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218/229 .560/.560 on 113 with 1.85 rockers?

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Old 03-26-2004, 11:10 AM
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Default 218/229 .560/.560 on 113 with 1.85 rockers?
I have Comp 918 springs. Do you think .590 lift is pushing it?

These springs are supposed to be good to .625.
Last edited by Tech; 03-26-2004 at 11:25 AM.
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Old 03-26-2004, 11:21 AM
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Well are those lift numbers with 1.85 rockers?? If not the lift will turn out to be .609. So if those springs are good to that that lift you should be fine.
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Old 03-26-2004, 11:24 AM
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You should be fine. If you haven't accounted for the additional ratio, in my opinion a .609" lift is pushing the envelope with 918s. It looks like you've accounted for it, though. a 218/.560" lobe would have a pretty wicked ramp.
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Old 03-26-2004, 11:25 AM
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As it says in the subject. The cam makes .560 lift w/ 1.7 rockers. With the 1.85 it's going to put me about .590.



(.580 was a typo).
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Old 03-26-2004, 11:28 AM
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Try the math again, I'm pretty sure it is .609" lift with the 1.85RR. You're lifting it up there quite a bit.
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Old 03-26-2004, 11:29 AM
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Who was the cam grinder?
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Old 03-26-2004, 11:36 AM
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Lingenfelter sells it. I'm sure they don't grind 'em.

I was told the 1.85 rockers would had .030 to the lift?
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Old 03-26-2004, 11:39 AM
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Nope, it is a ratio.


(.560" * 1.85)/1.7=.609"
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Old 03-26-2004, 11:41 AM
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Ouch. Now I know why these things are junk.

So, should I be ok with this rockers and .609 lift? Should I dump the rockers and get shaft mounted 1.7s?
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Old 03-26-2004, 11:44 AM
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I would just go back to the stock rockers. They work very well for 99.999% of applications.
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Old 03-26-2004, 11:47 AM
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Ouch. Now I know why these things are junk.
At least you didn't have to clearance your heads to install them.
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