Try out the new beta site for M3Post. You can read more about what's happening here
BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Today's Posts

Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications
 
Mporium BMW
Post Reply
 
Thread Tools
      03-25-2026, 09:56 AM   #1
former 240 s14
Lieutenant
former 240 s14's Avatar
559
Rep
511
Posts

Drives: 2008 E92 S65 Track Rat
Join Date: Jan 2007
Location: Cincinnati Ohio

iTrader: (0)

RPM Wire for S65

Hello Folks,

I am getting a shift light to add to the build for my track car and need to identify where the RPM wire is for the S65. I did search and google'd it but not 100% confident I have found it.

Can anyone point me in the right direction?

Thanks,

Rubin
Appreciate 0
      03-25-2026, 11:34 AM   #2
RocketyMan
Captain
RocketyMan's Avatar
United_States
772
Rep
883
Posts

Drives: E53 X5, E83 X3, E93 M3
Join Date: Nov 2022
Location: PNW

iTrader: (0)

Garage List
2008 BMW M3 E93  [10.00]
The KOMBI receives this information via K_CAN. There is no "RPM wire" on this platform.
__________________
2008 BMW M3 E93 MT, 3.15 FDR

R135
└┼┼┼
..246
Appreciate 2
      03-25-2026, 12:13 PM   #3
former 240 s14
Lieutenant
former 240 s14's Avatar
559
Rep
511
Posts

Drives: 2008 E92 S65 Track Rat
Join Date: Jan 2007
Location: Cincinnati Ohio

iTrader: (0)

Quote:
Originally Posted by RocketyMan View Post
The KOMBI receives this information via K_CAN. There is no "RPM wire" on this platform.
Thank you for the info. If there is no RPM signal then is there a way to add a shift light? Very newbie question but I am not a wiring/ecu expert.

Details on the shift light I wanted: https://ecliptech.com.au/shift-p2/?_...FVVMWvK37M00q2

Thanks!

Rubin
Attached Images
 
Appreciate 0
      03-25-2026, 08:23 PM   #4
Redd
Brigadier General
5039
Rep
4,842
Posts

Drives: 2010 BMW E92 M3 Dakar Edition
Join Date: Jul 2015
Location: Malaysia

iTrader: (0)

I think some sort of OBD shift light would be much easier...
Appreciate 0
      03-26-2026, 08:14 AM   #5
former 240 s14
Lieutenant
former 240 s14's Avatar
559
Rep
511
Posts

Drives: 2008 E92 S65 Track Rat
Join Date: Jan 2007
Location: Cincinnati Ohio

iTrader: (0)

Have to say great customer service from the vendor. Here is what he told me to do for the shift light:

Hi Rubin,

Absolutely. Used many times on M3 and a massive range of BMWs.
Use an ignition output signal, that goes to a coil. It is much faster and more accurate.

Cheers,
Tony
Appreciate 0
      03-27-2026, 01:09 PM   #6
smokinjoe64
Tailhooker
smokinjoe64's Avatar
4053
Rep
1,678
Posts

Drives: e92 M3 6MT
Join Date: Nov 2008
Location: OC SoCal

iTrader: (1)

Garage List
2012 BMW M3  [9.75]
2025 Mazda MX-5  [0.00]
2003 BMW M5  [0.00]
2024 Ranger Raptor  [0.00]
Quote:
Originally Posted by RocketyMan View Post
The KOMBI receives this information via K_CAN. There is no "RPM wire" on this platform.
Another easy access source - - 'Tapping' JBE CAN Hi & Lo wires also provides RPM among several other sensor signals...used by many AM gauge/displays.
__________________
e92 M3 - Interlagos Blue | Recaro GTs w/Fox Red Extended |Carbon Leather
BPM Stage II; SuperSprint: header-back, catless, nonresonated, F1s; Infinity Design CF intake; Partee Racing CF plenum; do88 coolers; Bilstein B16 kit w/EDC, monoball links; Brembo BBK; AutoSolutions SSK

Appreciate 1
      03-27-2026, 05:18 PM   #7
RocketyMan
Captain
RocketyMan's Avatar
United_States
772
Rep
883
Posts

Drives: E53 X5, E83 X3, E93 M3
Join Date: Nov 2022
Location: PNW

iTrader: (0)

Garage List
2008 BMW M3 E93  [10.00]
Quote:
Originally Posted by smokinjoe64 View Post
Another easy access source - - 'Tapping' JBE CAN Hi & Lo wires also provides RPM among several other sensor signals...used by many AM gauge/displays.
Just need a module that knows the specific signals to look at. I believe this is similar to what the steeringwheel race display does.
I think this would be the best option for OP.
__________________
2008 BMW M3 E93 MT, 3.15 FDR

R135
└┼┼┼
..246
Appreciate 1
      03-30-2026, 09:53 AM   #8
former 240 s14
Lieutenant
former 240 s14's Avatar
559
Rep
511
Posts

Drives: 2008 E92 S65 Track Rat
Join Date: Jan 2007
Location: Cincinnati Ohio

iTrader: (0)

Quote:
Originally Posted by smokinjoe64 View Post
Another easy access source - - 'Tapping' JBE CAN Hi & Lo wires also provides RPM among several other sensor signals...used by many AM gauge/displays.
Thank you for the reco! Unfortunately/fortunately all wiring is pretty easy in the engine bay currently as there is no engine, lol! Hopefully that changes next week.

Rubin
Appreciate 0
Post Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 06:48 AM.




m3post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2026, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST