Very nice, JE I'm assuming? I wonder how much these actually help with friction. How much lighter are these than the previous pistons you were using?
Yes, JE pistons. Lighter, I can measure vs. one of our older pistons, but I'm willing to bet darn near the same.
Friction is definitely helped with a larger thrust side to help offset the piston being shoved into the cylinder wall face.
N54 is not asymmetrical from the factory-Why aren't they asymmetrical from the factory? Seems logical so I'm confused as to why BMW didn't do it.
S55 is
Are these JE pistons custom made for ABR? Just wondering.
Yes, custom made for us.
Actually, yes these pistons are custom made for us, for the N54.
All of our pistons from JE are custom to our specs. This is the next generation piston we're now using.