GMPP Pistons
GMPP Pistons Has any one used the GM performance parts LT1 pistons, I have been told by the GM rep I spoke to that they are just as strong as standard forged pistons.....???????
All hypereutectic pistons are "cast" pistons, meaning they are poured into a mold, then machined to specs. Forged pistons are forged under pressure, then machined to specs. The forging process makes them stronger. No matter what material they are using, the "cast" style pistons are not stronger. That being said, the high silicone content makes them stronger than a cheap hypereutectic piston, but still not stronger than forged. I do not know the price of the GMPP pistons, but I am sure you can spend just a little extra dough and go forged. The GMPP pistons are probably lighter than lower priced forged pistons (Speed-Pro), but they are not stonger. I still say he is just trying to sell you some pistons. Same applies to crankshafts, cast is poured, forged is pressure forged. Cast steel cranks are stronger than cast iron crankshafts, but still cast.
All hypereutectic pistons are "cast" pistons, meaning they are poured into a mold, then machined to specs. Forged pistons are forged under pressure, then machined to specs. The forging process makes them stronger. No matter what material they are using, the "cast" style pistons are not stronger. That being said, the high silicone content makes them stronger than a cheap hypereutectic piston, but still not stronger than forged. I do not know the price of the GMPP pistons, but I am sure you can spend just a little extra dough and go forged. The GMPP pistons are probably lighter than lower priced forged pistons (Speed-Pro), but they are not stonger. I still say he is just trying to sell you some pistons. Same applies to crankshafts, cast is poured, forged is pressure forged. Cast steel cranks are stronger than cast iron crankshafts, but still cast.
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