DeuceCoupe,

I was simply stating that the fastest time you recorded was with the Offy intake, @ least that is what you stated before.
Is this correct?

Also, if you get too big a cam ("not enough motor")
The Offy will out pull the Clifford down low & w/the Cliffford it will be playing catch up.
I ran that combo also, too big a cam & not enough compression = bad/wrong combo.

47Thriftmaster250,

good choice on the intake!
It would be a good idea to help w/the exhaust flow & install a 1.6" exhaust valve.

As far as unshrouding the valves, IIRC, you do not need to open the chamber up on the sides of the valves so much, it is more along the long turn radius side of the chambers on the spark plug side.
Good pic of this in Santucci's second edition pg 112..
This is where most of the airflows entering the combustion chamber.

It flows this way in a lot of cyl heads.

Here is my aftermarket cyl head that has a very nice port design on the short turn side & it still benefited & picked up CFM by opening up the chamber on the long turn radius side.

Not a good comparison of the heads, I know, but, just saying most cyl heads airflow seems to be on the long turn radius side.



MBHD



12 port SDS EFI