Powermaster alternator

R

Red98

Member
I wish to purchase a Powermaster alternator for a 50 Merc flathead (the end of a 12v conversion).

Who has one mounted in front of a 4bbl Holley? I don't have that yet either and seem to recall the 4bbl mounts backwards on some intake manifolds for room.
I need verification the PM alternator isn't too long to fit. Also need to know the proper pulley diameter for proper charging.

And wonder about anything else I'm overlooking.

Thanks
 
They come in std and short versions.
Must be some drawings with dimension from Powermaster.
If i remember right the short clears a dual setup with margin...
 
Have you considered a Ford one wire alternator, the nice thing about these is a replacement can be found @ most all of the major parts stores nationwide.

Good luck and let us know how you make out.
 
If you are thinking of using the Powermaster that is made to look like a stock generator, think again. They squeezed a small car alternator into that generator-looking case. Mine burned out in 3000 miles. A local alternator shop found some parts that would fit and rebuilt it. We will see how long this version lasts.
 
Red98 said:
I wish to purchase a Powermaster alternator for a 50 Merc flathead (the end of a 12v conversion).

Who has one mounted in front of a 4bbl Holley? I don't have that yet either and seem to recall the 4bbl mounts backwards on some intake manifolds for room.
I need verification the PM alternator isn't too long to fit. Also need to know the proper pulley diameter for proper charging.

And wonder about anything else I'm overlooking.

Thanks
Click to expand...



I put an Offy/Holley 390 combo on my '49 and there is a clearance issue. Went with a conventional one wire alt.
 
Can't speak for the 8BA, but I used a 1" spacer to mount a Holley 390 on my '40 with a 221 cu. in.
 
You can slice a small amount off the back of a long powermaster without affecting looks and not loose cooling slots.
 
drolston said:
If you are thinking of using the Powermaster that is made to look like a stock generator, think again. They squeezed a small car alternator into that generator-looking case. Mine burned out in 3000 miles. A local alternator shop found some parts that would fit and rebuilt it. We will see how long this version lasts.
Click to expand...

I've had one on one of my cars since 2009. I had a problem one summer with a stuck brush, but powermaster repaired it and sent it back to me no charge. I drive my cars quite a bit also, so I would use them again.

That said, I learned about EJ Whitney generator/alternators from this forum, I've had one of theirs on another car since last summer. So far it works great and looks even more authentic than a powergen, so my vote would be to use one of them again. https://www.ejwhitneyco.com/automotive.html
 
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