I've just bought a set of the 906's and want them to perform at their utmost. I've called several different engine builders and get a different response from each of them Some say port--others say to stay out of the port. Some say flat cut them .060 while again others have told me to have the water ports on the spark plug side welded (or pinned) and angle mill the snot out of them. Then I get one who says to put 2.02 and 1.6 valves in...And when you start talking about camshafts that compliment these heads---they really have different opinions. Internet search says they perform best ay 32 degrees of timing while one guru told me 36.
lets get to the bare bones about these cylinder heads---who has experience with them? What worked and what didn't work for you?
Thanks!!
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