I have allways run a forged piston in everthing we ever built on the street. No noise with .005 to .006. No oil cosumption.I sure would never build one for the street if i was going to put a blower turbo or gigle juice to it with out forged pistons.Now some of these motors are run 10 years and over 100000 miles no problems. Every engine builder has a diff way. I know what you mean with a race forged piston but thats a total diff animal.Some of our long rod motors have such a small wist pin and thin piston they would not last on the street.Have you gotten a 6 3/8 rod in a 355 yet? Not many have. Our IMCA motor with a 2 ring coated forged piston only runs a .003 cyl wall clearance. Before we used coatings we up around .008 in the IMCA car but thats all old tech now.Have you seen the 28 lb crank yet LOL. Just a bit more cash but its so pretty you wont want to put it in a motor.
Oh well cant talk to much about the IMCA motor as its 19 grand with a claim of 1500 bucks so we will keep that stuff secret.Never know who reads this stuff LOL
My twist on forged,ask your motor man and piston guy.It changes weekly. Only forged for me. Cast and hype are for ash trays. LOL