You planning to drive a dyno?
It's a pretty well documented fact that hyper pistons are more sensitive to detonation, especially at high horsepower levels. They tend to fracture while forged pistons tend to just deform.
Pretty sure the tune on a 1000hp engine is pretty conservative and designed to not rattle the pistons regardless.
But go ahead, run cheap pistons in a cheap build and be sure to share the results.
Ok, I just might.
Harder also means more brittle in most cases.
Still doesn’t answer my question.
Are the speed pro performance pistons weaker than a stock LS Hyper?
If not, many somebody’s are throwing away money and increasing cylinder wear on their street cars.