14 Ultimate N55 Engine Mods & Upgrades: BMW Tuning: 400hp, 500hp & Getting Over 800hp

We look at 14 of the best mods and upgrades for your N55 engine and we talk about tuning them to 400, 500 and over 800hp. This video will show you where to start and which mods are the most cost effective on your N55 engine whether it is in an E90, E91, E92, E93 335i E82 E88 135i 335i E70 or E71. It was the first straight six to use a twin scroll turbo charger and was extremely fluid with a DOHC VVT and VVL. It produced reasonable power from 1250rpm and crested at around 4500rpm, providing a near perfect torque band before reaching the speed cutoff at 7000rpm. Because BMW intended the engine to function reliably and retain the feel of a much larger v8, throttle lag was practically non-existent (for a turbo engine). The N55 prefers higher octane gasoline because it provides more power and better efficiency, with most users saying that the expense per mile is the same as when using low octane fuel. The N54 and N55 engines were identical in many ways, but the most notable change was that the later N55 model had a contemporary single twinscroll turbine, as opposed to the N54's twin-turbocharger. A single turbo is less expensive, lighter, and has a few advantages, but the twin-turbo configuration provides more possible power increases from upgrades. However, the benefits of a bigger single twin scroll turbo are still substantial and sufficient for most tuning tasks. Surprisingly, Alpina chose a twin turbo system in their performance versions. Generally, the N55 improved on the N54 and was in production from 2009 to 2015, when it was superseded by the B57 engine. With the introduction of the Alpina tuned models we saw the N55 factory power varies from a respectable 302 bhp to 425 bhp and with mapping adjustments it is possible to add around 80hp on the basic engine. Air Induction kits and Exhaust will NOT usually ADD TORQUE for most stock N55 configurations on their own, but they will allow you to increase power after other improvements by removing the limitation you hit with other mods as the factory setup runs out of capacity to cope. Flowing and porting the Head - Flowing and porting the head will get air streaming into the engine while eliminating turbulence or limitations. Turbo upgrades - forced induction is the most important method to increase the air flow to your intake, enabling you to consume more gasoline and gain power. N55 remapping offers the most power for the money, but new ECUs and integrated Tuning boxes are also options. Chapters 0:00 Intro 2:34 Spark Plug Selection 3:00 Intercoolers 4:07 Turbo Upgrades 6:00 Fuel - Port Injection Fuel Types 6:17 Engine Tuning (Remapping) 8:08 Induction Kits & Intakes 9:05 Head Work Gas Flowing Valves 10:15 Stronger Engine Parts 11:11 Injector Upgrades 12:02 Exhaust Mods 14:20 Forged Crank Pistons    • 14 Ultimate N55 Engine Mods & Upgrade...   Intercoolers The following cars came with the N55 engine: 2009–2017 F10/F11/F07 535i, 2010–2013 E90/E91/E92/E93 335i, 2010–2013 E82/E88 135i, 2010–2017 F25 X3 xDrive35i, 2011–2013 E70 X5 xDrive35i, 2011–2015 F30/F31 335i, 2011–2014 E71 X6 xDrive35i, 2012–2015 E84 X1 xDrive35i, 2013–2016 F32/F33/F36 435i, 2014–2018 F15 X5 xDrive35i, 2014–2019 F16 X6 xDrive35i, and 2014–2016 F26 X4 xDrive35i. It has different variations, including N55B30, N55B30O0, N55HP, and N55B30T0. The N55 engine also has applications in various models such as the 2011–2018 F06/F12/F13 640i, 2012–2013 E82/E88 135is, 2012–2015 F20/F21 M135i, and 2012–2015 F01/F02 740i/Li. Additionally, Alpina has developed its own versions based on the N55 engine, including the 301 kW version used in the Alpina F30 B3 Bi-Turbo and Alpina F33/F34 B4 Bi-Turbo, the 324 kW version in the Alpina F30/F31 B3 S Bi-Turbo and Alpina F32/F33 B4 S Bi-Turbo, and the 332 kW version in the Alpina F32/F33 B4 S Bi-Turbo Edition 99. More information can be found at https://www.torquecars.com/bmw/n55b30... Guide to porting and valve jobs    • What Is Head Porting? How to Port Per...   https://www.torquecars.com Legal Notice: Unless we have inspected your car we can only provide generic theory. All information is provided without warranty, please check any recommendations made with a mechanic locally to verify it would be legal in your area or region and that it would be suitable for your car and your needs.