[ponyakr]

Originally Posted by "QUICK-SILVER"

This member posted about running the olds pistons.

https://forums.maxperformanceinc.com...t=Olds+pistons

Clay

THANKS for posting that ! Looks like I ask some questions in that thread. Gonna go thru it again & see what info is revealed about the Olds pistons.

He mentioned that the pistons had a huge dish. He was right. Just lookin at the pic, the dish appears to be somewhere near 1/2" deep. WOW ! Think I may have made a positive ID on those pistons. They appear to be 1630 Silv-o-Lite pistons, with a .320 deep dish. Not positive.

https://www.summitracing.com/parts/u...ake/oldsmobile

And, the 400 engine had 4X heads on it. A 4X head 400 definitely does NOT need dish pistons. Small domes would probably run lots better than a deep dish. He switched to #16 heads, and bought pistons with a smaller dish.

https://forums.maxperformanceinc.com...4&postcount=19

At this point in the thread, he thought the pistons were forged.

https://forums.maxperformanceinc.com...7&postcount=32

This post said that the Olds pistons were used because the dish provided the right cc. Said they cost $340, which would be OK for forged pistons, but NOT cast. Said the stock rods needed to have the small end narrowed slightly, which was no problem. That brings up the question, exactly what width small end do the Olds pistons require ? Or, how much does a stock Pontiac rod small end need to be narrowed, to work with Olds 455 pistons ?

https://forums.maxperformanceinc.com...7&postcount=35

He thought the pistons might be the SP cast version. Couldn't remember.

https://forums.maxperformanceinc.com...7&postcount=36

The pistons were the cast version, & the cam was a 703 Voodoo, which has over .500 exhaust lift. So, there was no valve to piston clearance problem.

https://forums.maxperformanceinc.com...8&postcount=65

This post says it was "powerful" & chirped the tires when shifting. And that was BEFORE making LOTS of tuning changes.

https://forums.maxperformanceinc.com...5&postcount=63

Not much was said after the tuning changes were made. The thread just ends. Does anybody know how this engine has done & is doing now ?