Every book every artical, every instruction i have ever read for breaking in flat tappet lifters all say to get the rpms up to 2000rpm min as quickly as possible. My luniti instructions even say not to let it idle. Maybe rollers and diesels are different but for flat tappet engines I have always read and heard do not let them idle. Get em up to 2000rpm and get it the running temperature then start the increase of 500 rpms for one min all the way to 3500 then the same back down to 2000.
