Even though several company's make 1.25 valve springs that are good to the lift the 284 cam has (.507/.510). For example, the Crane 99846-16 spring is good to .540 lift and crane recommends this spring with several of there cams that have up to .525 lift. I don't want to machine the spring seat for larger springs because I'm sick and tired of waiting for my heads back from the machine shop, and I need my car project to be done NOW! School is going to start real soon (summer session) and I won't have time to dick around with stuff like this. Here's the specs on the cam:

.507/.510 lift

240/246 duration @.050

284/296 advertised

110 LSA

What 1.25 spring should I use with this cam? Would the 99846 work Okay? Is anybody here running this cam?

 

If Comp told me to do something a certain way, I wouldn't do it any other way.

 

they really don't last long when you talk that much lift and rpm.


http://www.competitionproducts.com/index.html
has a spring that will go .6

But, i would really consider 1.44"