pistons
A piston grinder... That would be a cool hunk of equipment to have. Hardly anybody makes their own pistons anymore and for good reason; you can get just about any piston for just about anything for anything, sorta...Except the str8 Buick. It's either bone stock or forged, neither of which I particulary like. Finding the original spec's for the str8 piston is mostly impossible and even the original pistons seem to have way too much cam in them, like .010. Perhaps Buick in switching to the aluminum piston from iron was being very conservative and did not understand what the alloy would do over the long haul. I do know the alloy has a t3 heat treat and is age hardening, possably they thought it average out and take a set, it did, too much. And, every piston manufacturer just copied Buick thereafter. The str8, any of 'em, actually has a small piston, they are actually in motorcycle piston territory now, which opens up a whole new world of possibility now, and motorcycle pistons don't have that much cam in them. So, the majority of pistons that everybody makes for v8's, (forget jap or euro stuff for now) is 4" or bigger. Can a 4-5" piston take .010 cam? Sure. There is only 1 str8 piston maker that I know of: EGGE. Really nice piston, 15-16% silica alloy, otherwise, bone stock and too much cam. And a hypereutect piston expands like a iron piston. So, whats the right fit for a forged unit, don't know. Several different pistons with different cam, run 'em test for fit. Only way I can think of. I got EGGE to make me a bunch of blanks, making my own for just this reason. Alleycat