Quote:
Originally Posted by Megadan
http://chinariders.net/showthread.php?t=19200
Not the greatest pictures, and I can't show the area around the valves to well until I decide to disassemble it more, but believe me... these ports leave a lot to be desired. The exhaust port is especially terrible. The reduction in cross section at the valve guides is pretty bad and can easily be cleaned up.
Just to toss in my own head porting experience. A better flowing head on a weaker cam profile will always make more, and better power, than a poor head with a radical cam as long as intake velocity is maintained.
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I'd been told that by an Indian tuner many years ago. Then I found it out for sure after I owned an Iron Head 1000cc Sportster. Bad ports. Even with PP cams it couldn't breathe at anything over 4500 rpm. I was told it would cost $500, or so to grind out those ports. And $500 was not chump change back in the seventies...ARH