Can You Say "HYPER-U-TEC-TIC"?

Funny this shod come up...just checked some new KB hypers for weight last week: maybe +/- 1 gram over the whole batch, if that much. And there was no hint of excess machining marks for lightening any of them; just 2 small holes in the pin bosses that hardly varied. So I would scratch the 18% weight variation from the negatives list for a good manufacturer. I have measured a lot more variation on good name brand forged pistons sets.

I have endurance raced both hypers and forged on a turbo'd 4 cylinder, 1.6-1.7 HP per c.i., 14-15 psi max boost. Both did fine. If I was pushing the boost harder, then I would certainly want forged. But I have also melted the top ring lands on a forged piston in a N/A race engine. So neither are bullet proof if you push them too hard.

t would be interesting the measure piston deformation versus temp for each side by side to see if there was a higher upper temp limit for one or the other before the piston shape went whacko.