FiveLiterRiceEater

stock is 1.6 right?

so if i got 1.7's, would that increase my valve lift? and by how much?

myshifter

yes, for instance if you had a cam lit of .480 with the 1.6 rocker, if you swap to a 1.7 it would increase to .510

knucklefux

the amount of inrease is a function of the lobe lift of the cam. if your cam has .333 lobe lift, you just multiply that by the rocker arm ratio to get valve lift. .333x1.6=.5328 and .333x1.7=.5661. if your cam has .398 lobe lift, .398x1.6=.6368 and .398x1.7=.6766. as you can see the greater the lobe lift, the greater the change in gross valve lift.

if you have an aftermarket cam with a higher lobe lift and you increase the rocker arm ratio, you should make sure that the valves aren't going to hit the pistons. most 5.0 have flycut pistons, so it's prolly not a problem...but better safe than sorry.

hope this helps.

FiveLiterRiceEater

i'd just like to say..



i love you guys. that helps greatly thanks!