I bought a set of HP valve springs a few years ago from PAW ( too late to send them back ). And I measured them in every way other than testing the pressure - Wire dia, Coilbind height, Free height... And I could find no difference between the PAW HP springs and the stock springs that came off a flat tappet 350.
My question is, would these new springs be adequate for a small roller cam, about 192* /.420" in. 196* /.430" ex. ?

Or how about a slightly larger roller cam like the ZZ4?

Thanks for the help.

 

To really be certain, you'll have to measure the pressure at 1.7" and some lesser value to try to determine the spring rate.

 

It will be a while before I can test my springs for pressure cause I don't have the equipment.
Do the stock Caprice roller cam motors use the same springs as the older flat tappet 350s?
The caprice cam is the one I've got (specs above)

Thanks

 

You can check them for clearance (i.e. coil bind).

Bring the #1 cylinder to TDC and fill it with air or a 1/4" nylon rope to hold the valves up.

Remove rocker arms.

Remove spring retainers and springs on BOTH valves.

Install check springs in their place WITH the retainers you plan to use.

Bring #1 piston to BDC.

Put a dial indicator on the valves and measure the travel they have until the retainer hits the valve seal and/or valve guide.

Subtract the lift of the cam from that number. The clearance needs to be at least .050" (± .005").

While the valve springs are out, put them in a bench vise and squeeze them until they just start to bind. Measure them with dial calipers. Then back off the bench vise until the spring is expanded to the installed height (1.70" for example).

Subtract the closed height from the installed height to find the amount of movement in the spring. The difference should be AT LEAST .060" more than the lift of the cam.

However, this will not tell you the spring pressure.

 

Thanks for the reply, that's helpful.
So if they check out clearance wise, does that mean that I can use those springs with that cam?

Or another way of putting it might be, what springs are specified to be used with the above cam?

 

For that cam? I'm gonna go out on a limb and say stock ones would work. That's not a very aggressive cam. Actually, it looks a lot like the specs of the one Competition Products sells for $50, but yours looks even more lame.

For the ZZ4 cam, I imagine ZZ4 springs would work great. Go to www.sdpc2000.com and do a search.

 

Yeah, that's a pretty puny cam isn't it.
Seems to me like they ought to work too, just thought I'd ask around
Thanks

 

Back again-
I thought I'd do some asking around, and the tech guy at Comp Products (not Comp Cams) said that stock springs will work with their vortec cam, so they ought to work with a 9C1 caprice cam.
I might get the vortec cam. If I do, I'll leave some feedback.

Thanks for the replys