We have a deep respect for BMW … Going up you'll find 4 bar air sensors coping with quite large power gains, whereas the OEM air sensor limited bhp and torque at a much lower level.Adding a supercharger or additional turbo will make large bhp and torque gains, although more complex to install. after or before running engine. Key Differences You Need To Know! Overall the N55 improved the N54 and had a good production run from 2009 to 2015, where the B57 engine … We've seen guys spending a lot of money on turbo upgrades on the only to have the whole thing go up in smoke soon after it's been completed.Larger capacity turbos often suffer a bottom end lag, and little turbos spool up really quickly but do not have the high rpm torque gains.Thankfully the market of turbo units is always improving and we commonly find variable vane turbo units, allowing the vane profile is altered according to speed to lower lag and increase top end torque.Twin scroll turbo units divert the exhaust flow into two channels and direct these at differently angled vanes in the turbocharger. The N55 is a better more reliable engine than the N54 was. Thank you for this! Also working from my tablet i had to cut down the photo size. It is the shape and material more than the bore size.Usual exhaust restrictions can be traced to the catalysts installed, so adding a higher flowing sports alternative will help avoid this restriction.The N55 engines are generally reliable and solid as long as they are regularly serviced and maintained.Regular oil changes are vital on the N55, especially when tuned and will help extend the life and reliability of the engine.Oil consumption issues have been noted, due to a PCV crank case valve.Injector failure can cause a misfire, and vibration, and we recommend these are replaced every 50,000 miles.For more information on Tuning your BMW engine please join us in our We love to hear what our visitors have got up to and which upgrades work best for them on each model of car. If you start to detonate by running lean, then you can kill a rod bearing fast. If my car still runs with tune, can I still get after market warranty? Change oil every 5-7k miles with Liqui Moly 5w40.

A great straight six, silky smooth with a DOHC VVT and VVL and was the first straight six to use a twin scroll turbo charger.It made decent power from just 1250rpm, and peaked at around 4500rpm giving a near perfect torque band, hitting the rev limiter at 7000rpm.Throttle lag was virtually non existent, as BMW designed the engine to work and feel like a much larger v8.The twin scroll was fed from bands 1-3 and 4-6 and everything is managed by a Bosch MEVD 17.2 ECU.The N55 really loves higher octane fuel and gives more power and better economy with most drivers claiming costs per mile work out the same as using the low octane fuel.The first BMW engine fitted with a Twin Scroll turbocharger and it boasted valvetronic variable valve lift control and  had new injectors over the N54 it replaced!Overall the N55 improved the N54 and had a good production run from 2009 to 2015, where the B57 engine replaced it.Power ranged from 302 bhp right up to 425bhp on the Alpina tuned versions.You'll find the following versions of the N54 that were fitted to a wide array of BMW's.When talking about the best best for your engine, we are going to focus that give the biggest return for your cash.Altering your camshaft will make a dramatic difference to the engine bhp.

BMW Engine Malfunction Reduced Power Problem warning is a common problem that effects BMW models including 335i, 535i, 745i, X1, X3, X5. I've had the typical OFHG and WP changed at the same time (100k) as well as HPFP, diverter valve, expansion tank, and starter since then. One thing to remember is that we just finally got reliable tuning for these cars. The N55 replaced the BMW N54 engine and was introduced in the F07 5 Series Gran Turismo.. The BMW experts here at Pro Car Mechanics have provided quality auto servicing and maintenance for clients from all over the areas of Gardena, Long Beach, Los Angeles, Glendale, and Anaheim, CA.As the leading dealership alternative in the area, we offer specialized care for BMWs but at up to 30% lower prices than dealerships nearby.

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