It's the error in CL that's creating the LTFT.


How I do the PI/DI is to run 100% of either and then do logging as if I were doing CL and then plot both sets of errors on a graph. When I get a chance I'll link on that thread to a spreadsheet to import and compare.

[Grip Ronin]

Originally Posted by Kodename47

If you've only done OL then that's likely why. It's the error in CL that's creating the LTFT.


How I do the PI/DI is to run 100% of either and then do logging as if I were doing CL and then plot both sets of errors on a graph. When I get a chance I'll link on that thread to a spreadsheet to import and compare.

ok cool . idk if changing the di pump had anythjng to do with it. i wasnt doin much logging before that

[germgerm]

http://datazap.me/u/germgerm/oft300?...ta=1-7-8-10-12

Here's my data log running oft300 would appreciate your guys input.

[celica73]

Installed my OFH last night, here's the first data log with about 35 miles on the current flash (OFT Stage 2 UEL, version 1.59)

http://datazap.me/u/celica73/oft-stg...log=0&data=1-9

It starts with 1-3 redline shifts each time. A little cruising then a 3rd gear pull to redline from about 2000 rpm.

[steve99]

Originally Posted by celica73

Installed my OFH last night, here's the first data log with about 35 miles on the current flash (OFT Stage 2 UEL, version 1.59)

http://datazap.me/u/celica73/oft-stg...log=0&data=1-9

It starts with 1-3 redline shifts each time. A little cruising then a 3rd gear pull to redline from about 2000 rpm.

Looks pretty good.

LTFT good
AFR bit rich (WOT) but that's pretty standard with OFT tune (on the safe side)

Bit of knock above 6400 rpm judging by sharp drop in kc learned values, if you log "Knock Correction" (FBCK) and FLCK (fine learning knock control) you will see it easier . Drop off the VVT intake and exhaust parameters.

[Walla Walla]

here is my datalog

http://datazap.me/u/walla-walla/stag...log=0&data=1-9

Stage 2, with Crawford BPB, 91 octane, and mod on the tune for some Pops (see http://www.ft86club.com/forums/showthread.php?t=61069 )

so, how is it looking?

[Sniper2606]

I think its time for OFT along with a nice turbo kit.

Ill even drive from OKC to CALI to lend you my turbo brz for testing

@ shiv@vishnu