The Ford Barn

demingboy · 02-18-2021, 09:55 AM

So what I am trying to understand is why the stock distributer will not work when you change to a new manifold and carburetor. I am wanting to use the small 390 cfm holley carb.
The motor is a 1951 ford 239 . Will switch to the petronix electronic ignition, using their coil and the recommended wires to plugs. Will remain 6 volt.
What I am un sure of is why the difference in vacuum created by my stock manifold and carburetor is different from new installation.
I have the ability to use either ported or manifold vacuum for the advance on the distributor so I am a little confused.
Also might admit I am not the sharpest tack in the box lol.

02-18-2021, 09:55 AM	#1
demingboy Member Join Date: Oct 2020 Location: Cozumel and Deming N.M. Posts: 87	ported vacuum So what I am trying to understand is why the stock distributer will not work when you change to a new manifold and carburetor. I am wanting to use the small 390 cfm holley carb. The motor is a 1951 ford 239 . Will switch to the petronix electronic ignition, using their coil and the recommended wires to plugs. Will remain 6 volt. What I am un sure of is why the difference in vacuum created by my stock manifold and carburetor is different from new installation. I have the ability to use either ported or manifold vacuum for the advance on the distributor so I am a little confused. Also might admit I am not the sharpest tack in the box lol.