Quote:
f you can get custom pistons made....why can't one get them made to be identical to the Packard piston, just .030 bigger?? i mean that is what a CAD machine is for. that way you can keep the skirts, pretty much it will be identical to getting a .030 piston from Packard. am i just being silly there??? i wonder if Ross can do that. i see the picture that was posted from Ross, but the piston they have doesn't have the skirts like the Packard on the left.
The Ross piston for Packard is machined from a basic forging for SBC. That's what most of the high performance aftermarket suppliers do. The pistons from Egge are hand cast one at a time and do not have the internal steel expansion control rings like the original Packard pistons.
As far as the size difference, forged aluminum is much stronger than cast aluminum, hence a thinner skirt on a forged piston is just as strong as a thicker skirt on a cast piston. The Ross pistons would be good to probably 1,000 HP, so I wouldn't worry about strength. However, being lighter, you would/should have the crank rebalanced.
Craig
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