bugy

using a supercharger or turbocharger, and according to what cam's specs says about valve springs required, would a super or turbocharger ask for more valve spring pressure? or would be just fine with the ones cam requires?

Nitroused383

iTrader: (10)

There is a formula for this, something to do with the surface area of the valve and the amount of psi you are running. I can ask one of my buddies he knows.

bugy

could you? i'll thank you for that favour i hope you can get it and share it here
thanks

DeltaT

iTrader: (5)

Here's the workup and formula:

boost psi X the area of the intake valve face in square inches.

Area of a circle is pi 3.1415 X (radius of circle X radius of circle)

Or stated as

A = pi(rXr)

If you are running a 2.05" intake valve, then the radius = 1.025"

So the Area = 3.1415 X (1.025" X 1.025")

or

3.1415 X 1.05 = 3.3 (rounded up a tad)

So if you are running 15 psi of boost, then the extra force on the face of the intake valve is 3.3 X 15 = 49.5 pounds.

Since I like a little headroom to grow, I would, in this example, put a spring that was 75-100 lbs. heavy at seat pressure on this motor.

Jim

bugy

thank you!! sir