In one engine (a 383 sbc), we have 981 comp cams springs.
Specs:
Installed: 105 lbs @ 1.700 inch
Open: 295 lbs @ 1.250 inch
Spring rate: 417 lbs/in
Coil bind: 1.150.

The cam only has a lift of .480 in/ex. So coil bind is not an issue here. The rpm rarely see's 6K, but often sees 5.5K. My question is this, I have stock studs on the heads. At what point do you need to switch over to the screw in studs?

Thanks,
Fred.

Fred,
You should be ok with those springs.

Thanks Bill.