transam0486

iTrader: (2)

does 25/1000ths of an inch (1/40th) really make that big of a difference? i thought we had self-adjusting lifters?

i'm about to put my cam in and i don't know whether to get the 7.400" or 7.425" pushrods. input please....

243 ls2 heads. torquer2 cam (232/232 .595" .598" 112LSA)

bigboykilroy

iTrader: (48)

buy a pushrod measuring tool and measure your application.

Havok2

iTrader: (118)

best to get a length checker

67rsss

iTrader: (4)

Can make a huge difference in the amount of noise and chatter. You really have to measure, there is a HUGE thread on here about how important measuring for your app is.

transam0486

iTrader: (2)

have a link?

transam0486

iTrader: (2)

hmm ...

smokin91rs

iTrader: (16)

i would measure. i bought a engine off the forum used. the engine didnt pull past 6000 and cam was good for 6600. since i new all my springs were new since i just freshend the engine i did a compression test and had 170psi. which was a little low. so i backed the rockers off to zero lash and then had 200psi. becuase the pushrods were to long with the stock non adjustable rockers the lifter has too much preload and was hanging the valves open.
-i would measure there are factor like have the heads been milled and what gasket it all adds up.

transam0486

iTrader: (2)

ok. so i got the checker, i set it to 7.400" and installed the rocker, now what??? how do i know which size i need?

67rsss

iTrader: (4)

This is the method we used...

vettenuts

iTrader: (4)

This is how I do it assuming stock lifters which are forgiving to some degree. Something like Morel needs a bit more accuracy because the preload range is much smaller.

Link

transam0486

iTrader: (2)

thanks guys. ....i thought i could just set the adjustable pushrod to 7.400" and follow these instructions: link but apparently not. no idea i had to find TDC and everything. thanks

transam0486

iTrader: (2)

this is what i got after setting the adjustable pushrod to 7.400" and testing on 2 valves checking the wear pattern. ....but this is an incorrect way to check??

67rsss

iTrader: (4)

This is a shaft mount system, you cannot measure length by checking the wipe pattern. Your method is for a standard SBC. Since you have no adjustability, you need to change the pushrod length in order to get the lifter pre-load right. The method I showed above, or the method Vettnuts listed are both very easy, and pretty accurate.

transam0486

iTrader: (2)

thanks. appreciate your help

vettenuts

iTrader: (4)

There is a way to check the wipe pattern with the heads on the car, but you would need to install check springs. Photo's are kind of blurry but the pattern appears to be to the exhaust side. Then again, it may not be correct because of the way it was measured.