hufflepuff

I don't daily my rx8, I only go to and from race events, so uninstalling is not terribly practical. On top of that, I only got cutouts twice in 80 runs up the hills, never on the street, and never at autocross, so it's so infrequent that going back to stock is unlikely to reveal the issue with as little driving as I do

Slow*Jim

THey just released an updated version of Versatuner, you guys should see if it resolves the issue.

Steve@VersaTune

The issue has not been identified yet. We have not really received much data from those affected. It's hard to narrow it down without more specific info around operating conditions and calibration IDs.

Shaozhou Zhang

https://www.rx8club.com/rx-8-racing-...-track-269957/

this is thread may be helpful if you haven’t checked it already

wcs

iTrader: (2)

Bit of a bump.
Just purchased VersaTuner last week to port over my Cobb AP/ATR tune for my turbo charged RX8.
Basically it was a straight copy and paste and I was up and running.

The VT software has a great GUI and nice features to compare values from on tune to another.
There's enough logging features to be useful. (I love my MegaLogViewer HD software, but I know VT isn't try to compete with that package)
The Live Dashboard is nice though live tracing would be nice.

Only 2 issues I've had (and I can't really blame VT on the first one) was with the ODBII Link SX cable.
My windows software wouldn't recognize the cable so I needed to manually install the virtual com port driver software manually from the manufacture site.
(and)
The data logging for Desired air to fuel ratio seems jacked. I'm still looking in to this tho, it may be me as I've only had the software a few days.

So yeah. I like it. Happy camper.

beernose

Agreed, In open-loop, my actual AFR seems to be right where I put it in the air-fuel-ratio tables, but the "Desired AFR" is way up near 14.4 or 14.7 all the time. If I am in closed-loop, then the PCM adjusts the actual AFR to that higher Desired AFR. Very weird. However, that may not be a VersaTune issue, might be something about the PCM and what that value means.

I did a test where I set ALL of the air-fuel-ratio cells to a single lambda value (ie 0.85, 12.5:1) and set the closed-loop RPM limit to 1000. So everything above idle was open-loop. As I drove, almost everything stayed near 12.5:1. But the log showed Desired AFR of 14.4/14.7.
I took that same tune and moved the closed-loop RPM back to normal (6000) and drove around. In closed-loop, it kept my AFR near the "Desired" 14.7 almost the entire time and ignored my air-fuel-ratio cells I had set to 12.5:1. My fuel trims stayed near zero (+/- 4 but hovered around zero) so my MAF calibration seems right.

Brettus

iTrader: (2)

Just gunna put this out there for those using Versatuner . I've been experimenting with the launch control and no lift shift features.
My findings so far :
No lift shift ..... kinda works but not to the point where I'd consider it useful . When you are using it, it doesn't really save you any time when shifting and I find it tends to interfere with normal shifting when you're not using it. Overall ...not a feature I'd use as my normal gearshifts are faster and more enjoyable.
Launch control ....Works ok but can only be used in conjunction with NLS (which I'm not a fan of) so wont be using this either.

Anyone else care to give their thoughts on this?
Maybe I'm 'doin' it wrong' ?

beernose

Agreed. When we bought VersaTuner back in 2019, there was a discussion thread at the time that their code had a bug in it which was leading to the ECM restarting while some guys were racing. So when they fixed it later, we gave it a try and as you said.....a little "wonky". We don't activate that feature at the moment. Its an everyday driver. As I always say....just develop the skill to shift fast instead of the ECM carrying you.

hufflepuff

On a sticky site with warm rubber, I rev to 7500-8000, dump it and go! Big fun.