[Tom Vaught]

I was looking on E*ay tonight and saw that a guy was selling a "New in the Wrap" Mile Dial Carb kit for a Holley Carb. Very Proud of his part Wants $399 starting bid for the thing.
Good Luck to that guy. I guess the 7 kits that I have must be worth $2800 if he gets his price. Good Luck Fellow.

That being said I will talk a bit about the system as the guy was nice enough in his listing to have some pictures of the parts.

So the first picture is a picture of the box the kit came in, if you ever see one at a swap meet (they are still out there, maybe not NEW though).

The second picture shows some of the parts you got in the kit:
Two Metering Blocks
Two "Electronic feedback" carb bowls
One Pulse Width Modulated Solenoid Controller.

In the third picture you will see a close-up of the Controller.
It has a knob that adjusts the "Pulse Width" to the Fuel Solenoid from zero setting to 10 steps different from the zero setting. It also has a fixed slide switch that manually allows a fixed setting or a adjustable setting.

In the 4th picture you will see the wiring harness that hooks up to the Controller and the two Fuel Bowl Solenoids. It has a power and ground wire too.
There are directions to explain every step.

In the 5th (last Picture you have a close-up of the bowl and the Feedback Solenoid)

So enough explanation of the pictures.

So the idea was that you could take a Holley carb and change the air/fuel ratio "on the fly" while driving the vehicle, much like you can with a simple Fuel Injection System today.

The range of adjustment was 10 jet sizes. Typically you set the jets in the carb 2 sizes lean and then turned the knob two clicks to the right. Now you were at Stock Jetting for the carb.

So from that point you could add more fuel to the Power Valve System (above the PVCR Power Valve Channel Restriction Jet drillings by turning the knob).

So basically you had a adjustable "on the fly carb controller.

David Vizard, a famous Dyno Guy and writer of quality engine articles used a system in his dyno tuning. made for much fewer jet changes and fuel bowl removal operations.

I knew a Guy who was a "messenger" in the South West of the USA.
He had a dual quad 427 Mustang with two Holley carbs and a 4 solenoid system.
Two controllers. He had one controller for the Primary Bowls and one controller for the secondary bowls.

Why would he do this?

Because he also had a custom valve controlled open exhaust system.
(lots of those units are on the web. Think even PY at one time sold them).

So he opens up the exhaust and the engine goes leaner and then he dials in the high speed calibration into the carbs. He had ego sensors and Thermo-couples (like a dyno engine) on his engine. We are talking a Silver State race type runner but carrying packages at high speed in the desert country. These packages were not drugs but valuable Jewels to Stores where sending them thru normal UPS type mail would never work. And Cheaper vs hiring a Armored Car for the deliveries. (He also carried a pair of very short barrel shotguns).

I wish the guy luck in selling his Mile Dial kit for $399.
I have the Better Quarter Mile Dial Kits that, as I said, feed the fuel into the carb even if the power valve is closed. This is also what Vizard used.

Tom V.