http://www.youtube.com/watch?v=DxROQtv7 ... r_embedded
LOOK CLOSELY he OBVIOUSLY had the clearances wrong, look at the inner area where the rocker stud adjustment nut has worn a a significant polished area where it was badly miss aligned, now proform may not be nearly (TOP OF THE LINE) but looking at the evidences strongly suggests a clearance issue or geometry issue with the valve train was a major factor in the rocker failure. I see guys knock the parts manufacturers all the time and at times its valid, but many times when parts fail its improper installation, or lack of knowledge as to proper procedures or how to check clearances or geometry.
btw heres a better rocker design
http://www.youtube.com/watch?v=UrWK73ysF3Y
viewtopic.php?f=52&t=181
viewtopic.php?f=52&t=2746
viewtopic.php?f=52&t=689
viewtopic.php?f=52&t=196
LOOK CLOSELY he OBVIOUSLY had the clearances wrong, look at the inner area where the rocker stud adjustment nut has worn a a significant polished area where it was badly miss aligned, now proform may not be nearly (TOP OF THE LINE) but looking at the evidences strongly suggests a clearance issue or geometry issue with the valve train was a major factor in the rocker failure. I see guys knock the parts manufacturers all the time and at times its valid, but many times when parts fail its improper installation, or lack of knowledge as to proper procedures or how to check clearances or geometry.
btw heres a better rocker design
http://www.youtube.com/watch?v=UrWK73ysF3Y
viewtopic.php?f=52&t=181
viewtopic.php?f=52&t=2746
viewtopic.php?f=52&t=689
viewtopic.php?f=52&t=196