BMW’s N55 engine is capable of excellent performance straight out of the factory. A Little More About the N55 Engine. Let’s start from the beginning and talk a little about where the turbo came from. Standard OEM size is 35.57mm and 46.00mm. N55 Upgrade Turbolader HM460. If so, what are the turbo options? Stage 1-2. In my 1990 Mits turbo, the stock turbo size was the same as a 16G, but inside the path was noticeably smaller. Fuel becomes an issue when you get north of 20 psi and we were plagued with check engine lights under racing conditions. Increasing boost pressure, or “tuning” increases horsepower and torque in either engine. Alfred Buchi wasn’t the first engineer to realize that forcing air into an engine would increase its power but he was the first patent holder for a compressor driven by exhaust gasses. Kit Type: Stage 3.1, Stage 3.2, Stage 3.3, Stage 3.4. My dad's 496 stroked big block only uses 93 octane. On the other hand, the twin-turbo setup on the N54 will climb to as much as 20 PSI (depending on supporting mods) and does not fall off as dramatically as the N55. Twenty years earlier Gottlieb Daimler patented the modern supercharger by designing an air pump (compressor) driven by a gear. First thing to do when you open your box is to make sure all parts are in their respective bags and nothing has been left out or lost during shipping. For starters the BMW N54 is a true twin-Turbo. However, for reliability and longevity reasons, we recommend limiting boost to about 20-21psi. The 7670 is the largest EFR that will fit. Flow capacity: 70 lbs/min (est.) Good Morning to me ! The second exhaust runner is focused on the larger, outermost part of the turbine. During a few 1/2 mile roll races our Stage 2 X1 35i would go into limp mode. It has two separate turbos, each powered by 3 of the engines six cylinders. How does it compare to turbochargers already known (i.e. There is a … 2015 BMW M235i with Enzo Performance GTX3586 turbo kit 24psi test drive - dynoed 632/525 at 25psi The EFR turbo options for E-chassis cars are: 7064 (550whp) and 7670 (650whp). Their Stage 1 upgrade uses the stock turbo housing which is a Borg Warner B03 Twin Scroll. View Cart. Dimensions. We recommend our N55 High Flow Inlet Pipe with the Stage 2. OEM reliability. At the end of the day, the BMW N55 TwinPower turbo engine may not be as robust as the N54 in the mind of a tuner but it’s one helluva motor. That's quite a bit bigger compared to the fist sized twin turbo's. If you additionally buy cold air intake (for example, Burger Motorsports) along with performance exhaust system, you will get 380 HP. Physical size doesn't mean much. -Yes, you will need additional fueling to reach the power potential of this turbo. BigBoost Stage 4 B58 GEN1 Turbo Upgrade $ 5,000.00 $ 3,750.00. OEM driveability for your BMW N55 engine. Appears unmodified stock from the outside. N55 - Turbo Accessories. NASP engines need quite a lot of work when you add a turbo, so we have a separate guide to help you take into account the pros and cons of going this route on your N55 The downside of the N55 is that boost pressures will climb to a peak of 16-18 PSI then drop off as engine speeds climb above 4,500 RPM’s. Wastegate type: EWG, PWG. Here is a breakdown of what you should have. https://www.pinterest.com/diyautogalaxy/, We’ve also started posting some videos on Youtube and here’s one of DIY Detailing vids https://youtu.be/xNJ7iIidJM8, BMW X1 35i Sleeper Project – Not so Sleepy Anymore but Awesome, Tuning The JB4 With Meth BMW E84 X1 35i FBO Pure Turbos S1, BMW X1 35i E84 Project Sleeper – This is Going to be Fun :), The BMW E84 X1 35i and Why You Should Buy One, Lamborghini Huracan Finest Signature Detail by RV Car Care, BMW X3M Competition 0-60 and 2,000 Mile Review – 1 Awesome SUV, BMW N55 TwinPower Turbo Explained and It’s Awesome. The fifth generation of the BMW 7 Series consists of the BMW F01 (sedan version) and BMW F02 (long-wheelbase sedan version) full-size luxury sedans.The F01/F02 generation was produced from 2008 to 2015 and is often collectively referred to as the F01. Pure Turbos machines the housing to accept a larger compressor wheel and they modify the turbine wheel to improve flow. The result; faster spooling times like a smaller turbo without sacrificing top-end power. You need a compressor flow map to reach any accurate conclusions on power potential, efficiency and flow . Designed to give you the ability to go big single, Vargas Turbo has done it again. It does use a custom version of the smallest Borg Warner EFR Billet Compressor wheel (62mm). Additional information. Thanks. The Borg Warner B03 Twin Scroll turbo is tune-able in stock form and incredibly reliable. Yes, our kit will fit an E-chassis N55. 1 D313-0115 Dinan Turbocharger; N55 Vac 1 D313-0116 N55 Turbo Hardware Kit _____ INS310-011x Page 2 of 18 Rev. Does anyone know the size of the turbo in the N55? One thing that I found interesting from the article that RPM90 posted was; '09 BSM 128i DD '98 E36 M3 - BMWCR IS #718(sold). More oxygen means you can also add more fuel and that results in more power. Both engines have the same displacement of 2,979 cc (181.8 cu in) and a 10.2:1 compression ratio but the turbo setups make the difference. Numerous turbo upgrades are available for the BMW N55 engine but Pure Turbos is the way to go. Select options / Details. N54= "Twin Turbo" = 2 turbos of the same size with single-scroll tech, feeded by 3 cyliners each N55= "TwinPower Turbo" = 1 turbo with twin-scroll tech. 70 lbs. In stock use, BMW programmed both engines to run at a max boost of between 8-9 PSI. We later found that the car was producing more torque than the DME would allow and we kept getting a transmission fault code. The compressor wheel inside the turbocharger is increased in size allowing 30% greater flow thus enabling additional boost pressures at higher engine speeds while retaining efficiency. BigBoost offers 4 separate stages within their stage 3 turbo kit, these stages all refer to the size of the turbo: 3.1: 5459 turbo – capable of 470whp (per BigBoost) Compressed air is more dense and therefore contains more oxygen per square inch (PSI.) The BMW N55 is a turbocharged straight-six petrol engine that began production in 2009. Here is a link to a picture of the turbo in the N55. The N55 replaced the BMW N54 engine and was introduced in the F07 5 Series Gran Turismo.. I think to get more whp, you'll need to increase the engine size. N55 Stage 3 Turbo Upgrade Options 1. The BMW N55 TwinPower turbo is a single Turbo engine with two separate exhaust runners powering the hot side of the turbo. ACL N55 RACE COATED ROD BEARINGS STD SIZE $ 208.29. VTT Billet N54/N55 Vacuum/Boost Adapter $ 40.00 – $ 55.00. A meth kit or port injection is recommended. Here’s a couple for you on the World Wide Web and Youtube. 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