I could be completely wrong, but I don't think anything OTA would effect the tune. More than likely OTA updates are simply an update to the infotainment and other possible software updates. Things like the ECU tune that controls AFR and timing are firmware, which requires you to be plugged into the OBDII to make the changes.

That being said, I'm sure you'd notice the power drop off if the tune did get wiped from an OTA update.

 

An OTA update would be incredibly risky to do for the ECU. Brick the infotainment and the car still will drive. Brick the ECU and ...

 

Looks like the latest version of the Ktuner SW is 1.0.9.2. Here is the version history but it doesn't say the RDX is in it from what I can tell u

Version History

Version 1.0.8.5 is when RDX support was added.

 

the Software Version Description, or SVD, is just going to tell you changes from the last version. RDX was added in 1.0.8.5 and there have been no changes for RDX since then. I did not see a date next to the version on the website, am I missing something? That is somewhat important.. just say'in

They update quite a few vehicles, with all sorts of enhancements, which may make into the RDX. hopefully..

 

I didn't see the tune in the version control list for the 2020 RDX but I don't know the associated ECU numbers and they are different than the 2019's. They were added about a month ago. Likely they might have just ported most of the tune over from the 2019 code.

From the times I drove it, the tune seemed pretty solid. I just wish the very solid midrange pull extended into the top end. It seems stock and tuned this motor is less of a revver than I would expect. Maybe there are some significant breathing limitation for high RPM HP. I've been tracking my car stock and it almost never shifts much beyond 6k at WOT.

 

Maybe a upgraded intercooler and intake when they become available would help it rev out more. plus upgraded down pipe

 

Update on stage 2 tune. The throttle delay is not gone. It comes and goes just like factory, but is less noticable. Again, this points to the tranny reaction more than the ECU tune.
The mpg of stage 2 tune did not change from factory tune. If you don't keep mashing that pedal, the tune keeps the car in as high a gear as possible and feels conservative, but it reacts faster from a mash. And when you mash, and you are moving, the turbo feels already spun up, or spins up faster/earlier, along with the 60 more lbs of torque.
I did not do any 0-60 times at this time. The published hp and torque curves should explain alot.

 

I am disappointed.

 

Yeah, so am I. It is a lot less though, just not gone. And again inconsistent.

 

FYI, I found my old OBDII scanner can read calibration identification. To my surprise, the ID is 5YF-A860. Not sure what's going on as my ECU part number is A87...

 

Side question here. If you go with the stage II do you need to keep the k tuner control gauge connected while using the car?

 

Everything can be removed after you load the tune. The Ktuner does have data logging capability though that can help you see what is actually going on such as knock counter to see if you have any issues with your fuel quality. For the v1_2 you'll need a laptop to collect and view this data.

 

Ktuner 1.0.9.3 is now available. It says it includes the 2020 RDX tune.

 

Ktuner version 1.0.9.4 is now available.

 

Can you check the ECU SW version in this release? It can be found in calibration ID under ECU info, if Ktuner software is similar to FlashPro.

 

What does Flashpro show?

 

ECU Version for Ktuner 1.0.9.4

 

Update.... ktuner 1.0.9.6 ecu version is A88.

 

Thanks for the info. For 2019 RDX, FlashPro has been using A88 since 3.4.8 from Nov last year. Just an observation, no good or bad as both systems eventually use the latest version from Acura.

 

Found this post from Derek@IMW comparing the two tuning options:

https://www.imwtuned.com/blog/what-to-choose

 

Seeing this list before in a post from Derek is what steered me to Ktuner for mine. Used Hondata on all of my previous vehicles, but for the new DI turbo cars Ktuner looks to be the best path forward.