Official 2011 E92/E93 facelift & Information
335i 
Jan 17, 2010 | 12:34 AM
#18
TS BMW Forums
Joined: Sep 2008
Posts: 3,144
From: Rochester Hills, MI
In 2011 the 135i, 335i, 535i, 535 GT, and 740i/Li will get BMW's new N55 powerplant (twin-scroll single turbo made by BorgWarner). Racing Dynamics has already created a tuning option good for about a 100hp and 80 lb-ft bump! No one is really sure why BMW has gone this route. Several rumors though; cost, efficiency, HPFP issue in the N54.
The N55 powerplant uses the the innovation of twin-scroll technology and the integration of VALVETRONIC throttle-less intake technology.
This new engine promises even better throttle response and even more fuel efficiency. Thanks to VALVETRONIC, VANOS, and the twin-scroll turbocharger housing, peak torque is reached 100rpm earlier than with the previous engine, and engine boost response is improved across the entire engine speed range.
Twin-Scroll Turbo System Design Explained
The N55 powerplant uses the the innovation of twin-scroll technology and the integration of VALVETRONIC throttle-less intake technology.
This new engine promises even better throttle response and even more fuel efficiency. Thanks to VALVETRONIC, VANOS, and the twin-scroll turbocharger housing, peak torque is reached 100rpm earlier than with the previous engine, and engine boost response is improved across the entire engine speed range.
Twin-Scroll Turbo System Design Explained
