Valvespring recommendations for my setup?
02-17-2005, 05:17 PM
#1
On The Tree
Thread Starter
Join Date: Nov 2004
Location: Macomb Township, MI
Posts: 143
Likes: 0
Received 0 Likes
on
0 Posts
Valvespring recommendations for my setup? OK Guys and Gals, the time has come to upgrade the valvesprings on my Goat 
Here is my combination thus far:
Procharger P1SC-1 at 7 PSI currently switching over to 8-9 PSI
Stock Cam/Heads and all other engine internals.
I'd like to be able to run the motor to about 6500 (or 6700 if thats even possible (read SAFE) on the stock bottom end?) With these goals in mind would you go with:
A. the CC 105 lbs spring (IE 26915)
or
B. the CC 130 lbs spring (IE 26918)
Both would be using the titanium retainers, not that it makes a difference but I figured I'd throw that in there. Input is ALWAYS appreciated, thanks!
Here is my combination thus far:Procharger P1SC-1 at 7 PSI currently switching over to 8-9 PSI
Stock Cam/Heads and all other engine internals.
I'd like to be able to run the motor to about 6500 (or 6700 if thats even possible (read SAFE) on the stock bottom end?) With these goals in mind would you go with:
A. the CC 105 lbs spring (IE 26915)
or
B. the CC 130 lbs spring (IE 26918)
Both would be using the titanium retainers, not that it makes a difference but I figured I'd throw that in there. Input is ALWAYS appreciated, thanks!
02-17-2005, 07:16 PM
#2
Remember that as boost increases, spring pressure is reduced at the valve. If you have a 2.25 inch intake, there is roughly 4 sq. in. of backside valve area. If you run 9# boost, you reduce spring pressure on that valve by 4 x 9= 36# of reduced spring pressure, 69# won't control a 2.25 inch valve. Granted, 2.00 LS1 intakes are not 2.25, but you get the idea? I would go with 130's.
