hello im putting a 95 cummins motor into a chevy truck all i have is the sensor that bolts to the motor above the flywheel now is there anyway to wire a aftermarket tach into that sensor or no? any help would be appriciated

 

easiest way to do it is to buy an ispro, autometer, tinytach, or run the chev alt on the cummins.

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or get the cummins alt rewound for a tach signal, alternator shops can do it. get it internally regulated while your at it.

 

How is the tach run off of the Chevy alternator?? My 1984 F350 had a Delco single wire alternator.

 

I don't know how it works, but that is how the stock 6.5 alt works, and several people have had the cummins alt set up by an alt shop for a tach signal.

 

The stock sensor on the cummins has 3-wires, power (which the PCM supplies either 5 or 8-volts,I can't remember but I know it's not 12) ground, and signal wire. As for the chevy I'm not sure.

 

Mag pick up triggered off the four crank bolts.
GM 4 pin HEI module NAPA TP45SB
W= positive lead from the pickup
G= negative lead from the pickup
C= tach lead
B= positive, ign on

 

daaaang that is a BITCHIN idea.

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what does one use for a mag pickup?

 

Auto Meter 5211 - Auto Meter Replacement Tachometer Probes - Overview - SummitRacing.com


This picture from CompD.

 

why dont you just use the chevy alternator thats i did. than your tach will work and itll be internally regulated. thats what i did it was easier

 

What if you don't want to buy a Chev alt and fab a bracket. With the alt hook up don't you have to do some kind of adjusting to get it to read the right rpm's?