Aussieveedubbers

Vehicle Speed Sensors

Jenny · 2004-11-25T02:41:46+00:00

I know this topic has been discussed a few times before, http://www.aussieveedubbers.com/forum/viewthread.php?tid=18813 http://www.aussieveedubbers.com/forum/viewthread.php?tid=20690 http://www.aussieveedubbers.com/forum/viewthread.php?tid=24025 but I just saw your post Brad where you said you are using a VDO sender, Part No 412.009 to derive the VSS signal from the stock VW mechanical cable. I had a look at the data sheet for the sender and VDO says it produces 8 pulses per revolution. The Subaru manual says their sensor produces 4 pulses per revolution. So does the VW cable only turn once every two wheel revolutions (to produce 4 pulses from the VDO sender), or are you using a frequency divider to reduce the 8 pulses down to 4 or are you just supplying the Subaru ECU twice the number of pulses per rev (eg. 8 instead of 4)? Will this sender still work for speed limit version Subarus or will it bring the limiting function in at half the speed?

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subaruboxer Officially Full-On Dubber

292 posts · joined Jan 2005 · 2 Sep 2006, 7:20 pm

#529471

I am using a VSS that bolts directly to the speedo of my beetle.
I was standing at a traffic light, as I was thinking about the VSS, when a taxi (cab) stopped next to me. And thought: how are they getting the taxameter running?
I knew of a taxi workshop just a few streets away, went there and asked for it! They had several differnt types.
I took one that I thought would fit the speedo of my beetle and it turned out to be just the right one!!!
It gives only two signals, but it seems to be okay for the ECU. It is a METRON unit.

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flat_iv Seriously Crusin Dubber

107 posts · joined May 2005 · 7 Sep 2006, 11:44 am

#531649

I know that VDO has a 16 pulse vss that the stock vw speedo cable screws into but with that many pulses wouldnt that start to interfere with the rev limiter or the ECU controlling the air and fuel mixture?
What does everyone think about using a barrel type hall switch? Tap a hole into the front spindle and have the hall switch read the webs inside of the rotor. There are 4 webs. Looking at the rotor the webs taper from the inside of the rotor to the outside. The only modifications I can see is if the hall switch didnt see the webs because of the taper. The solution would be to machine a small flat on all webs.

Richard