I thought the counterweights were designed with the weight of the stock rods and pistons in mind. Does lightening one and not the other unbalance things and induce vibration?wes said:Totally noticable in acceleration and decelration, also less stress on internal reciprocating components.
This is precisely why this needs to be done by a shop that can lighten and balance the crankshaft. It is also best to use rods that have been balanced end to end within 1 gram. Just makes the assembly that much better/more reliable!94econobox said:I thought the counterweights were designed with the weight of the stock rods and pistons in mind. Does lightening one and not the other unbalance things and induce vibration?
This is not something most people do on a street car. Not that it can't be done but it is expensive and is not a bang for the buck mod. It will affect drivability to a certain degree just like a lightweight flywheel does. So tooling around town will likely not be as comfortable as it as with the stock motor. But in the world of high performance it is worthile. And revving to 6300 RPM's is a non issue on our cars, assuming you meant 7300 then yes!94econobox said:So with a lightened and balanced crank and lightweight/balanced pistons and rods should allow for reliable revving to 6300 rpm time after time, eh? Is there a limit to this, i.e. if this were combined with a lightweight flywheel, would the reciprocating mass be so low, it'd be hard to drive around town (engine slowing quickly between shifts)?