Quote:
Originally Posted by automotivebreath
In addition the grooves on the back side of the intake valve surly have a negative impact on cylinder filling, no good when maximum performance is the ultimate goal.
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I was under the impression that the low-lift flow actually
increased due to the effect it has on the boundary layer. I'm pretty sure one of his PDF's mentioned somewhere around 40% increase. In addition to helping to vaporize the fuel.
Edit: Don't know where I got 40%.. It was 5%.
