Setting Lifter Preload - Roller rockers
Thread Starter
Registered User
Joined: Mar 2011
Posts: 558
Setting Lifter Preload - Roller rockers
So I’ve read quite a few different methods of doing this. EOIC, etc. But my question to those who’ve done this is what is the simplest way of doing this procedure? Meaning the least revolutions of the crank and cam.
I’ll add that the guide plates aren’t adjusted yet, so I’d like to add that adjustment into the work flow. I know we shoot to adjust when the lifter is on the base circle. So my question is what’s the most efficient way of getting there.
Im working with flat tappet lifters (dry, not pumped up), 7/16” stud with polylocks, 1.65 stainless roller rockers.
I am getting the right rocker geometry with 2.8 turns of the polylock. .050” per turn with 7/16” studs. Lifter preload is right around .030”
thank you
I’ll add that the guide plates aren’t adjusted yet, so I’d like to add that adjustment into the work flow. I know we shoot to adjust when the lifter is on the base circle. So my question is what’s the most efficient way of getting there.
Im working with flat tappet lifters (dry, not pumped up), 7/16” stud with polylocks, 1.65 stainless roller rockers.
I am getting the right rocker geometry with 2.8 turns of the polylock. .050” per turn with 7/16” studs. Lifter preload is right around .030”
thank you
Last edited by VinMichael; Apr 17, 2018 at 12:53 PM.
Registered User
Joined: Jan 2010
Posts: 6,095
From: central Indiana
If you take the engine firing order and split it in half and arrange them to look like this
1843
6572
you will be able to figure out companion cylinders. Set #1 at TDC, you can adjust the valves on cylinder 1 and 6. Rotate the engine in the normal direction exactly 90*, set the valves on 8 and 5. Rotate another 90, set 4 and 7, another 90 and 3 and 2. You just set the valves with one turn of the engine. This is probably the easiest/fastest method. It helps to have a degrees balancer
1843
6572
you will be able to figure out companion cylinders. Set #1 at TDC, you can adjust the valves on cylinder 1 and 6. Rotate the engine in the normal direction exactly 90*, set the valves on 8 and 5. Rotate another 90, set 4 and 7, another 90 and 3 and 2. You just set the valves with one turn of the engine. This is probably the easiest/fastest method. It helps to have a degrees balancer
Registered User
Joined: Feb 2009
Posts: 11,878
From: Brazil Indiana
I am a little slower but I don't trust myself with the above. I have several friends that do it that way. I just start with hole 1 and go in the firing order one at a time. It ends up being two rounds of the crank.
Registered User
Joined: Apr 2014
Posts: 570
I've used this with AMC engines (same firing order).
http://www.pontiacstreetperformance....p/rockers.html
http://www.pontiacstreetperformance....p/rockers.html
Thread
Thread Starter
Forum
Replies
Last Post
