Originally Posted by Boost

I tend to agree with Branch Okeefe that the polished ports are to short to negatively effect Fuel atomization (on fuel injected engines). The port diameter, velocity and cylinder head temperatures also lead me to the same belief. I'd like to see a test done on a set of heads to document the affects of the polished finish.

Test 1. CNC ported heads. Flowed and dynoed

Test 2. The same heads, hand finished and polished ports. Flowed and dynoed on the same bike.

hell.. I have a set of heads Ill give up now for the test

Originally Posted by 46u

The main thing I do not like about branch heads is they polish the intake ports where most leave them some what rough to crate turbulence for better fuel air mixing. All so why most do not polish to a mirror finish on the intakes. Branch is the only one I know about that polishes them a mirror finish on the intake ports. There might be others just do not know of any others.

There is a long time great porter here in middle GA and he says for the most part CNC heads are pretty good. Castings this day and age are very similar. He did say on CNC heads some hand porting will make them some better you have to way cost out of what you want out of them.

Originally Posted by leafman60

Updating this old thread.

Does anyone have any current experience with the Branch O'Keefe headwork for a Twin Cam??

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