1996 6 cyl tds rev counter- can a smiths rev counter be used ?

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  1. 1996 6 cyl tds rev counter- can a smiths rev counter be used ? 
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    neilmathews's Car Details
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    bit of an off the wall question- my tuned 96 e36 tds will soon be powering my classic car. The bm rev counter is electronic - so is the smiths unit in my classic which also used a 6 cylinder engine. anyone know if the relevant wires from the bm instrument cluster can be used to drive a smiths 6 cylinder rev counter? I guess power to the instrument would be 12 v in both instances, and the rev counter then amplifies the signal from a signal wire fed from the ECU? worth a go ? or incompatible ?
     
     

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    Anybody offer the OP any help?...
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    E36Coupe328's Car Details
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    Never mind the rev counter, tell us the important stuff, what's it going in?

    Having a diesel Interceptor or something?


    Your classic Smiths gauge, as found in many a Triumph or Jaguar, will typically be used to points meaning it is made to "expect" 6 pulses to 1 revolution or 4 depending on the source engine.

    A lot depends on whether or not you are using an RPM output from the management system and whether that is pulsing 6 times per revolution or whether it is going once.

    Now as the petrol E36 rev counters are allegedly not interchangeable between 4 and 6 cylinder because they read wrongly that implies the "conventional rules" to triggering a rev counter still apply, so if the diesel uses the same rev counter as the 6 cylinder petrol you might be lucky if there is an ECU output to drive it.

    Basically I would probably risk connecting it to an automotive meter that includes a switchable rev counter and see............

    Might damage stuff though - No warranty of any kind implied or given


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