The 60lb springs are designed with a rate that allows them to have a slighty higher pressure than stock when compressed (1.40), but a much higher pressure than stock when uncompressed. That way you have more force when the valve is almost closed to prevent floating, but not much additional force when the valve is open where you don't really need it. That saves wear and tear on your cam, lifters, push rods and rockers. Pretty cool design to me.

Just having better control over your valves, is well worth the effort of installing these springs whether you rev over 3200 or not. Remeber, valve float is when it's moving so fast that it bounces off the seat when it closes. You're getting a lesser amounts of that well before it bounces enough to hit the piston. Having better control of the valves is just better!

 

Yeah it's something I'm certainly going to do. I do think that I'll go with the springs from Hamilton Cams. They seem to be on top of their game even if they do cost a little more I'd rather have the extra security.

 

you can get the lever type comnpressor from carquest. about 40$ and then you dont have to deal with shipping and waiting. works good too

 

60 pounders were designed for exhaust brakes to keep the valves closed with the brake on. Not for keeping the valves from floating.

 

Perhaps true, but valve control is the real reason for the springs. Replacing valve springs is a proven high-performance that has been on-going in gas and diesel engines since the first person decided to up the rpm level of an engine to gain performance. This is rather proven technology.

 

Minor details that most people think aren't worth the extra effort, make all the difference between having a good engine, or having a great one. The small things add up!

 

Not ragging on you, but...

Very true, but it will allow higher RPM before it happens. Any valve on any engine can float, and springs do wear out. They can not keep the same seat pressure forever. If you want to spin anymore than 3200 on a 5.9 you need a way to keep the valves from jumping back off the seat. Or maybe its only my ol' 308000 mile engine that floats at 3200.

 

What I am saying is that 60lb springs raise SEAT pressure. When the spring is compressed as the valve opens the spring tension is near stock. Seat pressure doesn't keep valves under control with big Rs and high boost. I have 60lb springs in my truck right now but they will be coming out and Hamilton springs retainers and keepers are going in.

 

i have an all haisley set up in my head..... their springs and all....

 

Just had a look at the Haisley site, they seem to be on top of their game also. I haven't contacted Hamilton Cams yet to see what their valve spring kit includes, but it seems as though Haisley has the intake and exhaust springs in theirs and it's only like $140. I'd like to find out from Haisley what the springs are like if they're only like the 60# springs or better.