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this is a discussion group and NOT a sunday school class.
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Forged pistons for my Hi-po engine, God has sent me a blessing" And they would never mention weight gain.
Modern forged racing pistons/pins of the same diameter are LIGHTER than the OEM Packard cast pistons/pins.
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crown of the Harvester piston is probably at least twice as thick as the OEM packard
Yes, but the compression height of the IH piston is already too low to be of use in a Packard, so taking anything off the top is not possible. I only used it a weight example because the bore diameter is the same.
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the Harvester piston could be cam ground
cam grinding is used to finish the outside skirt contour. It is NOT a weight removal operation or process.
FWIW, there's NO way to use a diesel piston, but here's a way to make a Ford big truck gas engine piston fit the Packard:
1. Custom mill the top and inside of the piston to fit.
2. Rod small ends have to be machined for pressed pins.
3. The Ford truck pistons are a lot heavier than the Packard, so the rods have to be extensively machined to lighten them and the engine has to be re-balanced.
4. Now that I have done with the learning curve, there is some cost advantage over custom forged pistons, plus the cast pistons can be fitted with .0025" bore clearance, where forged pistons need at least .005". Thus, the cast pistons will be quieter, use less oil and have less blowby and should last longer in normal operation.
I have one 352" engine bored .070" over for 364" about ready to go in my Studebaker truck and have Ford pistons and rings on the shelf to do two more engines.
thnx, jack vines
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