Gear shift sensor & C125

Discussion and support for current Advanced Dash Loggers, Sport Dash Loggers and Club dash loggers

Gear shift sensor & C125

Postby fordpop on Fri Dec 05, 2014 3:35 am

I have a Hurst Quarter Stick shifter which shifts my two speed powerglide.

What sensor type could I use to input into the dash inorder to display the gear Im in - include park, neutral & reverse?

Also, what are my mounting options? On the shifter or on the trans itself?

A part number would be fab..:)

Thanks

Dave
fordpop
 
Posts: 16
Joined: Sun Feb 02, 2014 9:33 pm

Re: Gear shift sensor & C125

Postby David Ferguson on Fri Dec 05, 2014 9:59 am

Where are you located?

I would suggest an appropriate sized linear potentiometer probably mounted on the shifter end (but could be mounted on the other end of the cable -- it's just usually that is hotter/dirtier and it would live longer in the cockpit).

You wire the potentiometer to one of the analog voltage inputs on the C125, and configure the input for the channel "Gear Pos Volts", load the calibration "Dash Internal Battery Voltage".

You will use this channel to define the position of the shift lever using "Calculation->Gear Detection" menu. Select Method "Sensor", Make the output channel be "Driver Gear Lever" and the input channel "Gear Pos Volts"

Calibrate the sensor by moving the lever to each position (Starting with Park) and clicking the read value button.

Now, to turn the "Driver Gear Lever" position into a "PRND" Gear you will use a 2D table (menu: "Calculations->Tables...") The input will be "Driver Gear Lever", and the output channel will be "Gear".

Set up the table with the first column containing the position values you read in the gear calibration, the second column will contain the output gear. Here's the magic : For the Gear channel: Park ==-4, Reverse = -1, Neutral = 0, Drive = -5, and 1-9 will be gear numbers. Your table might look like this:

0.0 -4 (so the first position is Park)
1.0 -1 (Reverse)
2.0 0 (Neutral)
3.0 -5 (Drive)
4.0 2 (2)
5.0 1 (1)

Then configure the display to use the Gear channel. Whenever it see's Gear = -4, it will display "P" and "R" for -1, etc.

If you need help picking a potentiometer, please give us a call.

David Ferguson
Veracity Racing Data
Paso Robles, California, USA
http://veracitydata.com
David Ferguson
Veracity Racing Data
David Ferguson
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Re: Gear shift sensor & C125

Postby fordpop on Sat Dec 06, 2014 9:15 pm

Thanks for the reply David, very well explained.

IM based in the UK - if you ship here, I'd be happy to call you up.

Dave
fordpop
 
Posts: 16
Joined: Sun Feb 02, 2014 9:33 pm

Re: Gear shift sensor & C125

Postby David Ferguson on Sun Dec 07, 2014 2:40 am

While I can ship to the UK, the sensors I would likely supply come from there. I would suggest you work with someone local to you that can get Penney & Giles parts.

In general finding local MoTeC dealer / agent you can actually visit is the best advice for most end-user questions on "how do I hook up X and make it work."
David Ferguson
Veracity Racing Data
David Ferguson
Pro User
 
Posts: 1394
Joined: Fri Nov 07, 2008 2:45 am
Location: Paso Robles, California


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