Getting gear position form a manual gearbox without a sensor?

[Chris Wilson]

Is it possible to get gear position info into an ECU from crank RPM versus output shaft / propshaft / wheel speed RPM? I realise it could only extrapolate this when the vehicle was moving. Thanks.

[Scott]

Yes, this is possible. The ECU compares the engine speed to the wheel speed and has a 'Gear Calibration' mode to help set this up. Is this for a G4 or G4+ ECU?

[Chris Wilson]

G4 although I have not purchased anything yet. I am a lot more familiar with Motec, but was impressed by the ease of use of the software and the nicely running engine of an elderly Link ECU in a single turbo Supra MKIV, so have decided to give on a shot.I may need to reduce boost (torque) in some gears on a car with known fragile half shafts. Thanks for the reply.

[Dave Kriedeman]

Hi Chris,

this is definitely possible and in the Boost Control settings now.

Also there are settings for gear position settings/setup under CHASSIS and BODY Gear Detection.

Regards

Dave.

[bsh]

As Scott and Dave says, it is possible and works great. I had to use it on my Lancer Evo 2 to reduce tq to stop breaking my 4th gear...

[Chris Wilson]

That's great, I am downloading the software to have a fiddle with it, although I am no mapper I will want to install and wire it myself.

 

Funnily enough I too want torque reduction, in third gear in my case If I like the final build I will sort a stronger transmission,

but KISS is the goal initially. Thanks for the replies.