Figured out how to Code out Rev Matching

[kitesurfer]

I inadvertently figured out how to code out rev matching in all throttle modes...

If you code for a Brake Depress to be Active and make the Clutch Depress Inactive for starting the vehicle the rev match will be disabled in all modes.

I also found this odd but you will still need to press the clutch with the brake when starting the vehicle even thought its supposed to be inactive...You just don't need to press the clutch as far down as when the normal Clutch Depress code is active.

FEM_BODY > TCM_STARTLOCK_BRAKE = aktiv
FEM_BODY > TCM_STARTLOCK_CLUTCH = nicht_aktiv

My guess is the rev matching becomes inactive because of the change made to the clutch position sensor through coding

[psedog]

That makes sense. Good find.

[Brosef]

Awesome. Been waiting to see if anyone would figure this out.

[dmnc02]

Originally Posted by kitesurfer

I inadvertently figure out how to code out rev matching in all throttle modes...

If you code for a Brake Depress to be Active and make the Clutch Depress Inactive for starting the vehicle the rev match will be disabled in all modes.

I also found this odd but you will still need to press the clutch with the brake when starting the vehicle even thought its supposed to be inactive...You just don't need to press the clutch as far down as when the normal Clutch Depress code is active.

My guess is the rev matching becomes inactive because of the change made to the clutch position sensor through coding

Great find! To confirm:

FEM_BODY > TCM_STARTLOCK_BRAKE = aktiv
FEM_BODY > TCM_STARTLOCK_CLUTCH = nicht_aktiv

Is this correct?

[muhri]

I guess because if you code brake active, this would be a DCT hence no rev matching and the DCT module would take care of it

[crashtestdummy81]

Not that I expect anyone to use it but how does this affect stop/start functionality (if it's being fooled into thinking it's DCT)

[Needsdecaf]

Can someone figure out how to make rev matching work in Sport plus as well?

[RickMonet]

Originally Posted by kitesurfer

I inadvertently figure out how to code out rev matching in all throttle modes...

If you code for a Brake Depress to be Active and make the Clutch Depress Inactive for starting the vehicle the rev match will be disabled in all modes.

I also found this odd but you will still need to press the clutch with the brake when starting the vehicle even thought its supposed to be inactive...You just don't need to press the clutch as far down as when the normal Clutch Depress code is active.

My guess is the rev matching becomes inactive because of the change made to the clutch position sensor through coding

Interesting - I expect this to be a popular thread as people have been asking for a way around rev match.

Just curious - have you tried coding off both Brake and Clutch on start?

FEM_BODY > TCM_STARTLOCK_BRAKE = nicht_aktiv
FEM_BODY > TCM_STARTLOCK_CLUTCH = nicht_aktiv

What is the result for starting (does clutch still need to be pressed) and rev match?

Thanks

[CanAutM3]

Great find

I guess quite a few 6MT owners will be very happy about this.

[Mandi90TT]

Originally Posted by Needsdecaf

Can someone figure out how to make rev matching work in Sport plus as well?

This x100

[fourtailpipes]

no one has ever been more subscribed to a thread than i am to this one.

[kitesurfer]

Originally Posted by RickMonet

Interesting - I expect this to be a popular thread as people have been asking for a way around rev match.

Just curious - have you tried coding off both Brake and Clutch on start?

FEM_BODY > TCM_STARTLOCK_BRAKE = nicht_aktiv
FEM_BODY > TCM_STARTLOCK_CLUTCH = nicht_aktiv

What is the result for starting (does clutch still need to be pressed) and rev match?

Thanks

I have not tried coding the both the clutch and brake out , others have perhaps they can chime in if it deactivates rev match also.

for full disclosure all of the coding I have had done was completed remotely (teamviewer) by a friend...I wish I comfortable at doing it myself, I just don't want to mess up something on the car. We really stumbled across this as a side effect as I was trying to code out the clutch depress so that I could make the clutch throw even shorter than what I currently have in place with BMS clutch stop. I'm glad I could share it because I know guys were looking deactivate the rev match. Hopefully someone can report back they got the same results after coding it.

[LuvMyE92]

Originally Posted by kitesurfer

for full disclosure all of the coding I have had done was completed remotely...

First of all, thanks to kitesurfer for finding and sharing this solution. Hopefully it applies equally to F30 models, since I've decided to get a 340 instead of an M3/M4. Simply because I can get a more comfortable ride in the non-M with smaller wheels and softer suspension. I'll miss all the other goodies... but I'm old and I think those ///M days are behind me.

Anyway, my question, which surely brands me as a complete noob poseur moron, is: how is this coding done? I have a plug and software purchased to code my E39, but I suspect that it's a bit out of date and won't work for the more contemporary machines.

I don't need a step-by-step tutorial (not yet!) but I'm curious what kind of software and hardware is required. Thanks!

[dmnc02]

Originally Posted by LuvMyE92

First of all, thanks to kitesurfer for finding and sharing this solution. Hopefully it applies equally to F30 models, since I've decided to get a 340 instead of an M3/M4. Simply because I can get a more comfortable ride in the non-M with smaller wheels and softer suspension. I'll miss all the other goodies... but I'm old and I think those ///M days are behind me.

Anyway, my question, which surely brands me as a complete noob poseur moron, is: how is this coding done? I have a plug and software purchased to code my E39, but I suspect that it's a bit out of date and won't work for the more contemporary machines.

I don't need a step-by-step tutorial (not yet!) but I'm curious what kind of software and hardware is required. Thanks!

The software (E-Sys + E-Sys Launcher + PSdZData) is available for free, just ask shawnsheridan nicely in this thread: Coding Software.

The cable you need is a BMW ENET cable, which you can get from several suppliers on eBay for around $20.

[LuvMyE92]

Originally Posted by dmnc02

The software (E-Sys + E-Sys Launcher + PSdZData) is available for free, just ask shawnsheridan nicely in this thread: Coding Software.

The cable you need is a BMW ENET cable, which you can get from several suppliers on eBay for around $20.

Thanks, did it! Hot dog, I'm getting excited...

[specracer]

Oh I hope this is true, and no downsides!!!

[Anchored]

Very exciting!

[fourtailpipes]

hopefully lots of guinea pigs here will do this right away so i have 6 months of historical accounts to pick through before growing the balls to try this myself in the spring. fingers and toes crossed for no unintended side-effects!!!

[kitesurfer]

Originally Posted by fourtailpipes

hopefully lots of guinea pigs here will do this right away so i have 6 months of historical accounts to pick through before growing the balls to try this myself in the spring. fingers and toes crossed for no unintended side-effects!!!

I left mine car coded with the brake depress for 1 day and no rev match ....next day coded back to clutch depress and rev match was back on

[fourtailpipes]

has anyone done this yet with the intention of keeping rev-matching disabled? i'm too much of a wuss to do any coding until i know plenty of people have done it for a significant period of time with no side effects. cautiously optimistic!!!!

[kitesurfer]

Someone try coding out the clutch depress (without brake depress) & please and report back if this also disables rev match

[RickMonet]

Originally Posted by kitesurfer

Someone try coding out the clutch depress (without brake depress) & please and report back if this also disables rev match

Right - I am curious the results when

Coding off both Brake and Clutch on start:

FEM_BODY > TCM_STARTLOCK_BRAKE = nicht_aktiv
FEM_BODY > TCM_STARTLOCK_CLUTCH = nicht_aktiv