More tach question

[Jgolden]

First, all praise to the group. Made a few adjustments per info here and great results.

I got the pyro (won't go to zero but that is anothe post) and the boost gauge and now looking for a tach. reading here they seem to be a problem to get working right. Any advice on type or brand?

Can a gas tach be modified for diesel? I know they run off the dist on a gasser, but. . ?

To show how new I am to this, I went on ebay and saw a listing for "US Marine tach" and since I was in the Marines a while back I thought, ok check it out , oh,ok Boat supply stuff.

Thanks any info.

 

[JLEONARD]

Marine = boat stuff = gold plated (high price) ... . perhaps that's why YOU were drawn to it???



OK, bad joke.

But most marine tachs work off of alternator pulses via an "R" terminal. Our alts do not have this terminal, but you can create one by connecting a wire to one of the rectiier leads located inside the back alt cover... . read the post a few days ago started by bgilbert for details on how to do this.

I went with this style because before I bought the Isspro model R85220 , I had a spare old boat diesel tach that I rigged temporarily.

You can also buy a tach that will use a sensor that clamps to the outside of the alternator.

Another option is one that comes with a bolt on crankshaft sensor.

So you have some options... unfortunately a gas engine tach isn't one of them.

Hope this helps.

Jay

 

[bgilbert]

JGolden, on the pyro issue, depending on the type, I have mine powered by ignition powered wire. It gets its power only when the ingition is in the start, run position. Once I shut the truck off, it drops to zero.

[Can a gas tach be modified for diesel?] Maybe but you dont want to use it. Our 5. 9 only revs to lets say top of 3K+-, most gasser tachs are higher than this, so you would only be using a small portion of the tach. I'm using Isspro's 3 3/8" alternator tach pn R85220R- its a 4K rpm tach-with a red pointer ha Jay!! Easy to hook up once you've been enlightened by Jay... You can buy these tachs from a local diesel shop or from one of the TDR vendors, they might not have it in stock, but if they are a Isspro or whoever brand dealer they can get it. Bill

 

[Jgolden]

Thanks folks, forgot what a good source the search is.