[steve25]

A factory cast piston will run a tad longer than a hyper when tuning factors go off the rails since they are not as brittle.

This does not mean I would not use them in a build, but I would not use them in a short block that would be approaching or topping 400 Hp unless my wide open throttle tuning skills where very good.

To me Hyper’s are not a material to hone your tuning skills on, especially so with todays pump fuels.

I would sooner run a common 5/64” ring Speed pro piston and stuff far lighter wrist pins in them.

Also I need to mention because I forgot that total seal makes a shim to go from 5/64” rings to 1.2nm.
This changes things in a big way, and they claim a 12 Hp gain.
Taken with a grain of salt let’s say a solid 8 Hp gain.

It’s a bit of a learning curve to heat a rod for pressed pins.
I learned on 5 junk rods before I got the hang of it, but I gotta say that if a shop leaves this task to the lowly shop Gofer then the odd’s of taking the needed temper out of steel rods goes way up!

The best way to do that job right every time is with a Thermal gun.