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I have hypers in my 408 windsor stroker, chose them because of their low thermal expansion rates, allowing a smaller piston/bore clearance for less noise and to reduce piston rocking on this stroker.
Since the piston fpm limit of 4000 means I can't run above 6000rpm anyway, and since I have no intention of either blowing the engine or fitting Nitrous, they seem a good deal to me. Also I am on a street - gas compression ratio.
If you ever think you might blow your engine, or make it ready for NO2 in the future, or want a racegas CR, then the extra for forged pistons is worth it.
Of course, bragging rights might come into it as well!!
Lastly, I believe the hypers are lighter than the forged items - am I right??
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Wilf
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