Speed Sensor.

[barbagris]

Does anybody KNOW how many pulses per kilometer (or mile) the OEM speed sensor puts out?

I do not have access to a DYNO to test it myself.

I have a PCV I want to use to generate in "Map per gear" mode. To do this I need to have a speed sensor input. I have a GPS driven sensor already fitted (driving a second speedo) that I can configure to emulate (I hope). I'd rather do this than tap into the loom.

:reading:

 

[warp9.9]

Curious Chris by taping into the loom did you mean your trying to avoid tapping into the gear sensor instead of the speed sensor?

 

[barbagris]

Curious Chris by taping into the loom did you mean your trying to avoid tapping into the gear sensor instead of the speed sensor?

No Scott. I'm trying to avoid tapping into either - I simply do not trust the Triumph loom enough. I also like everything to be 100% reversible and invisible once removed. "Tapping" using posilocks etc - NEVER.

My experience of OEM electronics/electrics is that the wiring etc is designed to support the OEM specs and nothing more. Later on bugs start to crop up and they're ALWAYS where looms have been modified.

The power commander instructions for the R3 say use the pink speed sensor wire to get the SPEED pulse. The PC5 maps have a set of gear calibration tables that use a speed vs revs calculation to determine gear position. Power Commander however don't explain what the numbers mean. I guess not all bikes have gear position indicators. The PC5 does not use the OEM Gear Position sensor.

Sneakily you can only see the above tables if you have a PC5 connected to the computer running the PC5 software.

So if I know how many pulses per kilometer(mile) the OEM speed sensor puts out - I can tune a second speed sensor to emit exactly the same number of pulses as the PC5 expects. With the advantage that being a GPS driven sensor it'll be correct. The second speedo I have attached to the GPS sensor can also easily be recalibrated to match whatever I set the GPS to. The GPS sensor (Hummingbird electronics - Australia) I have has 2 separate output wires (but sharing the same calibration) which allows it to drive 2 separate units.

There are instructions on recalibrating the PC5 gear numbers but it requires a Dyno. And I don't have access (read there are none available to the public anywhere near) to one.

 

[warp9.9]

Ok, I am used to tapping into the loom from the Weggo unit, and Vampire unit means well, mine will never be stock again so when I get her tapping in will not hurt me much. Fortunately I have a dyno in the area. I do not know how good he is so I will go for a sweep test on HP and have him stick a sniffer up the pipe to see how close my base tune is. I have larger injectors so I do not max out the pulse width ratio in the ecu. So PCV will be a add on that is not really needed except its easier for the dyno guys to tune with.