KTuner
Elite Sponsor
- First Name
- J.R.
- Joined
- Jul 10, 2017
- Threads
- 30
- Messages
- 2,795
- Reaction score
- 3,433
- Location
- Chandler, Arizona
- Website
- www.KTuner.com
- Vehicle(s)
- 2017 Si
- Thread starter
- #1
Hello fellow Civic X enthusiasts,
*UPDATE*
Thank you to everyone that tested and provided feedback. This is officially available today from the KTuner downloads page as an update.
Some testers noted that the aggressive on/off throttle without any rev hang was a bit much for their driving style, so we've also included a new Throttle Padding Quick Adjustment which allows for a medium and soft throttle padding setting beyond the standard one.
We're also testing these settings on CVT to aid with decel and may make that available if the feedback is good. Thanks everyone!
*END UPDATE*
It brings us great pleasure to announce a resolution to one of the most annoying issues plaguing all manual Civics... "Rev Hang". You all know what I'm talking about. This has been one of the most mentioned/asked about items we've seen to date!
After the throttle has been released completely the throttle plate is commanded to stay open a nominal percentage and slowly come back down to a point where idle control takes over. The blue arrows show the Throttle Plate Command decent after the throttle has been released.
At higher RPM after the clutch has been engaged there is a slight upswing in RPM (Red Arrow) due to the throttle remaining open this way. At lower RPM it may just hang at that RPM before RPM starts to decent. This creates the sensation of "Rev Hang", a nickname that has been rightly assigned to this behavior.
We have eliminated this behavior by adding a simple checkbox within the KTuner software.
The blue arrow points out that the TPS and Throttle Plate take an almost identical path after the throttle has been released. With clutch engagement there is no longer a kick upward or hanging of the RPM beyond normal inertia. It is an immediate kick into high vacuum which slows things down and with this higher vacuum this will decelerate the vehicle faster as well.
We have tried several different approaches to rev hang removal and feel this latest iteration is the least invasive approach to the way the overall system works together. It requires no other adjustments to settings and works well with all of our quick adjustments. It makes shifting in regular and aggressive situations much more natural, like it should be.
As expected with higher vacuum it does make the transition into deceleration more aggressive and going from deceleration back into normal operation more aggressive as well.
With this great news we'd like to open this feature up to the Civic X community for user feedback today with a beta version. If you're interested in providing feedback for any of our supported manual transmission CivicX ECUs - Si, Civic 1.5T MT, and Civic 2.0 MT, please contact us directly at [email protected]
And for those of you who don't have a manual transmission, we're working on plenty of other options for this platform. Stay tuned!
Thanks for your support!
KTuner
*UPDATE*
Thank you to everyone that tested and provided feedback. This is officially available today from the KTuner downloads page as an update.
Some testers noted that the aggressive on/off throttle without any rev hang was a bit much for their driving style, so we've also included a new Throttle Padding Quick Adjustment which allows for a medium and soft throttle padding setting beyond the standard one.
We're also testing these settings on CVT to aid with decel and may make that available if the feedback is good. Thanks everyone!
*END UPDATE*
It brings us great pleasure to announce a resolution to one of the most annoying issues plaguing all manual Civics... "Rev Hang". You all know what I'm talking about. This has been one of the most mentioned/asked about items we've seen to date!
After the throttle has been released completely the throttle plate is commanded to stay open a nominal percentage and slowly come back down to a point where idle control takes over. The blue arrows show the Throttle Plate Command decent after the throttle has been released.
At higher RPM after the clutch has been engaged there is a slight upswing in RPM (Red Arrow) due to the throttle remaining open this way. At lower RPM it may just hang at that RPM before RPM starts to decent. This creates the sensation of "Rev Hang", a nickname that has been rightly assigned to this behavior.
We have eliminated this behavior by adding a simple checkbox within the KTuner software.
The blue arrow points out that the TPS and Throttle Plate take an almost identical path after the throttle has been released. With clutch engagement there is no longer a kick upward or hanging of the RPM beyond normal inertia. It is an immediate kick into high vacuum which slows things down and with this higher vacuum this will decelerate the vehicle faster as well.
We have tried several different approaches to rev hang removal and feel this latest iteration is the least invasive approach to the way the overall system works together. It requires no other adjustments to settings and works well with all of our quick adjustments. It makes shifting in regular and aggressive situations much more natural, like it should be.
As expected with higher vacuum it does make the transition into deceleration more aggressive and going from deceleration back into normal operation more aggressive as well.
With this great news we'd like to open this feature up to the Civic X community for user feedback today with a beta version. If you're interested in providing feedback for any of our supported manual transmission CivicX ECUs - Si, Civic 1.5T MT, and Civic 2.0 MT, please contact us directly at [email protected]
And for those of you who don't have a manual transmission, we're working on plenty of other options for this platform. Stay tuned!
Thanks for your support!
KTuner
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