Stewart Warner "Yenko Tach"

[bkhpah]

There not! They attached them to the dash housings.

[COPO]

Brian, are you saying the chrome "foot" is in the 12 o'clock position and attached to the underside of the dash and sits directly above the steering column? How are the wires typically routed through the dash out the the monitor on the firewall? I'll likely just look at one at the Reunion on a car.

[bkhpah]

It was mounted to the side of the dash pod on a 69. In most cases anyway. Two screw holes in the side with one bigger one bored under those. The monitor box was on the firewall beside the trim tag on most. If you have an original tach car you should be able to see the installation holes in both. You can check out the holes at the reunion. I will bring pictures as well as a car.
BKH

[sYc]

I too will be glad to show you the original holes for the tach and moniter on my Yenko Camaro. I have removed the original items and installed a direct drive tach in it right now (for racing) so the holes are visible. Tom

[COPO]

I'm installing the Yenko tach on my COPO camaro. The car did not come w/gauges. I FINALLY found the correct monitor, now I'll find out just how high I've been shifting. Looking forward to seeing a few in person at the reunion.

[JoeC]

Which SW tach do you have? There were a few different ones. Some had a small diameter center in a all black face and some had a larger diameter silver center piece in the face. I have also seen different color needles used.

[bkhpah]

Let's try and set the record straight on the "YENKO" tach. There are two versions of the SW tach that Yenko would use. The model 977-J that was the pedistal mount series with the black face with 8K limit, and the model 970-B the custom face 8K unit. A black and white version of the 970-B was called the 970-J. All of these tachs required a ignition monitor box. The box Yenko used was a 990-A or the 990-D. Many types of SW gauges could be ordered as well. The Custom face line came in three versions. The "utility" which was a cheaper bottom pivot gauge at 2 1/32" diameter, the "deluxe" were a center pivot model at 2 1/16" and was more accurate. And the "racing" 2 5/8" was the top of the line. These were also available in the black and white versions. It is hard to tell what was used more, but I would think it was whatever they had in stock at the time. But after May, Yenko had the GM 7K unit and the center fuel gauge installed by the factory eliminating the need for the add on tach. Also it is important to note that Bill Smith (Yenko's head man) was dealing with Dixco at the time and some cars may have used this line as well. We are certain the the 70 Dueces used them. Now isn't that simple! Anyone else have other versions?
BKH

[COPO]

How was the Stewart Warner 977 aka Yenko Tach typically attached to the steering column?

[Edited by COPO (08-08-2000 at 07:12 PM).]

[COPO]

I believe it's a Stewart Warner 977 aka "Yenko Tach" It has the chrome cup and chrome mounting pedestal. Face is black, needles are red and yellow, 8,000 RPM.


[Edited by COPO (08-08-2000 at 07:15 PM).]

[COPO]

Brian, I think the monitor for a standard battery ignition is the 990-B. The 990-A is for a transistor ignition. The 970 tach is an in dash tach as opposed to the 977 which has the chrome cup and pedestal.

[Edited by COPO (08-08-2000 at 07:21 PM).]

[JoeC]

According to the original Stewart Warner installation instructions for the monitor: 990-A = Transistor ignition, 990-B= std. battary ignition, 990-D = Magneto ignition, there is no 990-C listed.

[bkhpah]

The 977-M is the panel mount the 977-J is pedistal with black face and a different sweep than the more popular 970 model. 970-C is a 10K Pedestal mount custom face. 970-B is the same only 8K. 970-K =10k black face pedestal mount. 970-J =8K black face Pedestal mount. 970-F =10k Custom panel mount. 970-E = 8k Custom panel mount. 970-N =10k Black face panel mount. 970-M =8K Black face panel mount. This is right from the 1970 catalog. The 990-D ignition monitor is adjustable and can be used with point ignition. Still confused? Just in case you wondered, price for a 990-B monitor: $4.03 990-D $8.05. Tach's, your choice 977 or 970 pedistal mount $52.25. I'll take a case of each please!
BKH