Here is a DIY install guide for installing N55 mid pipes on a N54 powered model and deleting the secondary cats.
The main benefit of deleting the N54′s secondary cats is more flow, better faster spool up of the turbos, and a louder more deeper tone of the exhaust note.
BMW TwinPowerTurbo technology again takes two of Ward’s 2013 10 Best Engines Awards. The 2.0-liter TwinPower Turbo 4-cylinder (N20) and 3.0-liter TwinPower Turbo inline-6 (N55) are both repeat winners.
“Nearly every BMW now sold in the US features TwinPower Turbo technology,” said Ludwig Willisch – President and CEO of BMW of North America, LLC. “In such a competitive market, to take two spots highlights the benefits of the BMW EfficientDynamics philosophy. It also shows that while we look for improvements in efficiency, we are still committed to fulfilling the promise of The Ultimate Driving Machine.”
Currently five models feature the 2.0-liter TwinPower Turbo 4-cylinder – Z4 sDrive28i, 528i Sedan, 328i Sedan, X3 xDrive28i and more recently, the X1 sDrive28i/xDrive28i. They will be joined next spring by the … CONTINUED
Hartge releases its software ECU piggyback tune for the BMW 6-cylinder turbo N55 engine. It yields impressive power gains of +56 horsepowers and +59 ft-lb torque! The tune can be applied to the F30 335i, F10 535i and F25 X3 xDrive35i.
The Hartge ‘Engine Conversion’ is a bespoke tuning module that plugs in ahead of the engine computer on the wiring harness. It has factory-style plugs to connect in-line with the water temp sensor, fuel rail pressure, turbo boost pressure sensors, turbo wastegate valve, intake camshaft sensor, 12V power and ground. The module then sends a modified signal to the engine computer allowing it to increase boost by varying amounts depending on load, engine speed, and other factors.
All of the factory safeguards remain … CONTINUED
We previously reported that BMW has plans to expand its TwinPower Turbo technology to its entire future 4-cylinder engine range. Word now comes from BMW AG that the future 3-cylinder engine range (gasoline and diesel) will also receive the TwinPower Turbo treatment.
The TwinPower Turbo package combines a single twin-scroll turbocharger, direct injection and full variable valvetronic. It first debuted on the N55 motor in the 5-series GT in 2009 and most recently on the first 4-cylinder motor, with the 2.0L N20 gasoline engine (full N20 details) in the X1 xDrive28i. The use of this technology allows for increased horsepower while decreasing CO2 emissions. As an example, the N20 outputs 245hp compared to just 156hp from the naturally aspirated version.
No timing yet on when the first TwinPower … CONTINUED
Matt@Camber-Toe performs a tear down of the N55 motor, BMW’s relatively new single turbo twin scroll N55 engine that now occupies the top spot within BMW’s inline-6-cylinder lineup. An analysis of the potential upper power limits of the turbos will be performed and overall upgradability of the N55.
Here are the first clips we’ve seen of the BMW Performance Exhaust matched to a N55 motor and it sounds terrific! N55 BMWs come from the factory with a throatier exhaust than the N54 due to the absence of two mid cats. Paired with a Performance Exhaust, the N55′s growl is amplified beautifully.
For 2011 BMW has made some substantial changes to the E92 and E92 BMW 3-Series Coupe and Convertible.
The first and foremost and probably biggest change is the introduction of the much debated N55 engine to the 335i3.0l
Single Turbo "TwinPower" Dual Scroll
300HP and 300LB-FT Tq.
Improved torque band and overall engine responsiveness
Introduction of VALVETRONIC
All aluminum construction
StylingRedesigned headlights (new shape and "graphics").
Brighter LED "corona" rings (angel eyes)
Bi-Xenon now standard
Adaptive Headlight and the Adaptive Headlight Range Control are optional
New tailight "graphics" (overall shape is unchanged) now with LED
New sideview mirror design
New front and rear bumper design which actually increase the overhangs to make the car look slightly longer
Wider kidney grill with … CONTINUED
The N55 is the second turbo engine out of BMWs new push towards EfficientDynamics and increased use of turbos as a replacement for displacement. The unit has been has been reviewed and people are generally happy with it, but whats interesting is that now it seems official: BMW will use the N55 as its main workforce with only a few notable exceptions