Hook up a tach to a 6.2

[Rogue_Alphonse]

Don't feel like researching. It's one of those little Sunpro tachs I took from my Blazer because I converted to a tach-in cluster [that I made using the same kind of Sunpro tach]

[rcbildr]

It's been a while since I researched it, but I think to hook up a tac on a diesel is pretty spendy. IIRC there are 2 ways to do it...mechanically off the vacuum pump or electrically off the alternator. I can't remember what exactly is involved trying to hook it up mechanically I just vaguely remember it has to do with the pump. Electrically, there is a gizwidget you can buy that attaches to the alternator.

[rustyrodknocker]

I think you can just put a hall effect sensor or maybe even a magnetic pickup on the balancer they use them to read rpm on any thing that spins. Ive seen something of the sort adapted to old machining equiptment.

[rustyrodknocker]

this would be for a digital read out of course

[arrover]

I'm far from an expert but I have read quite a bit on it. You should search in the 6.2 section of dieselplace.com : http://www.dieselplace.com/forum/forumdisplay.php?f=20

Here is one way: http://www.dakotadigital.com/index.c...128/prd128.htm

Another: http://www.dakotadigital.com/index.c...rod/prd129.htm

Autometer makes a medium size tach that has a strap that goes around the alternator to get a signal. They also make a 5" diesel tach that comes with the sensor that reads from the ballancer etc.

Tinytach makes a digital tach but I don't think its round like a normal tach.

[Rogue_Alphonse]

Wow I never knew it was this much of a PITA.

[lindstromjd]

Originally Posted by Rogue_Alphonse

Wow I never knew it was this much of a PITA.

It's because of the lack of electrical output to make the engine run. I made a hybrid sender out of my vacuum pump and an HEI distributor like on dieselplace.com, but they're tricky and take a good day's worth of work to get it done.