ignition reference

[Brian Warburton, c/o Turbo Systems Ltd]

>But, back to the problem, you can easily get a laser cut wheel made of steel
>(or plastic) that can be made to your fancy. The cost will be < $50.00 QTY
>1. All you need is a DXF file from your CAD program, and you have it, dosent
>matter what shape or size. 
>
>Sandy

Two quick points here, firstly I'm pretty certain that a VRS sensor
won't trigger with a plastic wheel, it must be made of steel.
Secondly, you may find that the type of wheel that will interface
sucessfully with any given ECU in terms of teeth thickness, teeth
size, inter-teeth gap and mark-space ratio, is a function of the
VRS input circuitry in that ECU. For example, if the teeth are too
close together you may fail to detect a good clear zero crossing at
high RPM. 

In essence, I'd be very surprised if it didn't matter what shape and
size the wheel is. 

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Brian Warburton,   "Still searching for the perfect curve....."
email: bwarb at turbo.win-uk.net
                               Advanced Automotive Electronics Ltd,
                               Van-Nuys House, Scotlands Drive,
                               Farnham Common, England.  SL2-3ES
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