Cam Motion said to use springs that were 260# on the seat, thier part # is K950!

 

The cam was fine at all rpm ranges. Don't expect that cam to make any power at 2000 RPM but it never had bad manners.

I run TONS of spring pressure with solid roller cams. I have never hurt a cam bearing. It does NOT take more power to use a heavy spring. And when you skimp on springs you will damage valve train.

 

Well I guess my incident was a freek thing. As far as spring pressures go would you use a spring that has 650lbs. open pressure on a .500in. lift cam- Didn't think so. Just Use what the cam company recomends. Also you could look into a rev kit.

 

Statement like that demonstrate you have little understanding of valve train technology. The appropriate spring pressure is a function of cylinder pressure, RPM and cam profile. .500" lift by itself means NOTHING. Rev Kits are band aid fixes for people who don't understand valve train set-up.

 

It was supposed to be an exagerated figure for an example only!!!

 

None of this is personal.

I am posting the what and where I have been.
I know Don's knowledge surpasses mine, experiance also.

Don't be afraid of valve springs and "big lift".

 

Oh by no means am I scared, just wanted to make sure everything was ok with this before I order anything! I am trying to do this one only once!!! Thanks for all of your guys help with this!! Ray

 

Right-on!

 

If you order that cam, please buy HUGE pushrods. Your cylinder pressures are going to be extreme, you will bend pushrods, especially exhaust pushrods. I would not run that cam. I would run more exhaust duration. That's my spin on things, I'm done.

 

Don't give up on us Don.

I agree, I dont know if your P/R's can be too big.