checking push rod length?
Thread Starter
Staging Lane
Joined: Jan 2009
Posts: 88
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From: south dakota
checking push rod length? i just got done measuring push rod length on my ls1 using the comp cams adjustable push rod i am wondering if i should order 7.35 pushrods or different ones? my mods include prc stg 2.5 ls6 heads milled .020, torquer v3 cam (231/234 .648/.598), ls7 lifters, trunion upgraded rockers... here is what i came up with.
my intake valve took approximatly 9.5 turns to achieve zero lash which =7.275+.080 desired preload=7.355
however my exhaust valve took only about 9.25 turns to achieve zero lash which = 7.2625+.080 desire preload=7.3425
my qestion is should i go with 7.35 pushrods or go with something different? any input is appreciated
my intake valve took approximatly 9.5 turns to achieve zero lash which =7.275+.080 desired preload=7.355
however my exhaust valve took only about 9.25 turns to achieve zero lash which = 7.2625+.080 desire preload=7.3425
my qestion is should i go with 7.35 pushrods or go with something different? any input is appreciated
Lets look at the differences.
7.355-7.350 = 0.005" - intake
7.350-7.3425 = 0.0075" exhaust
Two things to keep in mind. First, the accuracy of the method is not good enough to worry about those small differences. Second, the tolerances on the pushrods are nearly the same as the differences. Bottom line, you really can't get much closer.
If you are confident in your measurements, the 7.350" pushrods should work fine.
7.355-7.350 = 0.005" - intake
7.350-7.3425 = 0.0075" exhaust
Two things to keep in mind. First, the accuracy of the method is not good enough to worry about those small differences. Second, the tolerances on the pushrods are nearly the same as the differences. Bottom line, you really can't get much closer.
If you are confident in your measurements, the 7.350" pushrods should work fine.
