Valve Spring Question

[speedboi8]

I'm upgrading my head this winter, the head is out getting cleaned and decked. I'm going to be upgrading the springs and valves. I'm getting the BC valves & retainers. Do I need to verify each spring pressure with a spring tester, or can I just verify the installed height is correct?

 

[delta448]

Which springs will you be using?
What rpm will you set your rev limiter to?
What cams are you going to use?

 

[aspekt9]

He said BCs. also, I noticed you're relatively close to me too... let me know if you need any help with anything.

 

[speedboi8]

Which springs will you be using?
What rpm will you set your rev limiter to?
What cams are you going to use?

Brian Crower springs & retainers
7500-8000 rpms
Stock cams for now, upgrading to Kelford or HKS 272's at a later date.

 

[delta448]

He said BCs.

I'm getting the BC valves & retainers.

Valves and retainers, nothing stated about springs there. Maybe I should have assumed?

Brian Crower springs & retainers
7500-8000 rpms
Stock cams for now, upgrading to Kelford or HKS 272's at a later date.

You should be fine just going by installed spring height. If you buy Kelford 272's you might want to check spring pressure then, but I wouldn't worry about it yet or with HKS cams.

 

[speedboi8]

Okay, great thanks. What determines whether you should check pressures? By the way you answered it seems like the cam is the determining factor, why is that?

 

[95blackGsTurbo]

Ramp rate plays a big factor in whether or not you need to upgrade springs. HKS and Kelford have a lower ramp rate while BC has a high ramp rate that is why springs are recommended with all of there cams.

 

[aspekt9]

My apologies, I assumed he meant BC springs & retainers.

 

[speedboi8]

I see now. So as far as checking the pressure of each spring, is it safe to assume that they are all correct straight from the manufacture? Is it worth purchasing a spring load tester to verify the pressures are what they're stated in the technical specs from BC? I think at this point I'll just verify installed height and shim if needed.

 

[BogusSVO]

heres some info that you may find helpfull.....

http://www.dsmtuners.com/forums/newbie-forum/341209-4g63t-valve-spring-info.html

and

http://www.dsmtuners.com/forums/newbie-forum/341287-how-test-valve-springs.html