I was wondering about the autometer tacks part# 2888 alt tack. Just want to make sure it's readings are correct like a crank unit. $114.00 vs $320.00 from ispro wich is a crank unit. Give me some feed back guys Please Thanks TBoling

 

I run one on my 6.2 Chevy and it works fine, lets me know when the belt is slipping too. You might have to calibrate them somehow after installing though.

 

Dave (wannadiesel), runs one on his truck and it works great on it. I'm planning on installing an alternator based tach on my truck due to it being much, much cheaper than the Isspro setup.

 

I've been running an Isspro 3 3/8" 4000rpm alt tach for about 2 years. No issues, works great. Pic in my gallery. It was only ~$85.

 

I run the autometer tach. No problems with it.

I calibrated it using an optical tach at a truck shop. Only thing you notice is that before starting the truck the needle bounces around a bit because there is no signal (alt not spinning)

My truck doesn't have any factory crank pickup or wiring

Den

 

I want a tach but have decided not to use alternator since mine requires removing the alternator and doing some modification. Then when the alt. wears out or whatever, then I have to monkey with redoing it. R C

 

There is nothing really to do to the alternator. You just pop off the back cover and put a wire on one of the field nuts to the main rectifier diode. Once you have the back off its pretty straight forward.

I had a Motorola Alternator tach on my 89 and it worked great. Changing alternators was easy, took me longer to change the pully than the wire... This was about 5 years ago now.

 

You can get the Isspro tach and sensor(two magnet that mount on the dampener) for $130 and change from Dieselpage.com. $320 is way to high.

 

Thanks for all info guys,I like the 3in 3/8 ispro $85.00 thats a deal,Man that is cheap for a ispro crank unit $130.00 I will have to check that out. Some one is trying to make some cash off me I though $320.00 was really high. Thanks again TBoling

 

i run the #2888 as well in my 92 with no problems.

 

My tach, that has been on my truck for twenty years, is an Autometer that picks up from a sensor that straddles the seam between the two alternator halves.

This sensor is held on the alternator with a jumbo hose-clamp.

It was more like $30, when I bought it, way back in old timey days.

It has a screw adjustment for tuning in the correct reading.

 

I have the Autometer with the alternator pickup. Because there was nobody in town with a diesel shop tach and my brother is into model RC planes I used his prop tach. First I cleaned and spray painted my harmonic balancer black and attached 2 pieces of aluminum tape.

Then I got a couple of tywraps and used them to hold the throttle cable at a sufficiently high RPM so I could crawl under the front with the tach and a flashlight.

I had to shine the flashlight on the HB while aiming the optical tach at it to get a reading then I tweaked the adjustment in the back of the tach.

I think it takes a bit of fiddling with the position of the coil pickup on the alternator but that's easy to do. If you have a decent diesel shop they can attach a shop tach which makes calibration way more simplet than what I had to do but then I usually have way more time than money.

Edwin