1.65 rockers
in your opinion what is exactly top of the heap. lunatis, comps perhaps. Harland sharp makes an excellant product especially for what they cost. what makes them so inferior? Harland sharp actually has a customer service dept and sells replacement rockers if you do break one. try getting yella terra to do that. btw i have seen just as many yella terras break as harland sharp.
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Verdad Gallardo Personally, I'd stick with 1.6'ers as it will give you some safety room.
BTW, OP, If you're looking at CAT rockers, don't bother. I had a set in my hands marked 1.65 and they measured the same as the Crane Gold 1.6's. When I noticed the pushrod/head clearance the same as with adjacent Crane rockers still installed, I measured them and quickly got rid of them. No sense in running an inferior part for no potential gain.
TECH Regular
Joined: Apr 2007
Posts: 420
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From: Kempner, TX
.20 is the max i would run to my max lift for spring at its installed height...funny thing is lifter preload has alot to do with your lift...if you got a cam that is .575 lift with your rocker you still got to factor in your pre load on the lifters .035 or so for normal preload that we all use..so guess what..that means your only running .540 of lift 
Seems logical doesn't it? Unfortunately it doesn't work that way.
Nope. I've read this mis-information before, but it "ain't" so. The amount of preload doesn't effect valve lift. There are things that do but preload isn't one of them.
No matter what preload setting you use, the lobe lift multlipled by the rocker ratio, less any deflection will lift the valve the same amount.
Jake
holy **** ***** the advice in this thread is horrible...
jake is right though and pat knows what he's talking about... I think key questions here would be what springs are you running, and what is the installed height? This will determine what a safe amount of lift is for you to run. Generic statements like 1.8 installed height, and ".20" from "max" lift don't work here, sorry.
jake is right though and pat knows what he's talking about... I think key questions here would be what springs are you running, and what is the installed height? This will determine what a safe amount of lift is for you to run. Generic statements like 1.8 installed height, and ".20" from "max" lift don't work here, sorry.
Seems logical doesn't it? Unfortunately it doesn't work that way. Nope. I've read this mis-information before, but it "ain't" so. The amount of preload doesn't effect valve lift. There are things that do but preload isn't one of them. No matter what preload setting you use, the lobe lift multlipled by the rocker ratio, less any deflection will lift the valve the same amount. Jake
