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I already have the 906's w/ heavy springs/dampers. The aluminum heads are just a little rich for my blood at the moment.

Also, the engine ran strong with the 700cfm right up to 6500. At the suggestion of a friend, I tried both a 750 & 850, and after tuning them both, I found the larger carbs were not as responsive, and there was really no diff in the et's, so I went back to the 700.



Stick with it then.

I thought the 236s were the flat tops and 237s the quench domes, which is why I said you'd probably be lower compression above. As far as the compression goes, you have all the parts. Why don't you measure and figure out what it actually is? Did the shop take your heads and actually set the quench distance? If you have the quench set up right you might get away with 10:1 with the 509 cam.

Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street