Quote:
Originally Posted by NISFAN
If they apply more boost they might want to go forged pistons, not sure what N55 already has. I wouldn't be surprised if they stretch it to the traditional 3.2litre...no??
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The displacement of the new engine is a matter of debate. There is also some debate on what is forged in the N54 and N55. Best I can tell is that the N54 had a forged crank whereas the N55 has a cast one. However, the newer cast design was actually significantly lighter (3 kg). The resulting change was likely driven by a cost cutting exercise. Some claim the N54 also had forged Mahle pistons but others say not. I think the con rods in both are cast based on
these pictures.