cam break in...

[fastford]

I used to break my cams in with delo 400 diesel oil, which you cant get any more, and 75# seat pressure springs, now my cam makers do it for me on there machine for about 50 bucks.

[DaveBauerSS6]

This is the best well written advice on camshaft preparation. I practice the break in rockers only.

http://www.camcraftcams.com/index.php?page=cam-lifter-wear

[racer1355inpa]

IMO, if your gonna "break in" the cam, using one or the other is sufficient. Either remove inner springs or use low ratio rockers. Both not needed and would be overkill. I used break in rocker arms for many years. I agree with an earlier poster though about quality parts needed from the start or its all for nothing anyway.