LS1TECH - Camaro and Firebird Forum Discussion

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-   -   218/229 .560/.560 on 113 with 1.85 rockers? (https://ls1tech.com/forums/generation-iii-internal-engine/153788-218-229-560-560-113-1-85-rockers.html)

Tech 03-26-2004 11:10 AM

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.

jay's99transam 03-26-2004 11:21 AM

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.

DenzSS 03-26-2004 11:24 AM

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.

Tech 03-26-2004 11:25 AM

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).

DenzSS 03-26-2004 11:28 AM

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. :)

DenzSS 03-26-2004 11:29 AM

Who was the cam grinder?

Tech 03-26-2004 11:36 AM

Lingenfelter sells it. I'm sure they don't grind 'em.

I was told the 1.85 rockers would had .030 to the lift?

DenzSS 03-26-2004 11:39 AM

Nope, it is a ratio.


(.560" * 1.85)/1.7=.609"

Tech 03-26-2004 11:41 AM

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?

DenzSS 03-26-2004 11:44 AM

I would just go back to the stock rockers. They work very well for 99.999% of applications.

DenzSS 03-26-2004 11:47 AM


Ouch. Now I know why these things are junk.
At least you didn't have to clearance your heads to install them. :lol:


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