G50 Speedo Output

Peter D · 02-22-04, 05:36 AM

Hi Guys,

Does anyone know how many pulses per revolution the standard Porsche G50 speedo output sensor setup creates ?

(Needed for speedo calibration).

Kind Regards,

Peter D.

flatchat(Chris) · 02-23-04, 12:04 AM

8
[img]/ubbthreads/images/graemlins/cool.gif[/img]

Peter D · 02-23-04, 04:05 AM

Flatchat - thanks mate, you just saved me from having to pull the dash out to try & figure things out !

Kind Regards,

Peter D.

dave harris · 03-13-04, 06:34 PM

I'm installing my speedo now - so 8 pulses - but what type of output is it (Hall etc?)

Thanks

dave harris

Peter D · 03-14-04, 02:11 AM

Don't quote me, but I think it is a Hall Effect sensor.

I am using a VDO speedo & it copes with :

a) Hall Effect standard
b) Hall Effect (with "open collector circuit")
c) Interruption Oscillator Sensor
d) Inductive sensor

The basic speedo connections are much the same for the first 3, so I took a guess & wired it that way - it actually worked !! The "open collector" version requires a shunt wire from term 8 to 6 - as I didn't put that in, it must be either a) or c). I seem to remember being told by an "expert" that it was Hall Effect, so hence the guess.

Kind Regards,

Peter D.

Bill Bayard · 03-14-04, 05:36 AM

Dave,

I used a hand held GPS, to set my speedo. My first guess

was a bit off(high by 30MPH+), but the GPS made correction

easy. It was REALLY fast for a short while! [img]/ubbthreads/images/graemlins/grin.gif[/img]

I believe that the code #(VDO), to get the proper speed,

was 6600.

Bill

gt40rick · 03-14-04, 06:39 AM

With my speedo you can set it several ways. If you know the code for the transaxle/wheels combo you just enter the code, you can start and stop it over a measured mile then the speedo knows how many pulses it gets in one mile, you can put your car on a dyno and adjust the speedo to match the dyno reading. I used the dyno method because I could calibrate it at 140 mph (manufacturer recommends calibrating at 2/3 full scale of speedo).

dave harris · 03-14-04, 01:39 PM

Thanks guys - "Hall" it is then.

dave

Lynn · 03-15-04, 11:26 AM

Dave and Peter,

I believe it is an inductive sensor, not hall. You should check with a Porsche place to be sure.

Regards,
Lynn

Peter D · 03-16-04, 10:52 PM

Oops !!

dave harris · 03-17-04, 11:01 AM

Hi Lynn,

Yep - I think you're right! Wiring makes much more sense that way!!

thanks

dave