Regarding jet size, I had tried .57 jets in all 3 carbs at a test and tune. After 3 passes the plugs were black and fouled. I went back to .53 in the center and .51 in the outer carbs. I have the accelerator pumps on all 3 hooked up. Maybe a bigger engine could use more, but this could be a starting point. It's just so darn hard to change the jets when the carbs are on the engine. I think my power valve is 6.5

  Dennis in Lititz PA

Cheap Gas! You holding out on us ? Where is it at?  $3.90 in NC

55Birdman  Hickory NC

Or maybe cheap gas??????

54 Victoria 312;  48 Ford Conv 302, 56 Bird 312
Forever Ford
Midland Park, NJ

The correct method for increasing jet size when doing away with the power valves is to measure the PVCR (power valve channel restriction) and add this area to the area of the jet size.  Measuring the PVCR and jet hole sizes with number drills will be the easiest way to make the appropriate adjustments.  The power valve channels in the Holley 94 carbs are typically pretty small so the increase in jet size will not be as big as when blocking the power valve in some of the later model Holleys.

Lorena, Texas (South of Waco)

There's something out there. Life?????

55Birdman  Hickory NC

Sam,

        There's really no correlation between the mechanical linkage and the power valve timing. One is controlled only by the right foot, the other by manifold vacuum. One thing you should think about is jetting. The purpose of the "power Valve" is to supply fuel at large throttle openings. The main jets are sized for cruise throttle openings. The power valve circuit ADDS fuel to the mains. If you eliminate the power valve by blocking it, you'll need to increase the main jet size in the secondary carbs six or eight numbers. That's a guess I would ask Dennis or somebody who's running  those exact carbs. Six or Eight would be Holley speak.

Frank/Rebop

Bristol, In ( by Elkhart) 

Proving once again, there may be life on another planet! Or, maybe not!

Frank/Rebop

Bristol, In ( by Elkhart) 

I have the outer carbs idle circuits closed but I still have the power valves in them because some time ago in a galaxy far far away I was told to always keep the valves in the carbs. I have bought some plugs and will install them after golf tomorrow. First things first you know. Will let you know what I come up with next week. Thanks for all the help Earl

55Birdman  Hickory NC

Sam & Bird.

         Theoretically (careful now) it would be better to use three and restrict the amount of fuel in each. That way the fuel gets to the end cylinders more quickly. But it's more complicated and may not really make any difference that you could notice. Tell you this much, If Dennis (Pinto Plumber) said to block the outer two off and seal up the idle circuits, I'd try that first. His truck works. 239's in 4000 lb trucks are not supposed to run in the 17's, and he's real, real close.

                    Frank/Rebop

Frank/Rebop

Bristol, In ( by Elkhart) 

I think it should stay in the piano.

55Birdman  Hickory NC