Hey guys my car has around 65k on it. I am in the middle of doing a cam swap (GM847) and was wondering if you guys think it's ok to run the stock lifters. I have used the search button and see alot of people are ok with it. If there is any question on it then i'll just buy a set for 150 bucks or so thanks for any info.


Jason

 

If they look good, you might as well try them. Your new springs could be a factor on whether they work well or not. For a new set, I would be inclined to give the recently talked about new Cadillac lifters a go. http://64.65.63.61/forums/showthread.php?t=501293

 

i'm running the 918's

Jason

 

My stock lifters have held up just fine with the GM847 and Comp 977 springs, even after wrapping it up to 6700 RPM multiple times.

 

Depends more on the springs than the cam.

I just exploded a stock lifter with my 847 and the crane suggested springs. New OEM low mile lifters, now I probably need a new block. Bearings were toast, crank needs a polish.

 

I agree, I set up a GM 847 on a freinds car with K-motion K-800s and ate almost all the lifters, switched to comp Rs and it was fine (except for lifter noise...lol). But on another car we ran the 847 with some comp springs and ran the stock lifters just fine, the K-800s were at like 360 pounds open compared to the comp springs being like 300 pounds open (if memory serves.)

On my car I am running the K-800s with .050 additional height (from the recomended 1.84) with comp-Rs early style , still noisy...lol.