12 volt ignition

[bill h]

Have a 47 Ford thats been converted to 12 volt. It has an electronic dist. I have a 47 dist. with an earlier cap (crab style). Which distributor condenser should i use and which coil Thanks

[JSeery]

Am I reading your post correctly:

You have an electronic dist.

And, you also have a 47 dist with a crab style cap.

Now, which distributor (if you in dead have two) are you asking the condenser/coil question about? Or is the 47 distributor converted to an electronic pickup?

[bill h]

Sorry for not being clear. I want to replace the electronic distributor with a points distributor for better advance. it is a 47 distributor with a crab type cap. I need to know what to run as a condenser and what type 12 volt coil to use . Thanks

[Drbrown]

Good discussion to have with Bubba. I understand points uses a different coil. My '47 has a fine-running electronic using crab style distributor. No problems with ignition advance. Bubba made a complete spare set-up for me.

[JSeery]

Originally Posted by bill h

Sorry for not being clear. I want to replace the electronic distributor with a points distributor for better advance. it is a 47 distributor with a crab type cap. I need to know what to run as a condenser and what type 12 volt coil to use . Thanks

First you need to decide how you want to wire it up (for the coil part). You can use a coil with or without a ballast resistor. There are some advantages to using the ballast resistor (that why the OEM used them) but it will work fine without it. One advantage with a ballast resistor is to wire the coil so the ballast resistor is in the coil circuit any time the engine is running but by-passed during starting. This is very simple wiring and done with the starter solenoid. This gives you a hotter spark when cranking the engine over to start.

Without the ballast resistor the best coil is the Bosh Blue coil which is about a 4.0 ohm coil. With a ballast resistor you need a 1.5 to 2.0 ohms coil with the ballast resistor making up the difference (an additional 1.5 to 2.0 ohms) for somewhere around 3.5 to 4.0 ohms total resistance in the circuit.

[JSeery]

Sponsored Links (Register now to hide all advertisements)

Bubbas new internet page has information on condensers (and a lot of other information)!

http://www.bubbasignition.com/condensors.html

Also thread on similar subject:

https://fordbarn.com/forum/showthread...ght=bosch+coil

And: http://www.ratwell.com/technical/BlueCoil.html

[BUBBAS IGNITION]

There would be no difference in the advance UNLESS it was a different brand name etc. The Ford crabs all have the same advance ( 11A assembly) ,if its a Mallory , pro comp or MSD thats a different story , but easily fixed with a tear down and adjust.....

Some more info:

http://www.bubbasignition.com/crab-42-48.html