[joec500]

Originally Posted by GeorgiaTech335coupe

They have been confirmed to by cast pistons. They are hypereutectic which is a higher quality cast.

I have confirmed this in my engine (October 2007 build), it has been confirmed in another engine by a shop in Houston on an 08 build.

Everyone has cast pistons.

2nd... I believe Shiv and FFTEC have taken apart a 06 build N54 to confirm this. I saw a thread on this awhile ago.

[OneTimeI]

So what is forged?
2010 335xi .... N54B30

[jippii ensio]

All N54 pistons are hypereutectic.

[kiteboy]

What signification of hypereutectic??? Not forged??

[135Pats]

Originally Posted by OneTimeI

So what is forged?
2010 335xi .... N54B30

Every single N54 ever made - for any BMW ever made, has a forged crank, forged rods, and cast pistons. It does not matter what car you drive, if it came from BMW with an N54 that's the deal.

Originally Posted by kiteboy

What signification of hypereutectic??? Not forged??

http://en.wikipedia.org/wiki/Hypereutectic_piston

It's a casting technique. Produces results that exceed traditional casting in terms of consistency of the piece, and material strength.

Look it up on wikipedia great explanation, hypereutectic pistons also have less expansion so engineers can specify tighter cold tolerances.

Originally Posted by 135Pats

Every single N54 ever made - for any BMW ever made, has a forged crank, forged rods, and cast pistons. It does not matter what car you drive, if it came from BMW with an N54 that's the deal.


http://en.wikipedia.org/wiki/Hypereutectic_piston

It's a casting technique. Produces results that exceed traditional casting in terms of consistency of the piece, and material strength.

lol we posted at the same time.