918s good for what lift?
08-16-2006, 09:56 PM
#13
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Originally Posted by 1slow01Z71
You are wrong coil bind is at .600 lift they wont go any further.
08-20-2006, 12:15 PM
#19
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Maybe they say .600 because you need some spacer to absorb the spring harmonics when cycling. The coil bind they list is the distance from a fully relaxed spring, that is not installed on a valve already, to totally bound down compression. A lot has to do with the installed height in the head. Due to manufacturing tolerances, GM and Comp, there has to be a safety level somewhere.
09-05-2006, 12:55 AM
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The Comp 26918's will control harmonics BETTER the closer you run them to coil bind.
However........spring life is GREATLY reduced.
Therfore , I think Comp limits the lift to .600 w/a 1.800 install height for longevity reasons.
Here's some math for ya.
1.8-1.085=.715 Installed height - coil bind
.715-.060=.655 Max Lift- .060 cushion
So by the math.....a 918 will handle .655 lift......but it won't live long like that.
BTW....I did this math in my head.......so if I messed up.....sue me.
However........spring life is GREATLY reduced.
Therfore , I think Comp limits the lift to .600 w/a 1.800 install height for longevity reasons.
Here's some math for ya.
1.8-1.085=.715 Installed height - coil bind
.715-.060=.655 Max Lift- .060 cushion
So by the math.....a 918 will handle .655 lift......but it won't live long like that.
BTW....I did this math in my head.......so if I messed up.....sue me.
Last edited by formulakid1; 09-05-2006 at 12:57 AM. Reason: adding to message
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