[Vwdiesel] Diesel Tachometer in an older VW

[Tony and Lillie]

OK, Thanks Loren and Kurt. 

Now I'm begining to understand. I used the complete instrument cluster from the gasser 2.0 90 4-cylinder. So, it's not just a plug and play thing. I guess I was under the impression it was that simple. DOH!!

I also have to figure out how to drive the electric speedo, but that's not as big of a deal at this time. Just one thing at a time.

Tony




  ----- Original Message ----- 
  Subject: Re: Diesel Tachometer in an older VW


    Well, a gas tach gets 2 pulses (for a four cylinder) per crank 
  revolution.  An alternator is putting out however many pulses 
  (number of windings or maybe a multiple of the number of 
  windings) per revolution but it's turning at 2 to 5 times faster 
  than the crank!  The newer it is the faster they tend to turn 
  them for more amperage.
    There ARE workarounds. I just don't know them.  I know Jake 
  Russel built one.  There's a dab of circuitry and a pot to adjust 
  it.
      Loren