Quote:
Originally Posted by Shownomercy
Why would you want a set of hyperteutetic pistons? Every guy that rebuilds LTs stays far away from them. Can anyone explain?
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Every choice is a compromise. With pistons, you're balancing requirements between strength, cost, and noise among others.
Forged pistons win on strength. They lose on cost (more expensive) and noise (bigger clearances because they expand more as heated, they're likely to slap during cold starts)
Cast pistons win on cost and noise...they're cheap and can be run with tighter bore clearance than forged ones. Less prone to slapping during cold starts.
My experience has been that you run forged pistons only when you need the extra strength, for example forced induction or nitrous oxide injection.