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-   -   84 mm piston comparison (http://forums.pelicanparts.com/911-engine-rebuilding-forum/850844-84-mm-piston-comparison.html)

cmcfaul 02-09-2015 09:08 AM
84 mm piston comparison
 
Can anyone tell me the advantages of either piston crown design. The taller (pointier) one seems to me like it would put a lot of the charge pressure on the rings. Both are JE for a 2.4

Thanks


73 911 Ehttp://forums.pelicanparts.com/uploa...1423505171.jpg
http://forums.pelicanparts.com/uploa...1423505196.jpg
http://forums.pelicanparts.com/uploa...1423505205.jpg

cmcfaul 02-10-2015 11:08 AM
no engineers out there that can tell my why JE changed the design? Supposedly they have the same compression ratio.

Chris


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