cast vs forged pistons, was rebuilding a 392

[dardal@xxxxxxxxxxxxxxx]

Forged pistons have higher thermal expansion as I recall, so the cold clearance 
must be larger.  This will impose a larger load on the rings when the engine is 
hot.  That is probably of no concern for a race car, but for a daily driven car 
it might be.  Forged pistons are stronger, but this is needed only if very high 
rpm is to be obtained.  I do not think you need them for a street engine.

D^2


> I have seen on P.A.W cast and forged pistons
> ok maby stupid to ask but what is the deverence in quality
> also i find sometimes used pistons on ebay is that worth a try
> while rebuilding  I want to try to get some more power
> and probably go for hardend valve seats