I have seen more companies making the Rev kits and I wonder if they are a benefit or just wasted money?


I'm getting ready to finish up the short block that I had built and I'm going to assemble the top end of the motor. It is a 26x-27x duration solid roller. The lift is around .750" and I'm going to be running the jesel comp series shaft mounts. The springs are Manley nex tex 221442-16. So I will be right at the max lift. I still need to buy the llifters.
So will the rev kit help the valve train or save the motor if I bend a pushrod?

 

What is your spring installed height? When you are running that close to max lift/coil bind - you need to measure each and every spring for the exact position that it will be in.

Use the ISKY Hard Anodized kit with their lifters. I have seen the rev-kits make power, but if the spring pressures are correct it will not make much difference. The kit will help your lifters live a longer life by keeping constant load on the lifter against the cam so they don't bounce and kill rollers.

Put screens in your valley too, if you break valvetrain components that keeps them out of the rotating assembly you can buy the kit from Moroso.

 

I will be pulling a couple springs off to put the light weight springs in to check piston to valve cleareance . When I do I will check the installed height but the shop that put the heads together know I was going with that much lift. I know the valve height was 2.100 with out shims So I have to see what the did.

 

Thanks machinistOne. I will check on the isky rev kit and lifters.

Anyone else with any experience on this subject?

 

I've been using the afr rev_kit for years. I think loading the lifters on the cam really helps on agressive lobe roller profiles. I run a dual spring on the afr head with a damper, and, the rev_kit load on each lifter. Extends the high rpm potential. B. (97ss - 383 - D1)

 

I never ran one and see no reason to think they are needed if the correct springs are installed in the first place. But again, I never used one and maybe don't know what I am missing.

Rich

 

I run the same AFR kit but I have beehives for the valves. I carefully deburred and dressed those rev kit springs before I put them in, though, and coated them with moly lube in hopes they wouldn't gouge up the aluminum holders - and that seems to have worked perfectly.

 

I use them on any solid roller engines I build. It keeps the lifter against the cam and gives it longer life. Besides that on anything I build with a solid roller in it, the cost of a rev kit is a drop in the bucket and i feel its a good investment for durability reasons. I always over spring my sr stuff pretty good too, it has made no performance difference for me.