Roller Rockers w/cam

[Braeden Clark]

I recently rebuilt my magnum 360. I put in a comp 20-744-9 with .480 lift intake and exhaust. Stock heads and stock bottom end. Valve springs are upgraded with hughes 1110. I do have a little valvetrain noise. Machine shop said it's fine and that adjustable rockers could help vs the non-adjustable stock ones. Thoughts? I was thinking maybe go to 1.7 rollers. It would bring my cam lift to .510. That safe on a stock bottom end? Thoughts? Thanks. I do want the additional lift

 

[MOPAROFFICIAL]

I recently rebuilt my magnum 360. I put in a comp 20-744-9 with .480 lift intake and exhaust. Stock heads and stock bottom end. Valve springs are upgraded with hughes 1110. I do have a little valvetrain noise. Machine shop said it's fine and that adjustable rockers could help vs the non-adjustable stock ones. Thoughts? I was thinking maybe go to 1.7 rollers. It would bring my cam lift to .510. That safe on a stock bottom end? Thoughts? Thanks. I do want the additional lift

So the base circle is smaller than the stock cam, I assume. So now theres not enough preload.. right?
Stick a valve lash gauge between the valve and rocker...try .020... and stack them if need be till it quiets them one at a time.
Ex, say it gets quiet with about .030...just buy some .040 longer push rods.
Sure you CAN buy adjustable rockers arms...but you can still have too short a push rods and not enough adjuster to take up the slack/supply enough preload...then be back to square one.
Moral of the story...you still need the correct length push rods regardless if adjustable rockers are used or not.

 

[Braeden Clark]

So the base circle is smaller than the stock cam, I assume. So now theres not enough preload.. right?
Stick a valve lash gauge between the valve and rocker...try .020... and stack them if need be till it quiets them one at a time.
Ex, say it gets quiet with about .030...just buy some .040 longer push rods.
Sure you CAN buy adjustable rockers arms...but you can still have too short a push rods and not enough adjuster to take up the slack/supply enough preload...then be back to square one.
Moral of the story...you still need the correct length push rods regardless if adjustable rockers are used or not.

Do I measure that when the lifters are pumped up? Aka when the engine is warm?