WebOct 27, 2010 · Forged pistons will have a looser fit in the bore until they warm up because the forged piston expands more than cast, so it has to be fit looser at room temp to allow for this expansion. May also have more blow-by and slightly more oil consumption when cold for the same reason. T turchiac Registered Joined Jan 19, 2010 222 Posts WebNov 10, 2004 · A cast piece is sort of a random scattering of molecules as they slow from molten. Where as a forged piece would have had the molecules compacted into shape and "fit" together making the structure stronger. I have no idea if forged pistons are lighter it would make sense for them to be heavier, but not noticeably.
What is the difference between a forged piston and a cast piston ...
WebWiseco forged pistons are built with greater precision and to finer tolerances to withstand more abuse, and deliver an extra performance edge that can make the difference between finishing first or second in a race. For example, the OEM Honda CRF450 piston’s compression ratio is 12.5:1, which is fine for general riding applications. http://www.strokerkits.com/cast-hypereutectic-or-forged-pistons/ community link officer
GLM Products Inc - Pistons: Cast vs. Forged
WebMar 18, 2013 · The choice between using a Cast, Hypereutectic or Forged piston is dictated by the application. Forged pistons may not be absolutely necessary in all … WebForged pistons, on the other hand, are formed by taking heated aluminum ingot and forcing it into a die. The forging process ensures that the aluminum is uniform, which means the final pistons is stronger than a cast piston of similar thickness. WebJan 7, 2011 · Posted January 7, 2011. Forged piston certainly have their place like in a four stroke where they are definitely better than a casting. However, for two strokes it appears that all the oem engineers have settled on castings. All of the OEM manufacturers use castings for stock four stroke pistons as well. community link logo