25% reduction in mass.....
Hi Mike
A 25 % reduction in the reciprocating mass is significant particualrly at higher RPM.... but doubt you would notice a difference in your 216.
In racing circles anything you can do to reduce the weight of a metal mass that has to reverse direction of travel is important. Theoretically it should allow the engine to gain its RPM faster, rev faster while not iducing as much strian on the rods, bearings, crank, etc. and easier to pickup revs in gear down situation. Reduction in weight should make for a smoother engine and longer life. The special alloy piston may be more stable at various temperature..... expansion/shrink rate from cold to hot maybe better controlled....potentially quieter on a cold start. Piston skirts may cause less oval wear on bottom of cylinders.
But in a CMP at 40 mph 2800rpm... you should not feel much difference.
If I was rebuilding a 216 I would take advantage of the latest technology and buy the modern alloy version rather than hunt for NOS old stock.
My 0.05 worth........... Phil what are you using....?
Bob
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Bob Carriere....B.T.B
C15a Cab 11
Hammond, Ontario
Canada
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