Hi everyone. Does anybody have any solid proof of helping keep HP levels up with the addition of a rev kit on their engine?

My 350 is currently apart and I'm considering adding one when I put it back together in the next couple of weeks. It is a superram'd 350 with the 219 cam and 1.6 rockers. So far I have been shifting at 6000, but if I could squeeze a few hundred more RPM out of the powerband I'd be thrilled. I don't seem to have any valve float, but better safe than sorry is always good.

 

I would also like to know this. And what kind of difference if any at all would it make if you have some serious valve springs.

 

I've run the AFR rev-kit ever since I put on my AFR
heads.. In my case, the ref-kit didn't help the valve
bounce that was occuring with the STD AFR 1.437"
springs over 6000rpms.

In hindsight, I believe these are just bad springs and
should have been avoided.. (AFR actually has a
disclaimer about them online now...)

So the rev-kit can help as a spring ages or vary
in tolerances, but the kit shouldn't be used to band-aid
inadequate valve springs...

mike

 

... as in my case

When it approaches 6500rpms all I can think of is Scotty from Star Trek. "She can't take it anymore captain. She's gonna blow!"

Tim

 

I was wondering about the Rev Kits too, I am upgrading pretty much everything on the heads this winter (rockers, springs,rods...) and I seen the Rev Kit but wasnt sure if I needed it or if it would actualy help anything. If I get them it would be the comp cams kit being that all the other parts are comp cams anyways. Anyone know how hard they would be to install ?

 

If you look at the AFR site you will find the REV kits are only really good on all out race applications that run in the 6000 to 7000 range. You would be far better to just run good valve springs to match you application


Brian

 

I think the rev kit is a good idea for anyone who races their car. I used a rev kit on mine last season. Granted I was using a solid roller cam, 657/600 lift and buzzing to around 7000 but, I had a lifter go which bent a pushrod, but the pushrod stayed inside the spring of the rev kit.

They are not too hard to install and if the motor is apart anyways, I think it is good insurance.

 

Fastbird is right on the money. They are not needed for a street car under 6000 rpm but it can't hurt if you chose to use a kit on a street car.



Brian