Originally Posted by crowerjunky
i have a solid roller 243/248 668 lift i would like for it to have more duration something around 250-/250 can it be cut down that much to get that much an how much lift will be lost
By reducing the base circle when they grind it, it is possible to grind a new profile that would have more lift. Whether it can be done on your core will depend on several things : current base circle diameter, what the current cam core part # is for heat treat depth to be determined9can't grind it too thin
), what the current lobe sepreration is(also ties into hardness depth, cores have a small range of seperations that can be ground on each core blank), and maybe a couple other criteria that I'm not thinking of right now.
You will pretty much have to discuss this with a cam regrinder, and possibly send it in for them to inspect to find out what is possible on your core.