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It's hard to say on the hole position, since they could have changed the inside structure as well - like the shape and postion of ball seat. But it certainly makes you think there is something different about the valve design. Also the higher bolt head could allow longer travel for the check valve spring. (Or it could be for easier installation)
Did you happen to measure the new bolts for the specs given in the manual for the old ones? (inlet size, ball travel, opening pressure.)
In the pictures, the 2 hole holes look larger than the 4 hole holes. In fact they look so much bigger that the total area of the 2 holes could be greater than the area of the four holes. Did you measure?
Gregg
Originally posted by cdelena
Perhaps it is the placement of the holes affecting flow. When I did mine I noticed they are positioned differently, and there is more than one caution about using the proper torque.
12-13-2002, 04:58 AM
