While pricing a new cam - the DC engine book says I need these springs.

ir3333 said

hey guys...i sure don't profess to know this stuff beyond basics or what seems to be logical.
..just here to learn or help.As for the valve only briefly fully open that makes sense,but shouldn't the events leading up to fully open be decided by designing the appropriate ramps rather than too much lift to increase the opening at half lift?

Click to expand...

ir3333 said

hey guys...i sure don't profess to know this stuff beyond basics or what seems to be logical.
..just here to learn or help.As for the valve only briefly fully open that makes sense,but shouldn't the events leading up to fully open be decided by designing the appropriate ramps rather than too much lift to increase the opening at half lift?

Click to expand...

Being very general here... ramps can only be so fast in the flat tappet app...say lower at .050 you might be inclined to maximize lift or if its aggressive/faster not worry about it so much. Rollers arw where I do not go much beyond where a head, if the case, stalls..saturates..goes backwards or what have you, thats just my prefererence. There is more to it and other factors to consider, its not cut and dry unfortunately.