Quote:
Originally Posted by Spec C Wannabe
Interested in your DIY Tuning as your result just turned out GREAT!!
What program or application did you use for tuning your car?
How did you manage to fix the Torque Dip?
I used to tune many WRXs in the past, so don't worry as I understand all those ECU tuning basics/ knowledges and terminology. I just need your kind sharing of which parameter to tune out the torque dip on the BRZ/GT86.
Did you do anything to VVTI (Variable Valve Timing) tables? Or you just tune the A/F and Ignition timing like normal tuning.
Thanks in advance for your kind advice  |
Thank you. Yes, the car runs fantastic and it's now a lot of fun to put the foot down from already 3000 rpm. The
Virtual Dyno curve depicted in the video is from the actual wide open throttle pull shown in the video. Bumps in the road will, of course, affect the result somewhat. I have, however, made several pulls that all show roughly the same results. I can't say (yet) how they will compare to actual real dyno graphs. I suspect they will look fairly similar, but will show a larger drop off above 7000 rpm, where I suspect the resolution of the logs is too low to provide accurate results. The torque dip is still slightly visible in the curves, but most importantly, not noticeable while driving.
As to "how" and "what":
I use a
Tactrix Openport 2.0 OBD2 adapter to flash with their software
EcuFlash 1.44. Editing of the tunes is done using
RomRaider.
The base of the tune that I am using comes from the free
OpenFlash Tablet tunes. They did actual dyno tuning of the FT86 in various configurations and made different tune available respectively. As an example for unequal length header on an otherwise stock car (same as what I have). Among a lot of things that they have tuned is the VVTI (or AVCS - active valve control system - as it's called in Subaru/FA20 terms).
These tunes have then further been refined by open source community. Most noticeably in the tunes by Wayno as you can read a lot about in
this thread. These improvements add up to around 50 tables that have been changed with minor fine tuning or large adjustments. There are a lot of (further) adjustments to A/F, timing, and fuelling compared to the OpenFlash tunes.
The tune I run is one of Wayno's tunes with a fair bit more added timing, as we have high-quality fuel in my neck of the woods (100 octane RON or approx 95 US AKI).