This tach is on Ebay and I'm not sure if it will fit my 8/70 Z. I haven't pulled the dash to be able to compare it, but don't want to let it get away if it's the right tach. This is supposedly out of a 72 (no month provided). I haven't found anything in the archives about tach compatibility other than there is a 3 wire and a 4 wire tach and they aren't compatible. Will this tach work in my car?

Not sure if it will work, but keep in mind that it is a 40 year old device that is probably plagued by the same problems that yours has (assuming you still have one). Most of those that do still work are not all that accurate.

Kurt, yes, that is a 4 wire pictured. The key part is the inductive loop in the white wire. I think I'm still hoarding a spare just like it boxed up in the garage. As my parts cars were 4/71 and 10/70, both used the early style tach.

Edited February 9, 201115 yr by Arne

So I have a late 72. Would a tach from a 1974 260 be the same.?

Sorry for the hijack Kurt.

Edited February 10, 201115 yr by olzed

Thanks Arne!

Mine reads 8000 as soon as I turn the key. From what I've read there's a diode that can be changed, but another tach for a good price will work for me. I'll get this thing on the road yet - last good tags are from 87. Got it running, doing the brakes now. Once I can get it to go around the block, I'll start worrying about rpm's.

Lets see if the Ebay gods smile upon me....

Kurt,

You sold me a set of Series 1 guages on ebay a while back. I still have them all (and a few more sets now). Let me know if you need the tach.

John