extrude honing

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anyone done this? what kind of results did you have good/bad? I'm looking to maybe do this to an efi intake for an engine i'm building. Any thoughts would be appreciated.
 
Is the planned project efi manifold a 300 ?
Very expensive, it works, but remember there are limits to what you can do with the Ford 300 efi manifold.
Might consider fabbing one using alum "J" or "U" bends probably cheaper.
If for V engine fab still a possibility if you can weld or have a good friend that can.
 
It's going to be a factory type efi manifold. I need to keep the smog nazis off my back. They start asking a lot of questions when they see custom stuff. I know it's expensive, but is it worth the trouble and expense? I'm looking for no more than 5000 rpm, but i would like an appreciable boost in the midrange area. I had a carb'd 300 years ago that did exactly what i'm after, but carbs suck for drivability, and I could never get all 6 spark plugs the same color, so i'm doing an efi version this time.
 
Just an "out there" idea - could you use coarse flap wheels on a very flexible shaft?
 
Addo you are a genius, should be easy enough with the efi being in two pieces. The coarse surface finish should give some increase flow by itself.
 
It's possible i suppose with enough time, but there's no way to know if the flow is balanced unless of course I had a spare flowbench. I like the extrude honing process and am still hoping someone has some experience with this.
 
I'd had the process done on the upper and lower intake on my old 5.0 mustang, and it made a big difference. Plug colors were quite a bit more even, and flow was improved enough that I had to go to bigger injectors (30lb, IIRC - this was 12-13 years ago)

IMO, it's well worth doing, but it can be quite expensive as a one-off. 5.0s were cheap, because they were set up to do them, no prototyping involved.
 
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