Thread: Engine Break-In Oil/Procedures

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Originally Posted by erik erikson

There are a lot of varibiles but I.M.O. 6,500 rpm's about max. rpm.
After 6,500 I would go mech. roller.
There have been some Ford guys with beehive springs, hollow stem valves etc. hitting 7,000 rpms but it would make me nervous.

I've never trusted those beehive springs....spring seat cutters just aren't that expensive!!!! I've heard the light valves/hydraulic roller argument too, Erik.... Just can't quite buy into it. Guess I'd rather have an engine I know the valve train is going to get a big hiccup if I occasionally buzz it a bit past 6500.... I never thought popping the covers and running the valves was that big of a deal...heck, what else would you do on Sunday mornings????? '

IMO the mechanical rollers still offer so much more in cam selection, increased ramp speeds, and under the curve power.... The idea of spending all that money and having a cam that is "almost right" just doesn't work for me..... But then most of my cam education came back a decade or two ago......

im very new to engine building/installing and have a question im buying a 350 4 bolt main from oreillys and i wanted to know am i going to have to do break in on it?