Pistons

[Paul Precht]

Originally Posted by Mike Taylor 3601

people use to turn mopar piston around backwards in old days was supposed to make them faster, the diagram posted is for quieter operation,isn't offset the opposite for power?
I would guess the taller the compression height of the piston,the more difference this would make?
MikeTaylor 3601

Yes, I'm quite sure I used to put the offset on the side of the rotation. When I ran my shop I had dozens of 72-75 440 cast pistons laying around from customer builds as well as many 383 blocks so I would bore the 383s .070 and use the 72 440 pistons to put together budget street and bracket motors for the locals. The 72 440 has the same compression height as the 68-69 383/335 and the extra 30 grams or so could be removed from the pin. Got rid of a lot of junk laying around the shop and would make a nice high 11 low 12 second street motor for the low buck guys.

[Jeff Stout]

Looks like multiple ways to achieve this. Move bore towards center of motor ( as pictured), offset wrist pin hole in piston. How about re-bushing small end of rod to move rod over? Can anyone of these or all ways be used on a stocker motor.

[Dwight Southerland]

Originally Posted by Jeff Stout

How about re-bushing small end of rod to move rod over?

Think about what you said here. How is that going to change anything? It would not matter if the rod were 'S' shaped; the relative connection between the big end and small end would not change.