pushrod length?

[shmed]

well im trying to determine the length of pushrods i need]
i have a set of CC 8.200...
im using stock type rockers and a heavy duty type shaft
comp roller cam
i soaked the lifters in oil for a few days then installed them
then using a adjustable pushrod for measuring
i turned the motor over till the base of the cam was on the lifter.
and adjusted the pushrod till it had no up and down movement, and didnt seem to be opening the lifter up.
took out pushrod and measured..
did this to all valves.
heres the problem
drivers side 1 exh 8.138 pass 4 exh 8.132
1 in 8.151 4 in 8.142

2 exh 8.147 5 in 8.145
2 in 8.155 5 exh 8.140

3 in 8.148 6 in 8.132
3 exh 8.155 6 exh 8.132

now if i add 30 thou to these numbers thats the pushrod length i need correct?

how do i get these numbers closer to each other? i really dont want to buy all different sized pushrods.

file down the valve stems?
roller rockers?
thanks

 

[chrisgarrett]

I had the same problem. The difference may be caused by bad valves. Anyway, the simple solution is to order custom pushrods. That's what I did. The good news is I found a place that makes custom length for about $8.00 each. A great deal. Double check your measurement and give them a call and tell them what you need. Great service too.

http://www.mantonracing.com/index.html

 

[bison]

Adjustable rockers or pushrods are your easiest options.

 

[Ormand]

They don't need to be exact, within 0.030 will be fine. The way you measured, there is no length for preload, the added 0.030 will be the preload, and if preload is 0.060 instead of 0.030, the engine will still work fine. The vendors sell stock length, as well as stock plus 0.030, and stock plus 0.060. They are only about $3 each, not $8, and will work just as well as the custom pushrods, and better than adjustable ones. Poston has them, as well as other vendors.