[Cripple]

Originally Posted by BimmerEngineer

Totally. This N55 engine is still the same one from the 2011-2014 135.... N55 is only safe to about 375 RWHP. Things will start breaking after that. Honestly, if you want to modd, buy a real M car or BMW 550/650... These cars engines can handle an extra 100-140 RWHP.

Giant troll is giant.

[Newguy123]

Originally Posted by BimmerEngineer

Totally. This N55 engine is still the same one from the 2011-2014 135.... N55 is only safe to about 375 RWHP. Things will start breaking after that. Honestly, if you want to modd, buy a real M car or BMW 550/650... These cars engines can handle an extra 100-140 RWHP.

thats funny there are quite a few N55s now making over 460whp on stage 2 hybrid turbos....they arent having any issues with things breaking. maybe you should try pulling your head out of your azz and drive your 550 into a wall.

[BLK235iNJ]

Bimmer can you provide technical detail to support what you are saying?

Facts may be welcomed better than just a vague opinion. I've tried posting threads to find out the limits of the block internals, cooling and fuel system but no one seems to have details. Just opinions.

Originally Posted by BimmerEngineer

Totally. This N55 engine is still the same one from the 2011-2014 135.... N55 is only safe to about 375 RWHP. Things will start breaking after that. Honestly, if you want to modd, buy a real M car or BMW 550/650... These cars engines can handle an extra 100-140 RWHP.

[J-Sud]

Originally Posted by BimmerEngineer

Totally. This N55 engine is still the same one from the 2011-2014 135.... N55 is only safe to about 375 RWHP. Things will start breaking after that. Honestly, if you want to modd, buy a real M car or BMW 550/650... These cars engines can handle an extra 100-140 RWHP.

From what I remember the crank shaft is forged in the M235i, i cant recall where i read this. However, the part number is different for the M235 vs 435