how strong is the C55 M113NA block?

If that's not an option, I'm sure splinter or boohooramblers can chime in with the information you require - documented, footnoted, and with the appropriate bibliographical sources referenced
Since having forged internals for most people is a huge deal, most manufacturers actually used the word forged in there marketing statements when they use forged internals.
Rods are usually the first to go when turboing NA cars. You'll need forged rods if there not forged already.
The standard Mercedes-Benz M113s are built in Untertürkheim, Germany, while the AMG E55 versions are assembled at AMG's Affalterbach, Germany plant. All M113s have aluminum engine blocks and aluminum SOHC cylinder heads. The cylinders are lined with silicon/aluminum, and the heads have 3 valves per cylinder. Other features include SFI fuel injection, fracture-split forged steel connecting rods, a one-piece cast camshaft, and a magnesium intake manifold.
Doesn't mention forged pistons but the forged rods are great news...should allow to go little higher on boost. But i would get confirmation from the pros before you risk your $20k engine.







