[jeepmj_tj]

Has any used any of the tachs that pickup a signal from the alternator. i have the Autometer Sport Comp Diesel Tach. It has a probe that straps around the alternator. Is this tach going to work good?

I really wanted to reuse my existing crank sensor, however im not using any of the existing computer and wiring from the 92 dodge. and the reason i went with the sport comp tach is because it matches all my Ultralite gauges. i dont believe I can rewire it to work with the crank sensor either.


Thanks

Joe

 

[Machman]

It should work about as well as any alternator-based tach. You'll need access to a photo tach or some other way to calibrate it initially, but lots of folks here have used alternator-driven tachs with good results.

If you want to use the crank sensor to feed it, you *might* be able to use one of the interface modules from Dakota Digital: http://www.dakotadigital.com/index....ategory_ID=287/home_id=59/mode=cat/cat287.htm

Nothing there specifically mentions what you're attempting, so might call them. And.. Might be cheaper to buy a tach that matches and can take the crank sensor feed.

 

[CrewCab59]

I have been using one on my truck for 8 years ,works like a charm ,you'll need a photo tach to check engine rmp and adjust the screw on the tach to set rpm.

Scott

 

[Paul(in NY)]

Has any used any of the tachs that pickup a signal from the alternator. i have the Autometer Sport Comp Diesel Tach. It has a probe that straps around the alternator. Is this tach going to work good?

I really wanted to reuse my existing crank sensor, however im not using any of the existing computer and wiring from the 92 dodge. and the reason i went with the sport comp tach is because it matches all my Ultralite gauges. i dont believe I can rewire it to work with the crank sensor either.


Thanks

Joe

I use the same Autometer on my Carryall. Works fine. Ditto on what Scott says. You will need a strobe tach or something to calibrate the Autometer.

Paul

 

[blakerj10]

If you know your gear ratio and transmission ratios, couldn't you just dial it in close enough? Calculate it based on speed, tire size and gears?

 

[jeepmj_tj]

If you know your gear ratio and transmission ratios, couldn't you just dial it in close enough? Calculate it based on speed, tire size and gears?

Thats what I was planning to do untill I can find someone with a strobe tach.

 

[Paul(in NY)]

You will probably be in the Ball Park with that method.

Paul