Official OpenFlash Tablet FA20 Tuning Tech Discussion Thread

[OmarYasin]

Originally Posted by steve99

yes that one is fuel level sensor problem may cause fuel gauge to be inaccurate, probably a trip to dealer if that returns,

I give it 200miles if nothing then I should be good, if I get it again im pulling all the mods, the day that happened I had to leave in a hurry, on my way back no more that 5min later I pulled 5k in first to second and got the light, didnt let the car warm up properly, this was at 5pm after it had sat at work for a couple hours so idk

[lucid215]

Originally Posted by steve99

you have aftermarket intake from memory ?

These can upset MAF scaling and cause high fuel trims.

If you fuel trims were low their is little to learn

Log

STFT
LTFT
FBKC (Knock correction)
IAM
FLKC
RPM
MAF V
Engine load
throttle position
IAT
AFR
Commanded AFR

thanks @steve99 i will try to get some logs today since i put a few miles on the car with the new tune. ill make sure these parameters are selected.

[brzaapi]

So are the OFTs ready for 2015 USDM cars yet. I assume the ECU versions or something will be different.

[Chimera]

Ok, I have a question:
Why doesn't it come from the factory this way?
Mostly looking for commentary on why the stock tune is like it is vs the stg1 OFT tune. I understand the differences are in things like timing fueling etc. I'm looking for a less specific and more executive level rational ups and downs comment between the two.

[qoncept]

Originally Posted by Chimera

Ok, I have a question:
Why doesn't it come from the factory this way?
Mostly looking for commentary on why the stock tune is like it is vs the stg1 OFT tune. I understand the differences are in things like timing fueling etc. I'm looking for a less specific and more executive level rational ups and downs comment between the two.

Extra conservative to be more certain it's safe, positioning so it doesn't compete with other cars they sell, better fuel economy and/or emissions.. take your pick. I've believed all along that the WRX has a cat in the up pipe (whereas the STi doesn't) for the sole purpose of handicapping it vs the STi.

[nelsmar]

Originally Posted by steve99

Yes loose fuel cap can cause that code

Yes Shiv said E85 and BPB were not a good mix, BPB shifted peak power lower in rpm range but E85 did its best work at a higher RPM than where BPB were efficient so it was counter-productive.

Wait wait wait... What? E85 tends to make power gains at every RPM. They just might not be as big of a difference @ peak with the BPB so when desk top racing by WHP numbers and ignoring the chart it may seem not as beneficial but I fail to see how this makes sense, do you have a link to the actual post?

[lucid215]

http://www.ft86club.com/forums/showthread.php?t=62471

http://www.ft86club.com/forums/showp...1&postcount=74


also someone did a dyno test between two cars. one with bpb and one without. heres the link

http://www.ft86club.com/forums/showthread.php?p=1784979

[steve99]

Originally Posted by nelsmar

Wait wait wait... What? E85 tends to make power gains at every RPM. They just might not be as big of a difference @ peak with the BPB so when desk top racing by WHP numbers and ignoring the chart it may seem not as beneficial but I fail to see how this makes sense, do you have a link to the actual post?

Agree with what you saying, see send link in lucid215 post above, maybe it just needs more work and you would still get benifit up to about 6500, just looses out after that.

[nelsmar]

Originally Posted by steve99

Agree with what you saying, see send link in lucid215 post above, maybe it just needs more work and you would still get benifit up to about 6500, just looses out after that.

you'll still get a benefit, its just you don't even out the top end and get the power the BPB loses up top. I think people are misunderstanding the post a bit... You will still get a gain at basically every RPM on E85. It might just not need its own custom map for it.

[jester04]

Wow have been looking for this thread since i joined lol. Glad i found it.

[Gords_zenith]

Im a too lazy to re-read the whole thread, so I'm not sure if this has been answered yet, but let's say if I wanted to run the 93 but get caught somewhere where I have to use 91, will tune compensate to protect the engine?

[aristo]

^^^

Good question wondering the same thing - but my guess would be that - I think the flasher holds up to 5 flash files so if you were planning to go on an extended trip and want to prevent this, you can load up the files for 91 and 93 for your setup so that you can just reflash to the appropriate fuel if worse comes to worse.

Would still like a quick and short answer about the effects of running 91 oct on a 93 tune with OFT though. For science.

[Carlitoz3]

Originally Posted by nelsmar

you'll still get a benefit, its just you don't even out the top end and get the power the BPB loses up top. I think people are misunderstanding the post a bit... You will still get a gain at basically every RPM on E85. It might just not need its own custom map for it.

Thanks for the clarification, was wondering about having my BPB on e85.

[lucid215]

Originally Posted by Gords_zenith

Im a too lazy to re-read the whole thread, so I'm not sure if this has been answered yet, but let's say if I wanted to run the 93 but get caught somewhere where I have to use 91, will tune compensate to protect the engine?

i dont believe the tune will compensate for it. you will most likely start knocking a bit due to the lack of octan rating. i believe the timing tables are a bit different between the two roms. maybe @steve999 or @shiv can give a better answer