I am getting ready to build a new engine and read an article about the stock roller lifters not being able to handle higher lifts and higher rpm's. Question is, how much abuse can the stock lifters take? I am planning on using the LT4 Hot Cam up to 6,000 rpm. Will they survive?

 

They will be just fine for anything your engine will ever put out.

I dont know exactly what your setup is, but 6k and stock valve springs dong make a good combination. How about a little more info on your setup?

 

Today I ordered a host of Comp Cams parts including Magnum pushrods, 941 springs (1.255 O.D. - .880 I.D. - 130# seat -385# open .550 max lift) , spring locators and 10 degree retainers and locks. Ported LT1 heads, LT1 intake with 1-3/4" headers will be sitting on an L98 short block with forged internals. Cam selection right now is the LT1 Hot Cam but that is not set in stone yet.

 

Swap master, Your springs have an open load of 285 pounds. You should be just fine because I run the Comp Cams VR23 springs (1.437" 130# seat 325# open) with .600 lift. I go over 6000 rpm's with no valve train trouble. My lifters are the GMPP hydraulic rollers.

 

Yeah, with the stuff you just ordered, youll be totally fine.

 

Ok, thanks guys.