OK, Cotten, the answer wasn't too clear. How much oil passes between the ball and seat is a function of the space between the 2! (duh, Guy)
I was trying to say a smaller ball will create a larger opening between it & the seat than will a larger ball (all things being equal).
And a larger ball AND larger seat will pass more oil than a smaller ball and seat (all other things being equal).
But, the small differences between the ball dimensions quoted make it hard to SWAG the result (I mean, doesn't the smaller ball actually seat inside of where the larger ball would on a given seat?)
And, this all assumes that the ball & seat area are the only major restrictions on flow (ie the oil can get by the ball OK).
Is this any better??
PS: I'm sure those V8s also benefitted from the lesser oil pumping pressure by better timing as a result of less cam windup, plus the "free" HP effect.
[This message has been edited by Guy Winton III (edited 01 February 2001).]