Quote:
Originally posted by Dark_5.0
With a new cam you are supposed to let the car run a 2000 rpms for 20 minutes to beak in your new cam.
What about a used cam? My cam came out of a car that put about 10 1/4 mile passes on it.
Do I have to break it in or am I good to go.
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Good to go.
Technically you don't have to break in a roller cam at all...
Cam "break in" (used loosely when talking about roller cams) just ensures the lifters spin freely in their bores (flat tappet lifters) and also has a slight heat treating effect on the cam. Since our lifters don't spin (spider holds them straight), you don't have to worry about it.