Setting ls7 lifter preload, 7.315 checker plus preload?
Setting ls7 lifter preload, 7.315 checker plus preload? I've been reading and searching but having some difficulty understanding how this works. I'm running a TSP V2 cam(232/234 598 lift 112lsa), and my stock 243's milled .010, with a 3 angle VJ and stock gm gaskets(.051 compressed). I upgraded to ls7 lifters also. The engine is a stock bottom end ls2.
So I dropped a stock pushrod in and tightened the rocker down until I couldn't pull/push the pushrod up/down. After that point it took about 1 and a half turns to get to 22ft lbs. Then I took a homemade adjustable pushrod, and came up with 7.315 length at zero lash. With that being said, I add in my desired preload of .085, and come up with 7.4, the factory length.
My question is for starters am I doing this right? I only question it because I figured with the VJ and milling and ls7 lifters I'd end up with something other than stock. I can compress the lifters by hand and they spring back up, so that's why I did the push/pull thing with my fingers rather than setting 0 lash like I normally would. Anyone wanna throw their 2 pennies in?
So I dropped a stock pushrod in and tightened the rocker down until I couldn't pull/push the pushrod up/down. After that point it took about 1 and a half turns to get to 22ft lbs. Then I took a homemade adjustable pushrod, and came up with 7.315 length at zero lash. With that being said, I add in my desired preload of .085, and come up with 7.4, the factory length.
My question is for starters am I doing this right? I only question it because I figured with the VJ and milling and ls7 lifters I'd end up with something other than stock. I can compress the lifters by hand and they spring back up, so that's why I did the push/pull thing with my fingers rather than setting 0 lash like I normally would. Anyone wanna throw their 2 pennies in?
I understand that, but I guess what I'm asking is, since the lifters are new and I can push the pushrod down with my thumb, am I saying zero lash is when the pushrod is just barely tight between the rocker arm and pushrod? Again, my only reason for even posting this is because I find it off that I come up with needing 7.4 pushrods.
