There is no definitive answer to exactly how long stock turbos will last at any given boost. Thats it! Map 5: Autotuning map, absolute target of 11-17psi based on octane and conditions. Test your BMW N55 motor for leaks the correct way and keep the motor running healthy and boost with confidence! The BMW N55 is a turbocharged straight-six petrol engine that began production in 2009. The BMW N55 is a turbocharged straight-six petrol engine that began production in 2009. ... BMW F30 335i N55 3.0L Performance - DocRace Single Turbo Kits. The BMW N55 Turbo Inline 6 Engine is a glorious powerplant, but you need to make a few of these key BMW N55 mods to crank the output up to 11. Upgraded internals in a stock turbocharger for more boost & more power! Pressurizing the system will allow you to run peak boost your motor was tuned for and ensure you are putting all the power down without any leaks. ... Stock version of BMW 135i N55 covers ¼ mile in 13.3-13.5 seconds. I recorded a peak boost of 9psi (oof). Connects intercooler to turbo.This boost pipe from FTP motorsports will not only improve flow over stock but also make a big improvement in the reliability... FTP Motorsport Boost Pipe - F10/12/13 N55 Turbo Boost Leak Testers, Inc is dedicated to specializing in boost leak testers. Boost pressure is 0.65 bars/9.5 PSI. Map 4: Stock performance with JB4 active for logging only. The N54 in 335i boost around 7psi The N54 in 335is, probably around 8.5psi (guess). For vehicles with an electronic wastegate. xDrive vehicles will require additional hardware kit ES#3149039. So, who has pushed the boost up? While this may not seem like drastic improvements, the already snappy throttle response characteristic of the N55 is noticeably more responsive and the additional WHP can be felt as the engine reaches peak boost. I also set 'Torque request ceiling (Auto)' to 510 across the board, as well as 'Modelled torque limit 1, 2' to 510 across the board. Next stage of power increase is connected with replacement of turbochargers and purchasing of Methanol Injection Kit. I started off by taking a log of the stock tune to use as my base. ... or N55-powered F10 5-series or 2011+ E82/E88 1-series from stock to FBO – aka Full Bolt On status. Boost Tap For N20/N54/N55 Bmw. Then I set 'Limitation by automatic gearbox' to 3 which is meant to disable TCU torque limits in the DME. If your BMW N55 is modified, tuned, FBO, etc., the 1-step colder spark plugs are the best option. The N55 was BMW's first straight-six engine to use a twin-scroll turbocharger.It also won three straight Ward's 10 Best Engines awards in 2011-2013.. Brand: ES#: 3411510. Itâ s not an uncommon failure even at stock boost levels. I wana know if someone pumped up the stock boost to really test the mettle of the N55s holding strength yet. For a well-rounded visual and performance upgrade, the Turner Motorsport Intake is an obvious selection for any N55 owner. The difference is obvious. Note that costs will be higher for obtaining 450 HP engine. The N55 is only limited by it's turbo size and fueling when it comes to making power. These spark plugs are not recommended for stock boost as the spark plug will not retain enough heat to burn carbon deposits, thereby significantly reducing the life and effectiveness of the plugs. The M2 runs much higher boost from the factory than a normal N55 motor and thus often requires special settings. The N55 replaced the BMW N54 engine and was introduced in the F07 5 Series Gran Turismo.. Max safe boost for Stock N55.