Flat tappet break in?

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Flat tappet break in?

Postby Allend43 » Wed May 15, 2013 9:54 pm

Been awhile since I've run a hydraulic lifter camshaft. I'm building a budget 406 for a friend and open pressure is 235lbs. Is this too much to break in the cam? I plan on useing break in oil (Brad Penn) and some zinc additive just to be safe. I tried removing the inner damper, but press only came down 15lbs- not enough to make it worth it!
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Re: Flat tappet break in?

Postby Allend43 » Fri May 17, 2013 7:39 pm

Ok a flat tappets came about shortly after the dinosaurs died off. They were flat on the bottom and ran metal to metal against the camshaft without a little wheel on the bottom. I know it's hard to imagine. Anybody in here old enough to remember flat tappet cams? Lotta views and no help?
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Re: Flat tappet break in?

Postby Allend43 » Wed May 29, 2013 4:05 am

So many replies, I didn't know which one to go with! Broke it in just fine with 235lbs open pressure, no problems!
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Re: Flat tappet break in?

Postby Derek Stewart » Tue Dec 24, 2013 11:01 am

235lbs of open pressure is perfect for break in but I'd put some better springs in after break in something with 110lbs seat and 300lbs open jmho
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