Crane's website

Anyone know what kind of rpms you'll need to be turning to see the benifits, or am I late to the game?

 

Well from there own slide they don't claim a Hp difference until 5000RPM
Anytime they bury the 'big difference' in that many pages of crap and repeated pictures I really don't believe the hype. If it was so great it should tell me what it is in big letter in a heading I can easily find.
I always buy comp's XE stuff over crane anyway. Don't think their 'new rockers' are going to amount to much if any HP increase.
I'd stick to buying the biggest ratio you can get from a somewhat known company 1.8, 1.9's

My cheap harland sharp rockers seem to have all the roller/friction buzz and whistle stuff there new one has.

I like how they talk about the nose wheel to tip geometry. A to B to C.
But I didn't see where they talked about the other way it could go A to B back to A, which funny because the sure seem to like slides.

 

I think this has been rehashed either here or on LS1tech.com, do a search I think I "discussed" this with the Crane Cams guy on there.

It's basically dropping the back of the rocker arm where the pushrod seats so the arc of the rocker tip is in a different area on the valve. Also makes for a slightly shorter pushrod.

The theory is that it opens the valve faster at the begining of the lift curve.... well that's good if the valve can handle that but it also sets it down faster, which in a hyd roller can cause bounce. I still don't like the idea.

Bret

 

I was scratching my head on that one. Not sure if I beleive it or not. Not sure I want to be the first to try it.

My gut: if you want valve action to be more aggressive in the low-lift area, grind it into the cam. Besides, aren't todays cam grinds getting fairly aggressive anyway? Aren't manufacturers pushing valve acceleration rates way up compared to older grinds- even street cams that are designed to run tens of thousands of miles?