Wondering if anyone knows the weight of a stock 292 piston?  I am wondering how crucial it is to dynamic balance a rotating assembly?  I have 0.040 over Egge pistons for mild build but no stock pistons to compare to.  If I balance all the weights of the pieces (rod and piston assemblies) will that be decent.  How much is included when they balance an assembly ie. damper, flywheel, pressure plate?  Or are these done seperate?  Almost ready to start assembling bottom end to measure deck as pieces have come together.

The factory piston with pin weight for the Y-Block pistons is expected to be in the 675-710 gram neighborhood.  As a general rule, pistons on the light side of this will not necessarily require any extensive crankshaft rebalancing while pistons that are on the heavy side of this makes rebalancing the crankshaft much more preferred.  With all that being said, it is still desirable to have the complete rotating assembly balanced.  If not balancing the crankshaft, it will still be to your advantage to match balance the pistons with pins as well as the small and big end wights of the connecting rods.

 

Here are some past discussions regarding balancing just the pistons and/or rods versus the whole rotating assembly.

http://forums.y-blocksforever.com/Topic2688.aspx 
http://forums.y-blocksforever.com/Topic20542.aspx 
http://forums.y-blocksforever.com/Topic35212.aspx 

 

Performing a search on this site will bring up some more discussions on this topic.

Lorena, Texas (South of Waco)