Tims 88GT

hey guys what ratio are stock rockers?

Aixtreme89

1.6 to 1

Tims 88GT

also, what would my lift be with 1.7 ratio rockers with a .522 lift cam?

91hatchgt

It will give your car .030 more lift.. so from .522 to .552

Aixtreme89

Im pretty sure you wont be able to use a cam that big with stock pistons. But I may be wrong.

Magiarn71

How did you come to that?

Tims 88GT

i have the .522 now, you can go as big as the ford x cam which i think is like.546 but im not shure, so if i got magnum roller rockers in a 1.65 ratio, would i be ok still? also is their a web site that i can go to that will tell me how to do some of this math myself?

91hatchgt

I will explaine how they work. The only reason the ratio changes is becaust the pushrod pocket is located more towards the stud, or where it is mounted, this increases the ratio to 1.7 which gives an increase in both lift and duration. Lift increases are .030 so add that to his now .522, and you get .552

Tims 88GT

so if i had a 1.65 rocker that would make lift a .537?

91hatchgt

There is no such thing as a 16.5 Ratio Rocker that I know of.