Max Lift

[Black00Sahara]

Does anyone really know the values for the 2000 valve springs (I assume they are the same from 97-06)

Max cam lift?
coil bind #'s?

any other pertinent info...

[Cheromaniac]

Does anyone really know the values for the 2000 valve springs (I assume they are the same from 97-06)

Max cam lift?
coil bind #'s?

any other pertinent info...

The springs are the same from '87-'06 and are rated to 0.43" valve lift. Installed height is at 1.64" but I'm not sure about the coil bind height though. I've read somewhere that it's 1.09" so if you allow a 0.050" safety margin, the stock spring won't bind at 0.50" valve lift but the spring won't have enough pressure to close the valve quickly enough without experiencing valve float.

[Retlaw01XJ]

Measured my stock 2001 springs... compressed in a vise, they coil bind (solid) at 1.121".
With an installed height of 1.64" , that leaves 0.519"..... subtract the 0.060" safety margin, and they should be good for 0.459" lift.
I don't know what the spring pressure is at that lift.
I'm running a Crower 44243 cam spec'd at 0.437"/0.445" lift. Stock spring work fine for me.

[Cheromaniac]

Stock spring pressure is ~85psi at the 1.640" installed height and ~200psi at 1.216" length (0.424" valve lift of stock cam) which is a pressure increase of ~270psi per inch. At 0.460" valve lift the spring pressure will be only 210psi.