It was supposed to be a Stewart Warner, but I doubt it, no logo, not the right needle? Maybe from something industrial? It does go to 8,000 rpm. I'm assuming the round device is attatched to a distributor to sense the rpm? Well, hopefully someone knows what it is. Thanks - Karl
Hi, Back in the 50's I saw this in a GMC fuel truck with a Pontiac motor when I was in the military. That piece goes under the dist. cap aand the rotor goes on it. Could be SW commercial grade.
I have one with the same face and dial, but it has a friction drive on the back for direct reading onto a rotating motor,etc.
I am going to say industrial as well. Its 6V, an 8K tach in 6V is pretty rare. 80x100 is 8K right, where in the hell is my calculater.
It might be a problem finding the distributor that the orange sending unit fits. You can rule out any modern engines. Finding one for a Chevy will be difficult and probably expensive. Finding one for your particular engine will be extraordinary. I took one of these and mounted a modern tach inside the lower section. You can see the studs on the back that held the 2 pieces together.
I was actually thinking some sort of manufacturing machinery. The sender could have been mountd to an electric motor of piece of rotating equipment. Maybe a printing press, out presses at the Star could turn up that fast, but you were asking for problems if you ran them that fast.
Some Studebakers also used an insert between the distributor itself and the cap to run the tachometer. They may be worth checking out.
Not sure but it might be a Jones Motorola tach. They used to make them for all different types of application including submarines. They were the manufacturers of the Moroso tach back in the 60's when Dick's business was located in Greenwich, CT. Jimbo
Itsa Stewart Warner from August of 1955. I can't find it in my 1960 catalog, so I'm guessing it was not produced any more. Obviously a 6 volt. If you can find a number stamped on the tan sender I can probably find the distributor application.
Just what I was thinking. If thats for a commercial application, I'm an airedale... Nice looking tach.
If alchemy is correct (and I think he is), that cup should fit an early Chevy 8 ditributor. I just sold Dad's from his '57 and it had the same orange cup.
I think 57 race model Corvettes had an AC brand tach, plus Chevy was 12v since 1955. Studebaker was still 6v in 1955 and I recall Speedsters came with a tach in the dash. http://en.wikipedia.org/wiki/Studebaker_Speedster Read the wiki article that says they had a 8000 rpm SW tach. I think I hit it on this one.
A bit more thought. Your tach is far more common than your sender. Most of these tachs have become separated from their senders. I am sure that yours came from a Studebaker but it should fit an early Chevy V8, pre window cap. Stude used both Delco and Prestolite distributers. The Delco used the same cap as Chevrolet. Although there were two different numbers for rotors I have had better luck with the Chevy rotor on Studes. I don't know if the Prestolite was used with a tack. If so then yours might fit some early Mopar V8s. At any rate if you decide to modify your tach as suggested here do not discard the sender. There are people looking for them. They are a small generator that runs a motor in the tach.
The Delco distributors V8 Studebaker used were the kind that had a window to adjust the points, not the style used in 55-56 single point Chevy and the early 57-61 dual point distributors like used in Corvettes.
I have this one, on the back it has a dial with 1,2 ,3, 4, 6 pulses per engine revolution. can it be hooked up or modifide to run on my 1962 283 SBC? (2 terminal’s not mechanical drive).
Well shut my mouth. While lying in bed last night I got the feeling that I may have screwed up. When I got up this morning I pulled out an old Delco catalogue and sure as hell, I did screw up. 55 and 56 Commander and Presidents and 57 thru 59 V8's used the older clip on type Delco dist cap, along with 60 and 61 Hawk. Goes to show I'm losing memory cells faster than they grow back. Sorry for spreading misinformation in my previous post.
I also have one [a 760] but it's got the S/W logo on it with a 3 pin connector. Don't have a sender for mine. I was planning to pull it all apart and install modern guts in it but after buying a great tach with modern guts I think I'll just put it in the classifieds.
Its tough to remember everything at once Books are friends. Some later Stude V8s did use the one with the window. I'm not sure what years or models but at the same time GM was using them until Stude stopped making engines. They use the same cap as Chevys too. Something I didn't think of before is that distributer rotation on Studebakers is opposite from Chevrolet. I don't know if the tach sender cares which way it spins. Pontiac may be a fit too. Maybe Olds and Caddy. All worth looking at.
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