The Ford Barn - View Single Post - Is a set of RotaBroaches worth the expense

tubman · 01-27-2016, 10:02 AM

I bought one 1 3/8" Blair Roto-Broach to open up the throttle bores on an aluminum Canadian 8CM manifold to allow me to use a Rochester 2GC carburetor. It cut the aluminum like butter. I would venture a guess that it would have worked just as well on an iron manifold. As you say, they are expensive. I think I paid $70 for the actual cutter and $40 for the arbor. Once you have an arbor, all you need are more cutters (still expensive).

So, in my experience they work very well; as to worth it, it's up to you. I paid the price because I could not find anyone that would tackle my project, so I had to do it myself.

01-27-2016, 10:02 AM	#2
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 11,629	Re: Is a set of RotaBroaches worth the expense I bought one 1 3/8" Blair Roto-Broach to open up the throttle bores on an aluminum Canadian 8CM manifold to allow me to use a Rochester 2GC carburetor. It cut the aluminum like butter. I would venture a guess that it would have worked just as well on an iron manifold. As you say, they are expensive. I think I paid $70 for the actual cutter and $40 for the arbor. Once you have an arbor, all you need are more cutters (still expensive). So, in my experience they work very well; as to worth it, it's up to you. I paid the price because I could not find anyone that would tackle my project, so I had to do it myself.