OpenFlash Tablet

[R2]

Originally Posted by Kodename47

Then you need to do the accelerator pedal calibration:
- Car on, but not started
- Fully depress and release the pedal 10 times
- Start car


You can do that at any time, not just after a flash. So if you feel like you're still experiencing "lag" then just give that a go. There is, however, always a small area of the pedal that doesn't register and that is normal. It is also true that trims can have a decent impact on feel too.

I certainly have tried that exact procedure, many times in fact, even at different pumping speeds, different intervals, etc.. The 10 times pedal pump does make sense it should work - it's no different than auto scaling any other transducer. Unfortunately, this process produces no noticeable change. So, I'm at a loss for ideas, the software should lock in to the 0% position and scale almost immediately. If it takes so long to do, what else can I do?

It is odd, though, that I seem to have more issues with this than most. The only other idea I have is that my throttle pedal sensor is out of tolerance more so than the average which the auto scaling algorithms need more time to converge upon. Not sure if I can tweak this or not. Thanks for your help and suggestions though, I'll keep digging into the issue and see if anything else helps me out.

[R2]

I should add, this is not a problem with the OFT, obviously, but an issue with either my vehicle or my expectations.

[Andrew025]

Originally Posted by R2

I certainly have tried that exact procedure, many times in fact, even at different pumping speeds, different intervals, etc.. The 10 times pedal pump does make sense it should work - it's no different than auto scaling any other transducer. Unfortunately, this process produces no noticeable change. So, I'm at a loss for ideas, the software should lock in to the 0% position and scale almost immediately. If it takes so long to do, what else can I do?

It is odd, though, that I seem to have more issues with this than most. The only other idea I have is that my throttle pedal sensor is out of tolerance more so than the average which the auto scaling algorithms need more time to converge upon. Not sure if I can tweak this or not. Thanks for your help and suggestions though, I'll keep digging into the issue and see if anything else helps me out.

Pumping the pedal hasn't worked for me yet either.
Try this method.


Flash car
Turn off ignition
Turn on ignition do not start do not touch gas pedal wait 20 sec
Turn off ignition
Turn on and start do not touch gas pedal
Let idle for couple of minutes till it off cold start and rpm drop to normal idle ie 700 rpm
Turn off ignition
Restart wait for idle to go back to 700 rpm then drive note this is first time you touch gas pedal

[Kodename47]

Originally Posted by R2

I should add, this is not a problem with the OFT, obviously, but an issue with either my vehicle or my expectations.

Then I reckon something else is at play. What are your LTFT after a week or so?

[R2]

Originally Posted by Kodename47

Then I reckon something else is at play. What are your LTFT after a week or so?

http://datazap.me/u/r2/stage-156-may-24-14


That is my latest v1.56 log before going to the 1.60 beta, but I had the same long term deadband then as now. Happened with the one time I went back to the stock tune as well.


Once the throttle plate starts moving past 0% the engine response feels normal. With regards to the LTFT idea, I have to admit am a little ignorant about how the LTFT's could cause the deadband issue.

[steve99]

Originally Posted by R2

http://datazap.me/u/r2/stage-156-may-24-14


That is my latest v1.56 log before going to the 1.60 beta, but I had the same long term deadband then as now. Happened with the one time I went back to the stock tune as well.


Once the throttle plate starts moving past 0% the engine response feels normal. With regards to the LTFT idea, I have to admit am a little ignorant about how the LTFT's could cause the deadband issue.

ltft looks pretty good.
If as you say the throttle responds as soon as you see the throttle position in the log move i suspect it may be a mechanical adjustment needed on the throttle pedal, probably a bit of freeplay if it does it all the time.

[R2]

Originally Posted by steve99

ltft looks pretty good.
If as you say the throttle responds as soon as you see the throttle position in the log move i suspect it may be a mechanical adjustment needed on the throttle pedal, probably a bit of freeplay if it does it all the time.

I'll have to take a closer look at the pedal to see if there is any adjustment there. Next time I flash I'll get down there with a ruler and measure the deadband and see how it changes over a few driving cycles. After a few weeks, maybe 30 driving cycles (WAG), I bet there is less than 2mm of deadband which is barely noticeable.

[JB86'd]

Can anyone link me to some dyno results (if they exist) of stock vs the most recent OFT tune on the same car? Either 1.59 or 1.60 I think? I've read most if not all of the OFT threads and can't seem to find any recent ones.

[DC2R]

Here is my dyno with 1.58 tune
K&n filter
Stage one tune
93 octane e10

Fwiw another FR-S with "full bolt ons" and no tune made 160 hp same night.

Sent from my SM-N900T using Tapatalk

[JB86'd]

@DC2R thanks for posting that! That's really impressive, especially with the high temp and humidity. I'll be on 91, but those results have me excited to order one soon.

[phrosty]

Originally Posted by JB86'd

Can anyone link me to some dyno results (if they exist) of stock vs the most recent OFT tune on the same car? Either 1.59 or 1.60 I think? I've read most if not all of the OFT threads and can't seem to find any recent ones.

1.5x is all the same, just for different markets of the car (USA, Australia, etc.).

[lucid215]

i did a log today on my 13 brz. im running the oft stage 1 map and my mods are takeda intake, invidia over pipe, invidia catless front pipe, and jdm trd exhaust. just thought i let you guys see how the car runs with mods and the stage 1 rom

http://www.datazap.me/u/lucid215/sta...g?log=0&data=1

[Fareast auto part]

Well I have had my OFT for two weeks now and I have to say that my impressions are very positive! The initial flash procedure was simple and straight forward (just followed the instructions on the web site) and on start up the car idled well however the car almost stalled when I first pressed the gas pedal. My initial impressions were that the startup noise is reduced, the idle is more steady and throttle response is improved. There was more engine growl at about 4000k, (cam timing changes?) which I liked however the top end did not seem quite as strong as before. My impressions two weeks later were "wow what a difference!" , it seems that the car must learn with the new ecu flash and now the throttle response is so much better than stock, the torque dip is reduced and on the top end the car flies. I would say that Shiv and the OFT are a combination that really works for our cars and the OFT is really worth the money. Next step is Phantom ESC combined with the OFT which I am really looking forward to.
Thank you Shiv!

[steve99]

Originally Posted by lucid215

i did a log today on my 13 brz. im running the oft stage 1 map and my mods are takeda intake, invidia over pipe, invidia catless front pipe, and jdm trd exhaust. just thought i let you guys see how the car runs with mods and the stage 1 rom

http://www.datazap.me/u/lucid215/sta...g?log=0&data=1

Looks ok apart from a bit of knock 5800-6800 judging by the chunks out of the kc learned value, if you log FLKC it should confirm the knock.

The takeda intake looks like its upsetting the maf scaling at low flow rates as your LTFT climbs to +17% when your off the throttle at the end and you can see it high at the start as well. If you log some lower rpm runs it should become more noticeable.