11-02-2010, 12:06 PM
#615
(11-02-2010, 11:48 AM)300SD81 What kind of signal does a dyno expect? I can probably put something together to convert the tach amp output to whatever it expects.
My thoughts exactly. I think they look for the inductive "kick" caused by the ignition coil noise, so you could just put a bjt with a 10K pull up to 12V, invert it with another transistor if needed, and pull the signal off the collector with another resistor. If needed you could have a resistor hanging off the collector to simulate just a level shift instead of a pull to ground.
Conceivably a job for a ratshack 2n3904 and some strip-board.
1990 Power Ram 50 V6 SOHC 24V 6g72
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