first start break in

hi, on a cam break in, use water only!!! no antifreeze!! reason is, water leak might happen, turns oil white, no damage. antifreeze will hurt the babbit in bearings. like pouring acid on metal. it eats the babbit. a restrictor ring is best for cam run in. a cam does not need to be run 20 to 30 minutes. 10 minutes is more than enough. cams go flat in first 2 minutes , not last 2 minutes. I've always ran my cams in 10 minutes or less.