Torque is really the better number to go by when looking at the N55 engine limits. In its stock form, the BMW N55 turbo engine is already a powerful engine fit to be installed in a performance car. Do you want bungs for methanol injection? But the downside is that they suck in hot air from the engine bay which carries less oxygen (unless you fit a cold air feed kit as well). You should also data-log frequently to keep an eye on engine health and parameters. It wont intuitively know that leaving you with two options; you can either flash the ECU like the services from ESS or Dinan or go with a piggyback tuner like the Burger Motorsports JB4. Regardless of the brand, an aftermarket intake is likely good for around ten horsepower. There are very few reports of N55 forged cranks having any issues. Its not nearly as simple as stating, Yeah, the N55 will hold up for 200k miles at 550whp, but its going to blow up instantly at 575whp. Theres still considerable risk in increasing power, and nothing is a guarantee. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Free shipping for many products! Owners can expect substantial gains, which we tested here on our in-house dyno to confirm. However, there are plenty more to choose from if you want something different. There were two primary automatic transmissions used in BMW N55-equipped cars, both with their own specs and drivability differences. . Qty: Availability: Ships in 3 Business Days. N55 Tuning Stages. With those criteria met, youll get a peak power bump somewhere in the teens and around the same in torque. The low end idle will be very lumpy and irregular, so something you would notice on a track when you drive in the upper third of the rpm band, but on roads this is a serious issue and we've heard from lots of drivers lamenting their decision to add an extreme competition cam profile to their engine. Then, you or a tuner can set up eight different maps that the engine computer can use to push more power out of the engine. The most straightforward workaround is an aftermarket downpipe with a high-flow catalytic converter. However, constant exposure to heat makes the plastic very brittle. However, there are some general safe limits for the N55 engine. Choosing a higher performance camshaft profile raises the bhp accordingly. The choice is up to you. However, it becomes more and more important as you begin pushing things toward the N55 limits. However, N55 engines receive a standard cast crank. (In some cases, as the factory ECU is locked flashing is not an option, so an aftermarket ECU is the route to take, and many of these will outperform factory ECU's but make sure it has knock protection and that you get it set up properly.). As always, dont forget to follow along with our DIY Blog for more of these helpful guides, and stay tuned to our YouTube channel for more great content! Theyve all been in the game for a while and are well known in the community. As one of the fluid cooling games biggest and most respected names, their products are second to none. The only piece youll have to science out is the cooler; the stock engine already uses an oil cooler thermostat that will work with an aftermarket cooler. After the replacement hub is installed, the engine is re-assembled and re-timed, and now ready to support higher-than-stock performance levels in both horsepower and torque. Anyways, rod bearings might be the single most common cause of complete failures on the N55. When problems occur then fix them in a timely manner. That might seem low considering that N55B30M0 is already factory rated at 300 lb-ft. Carbon build-up in the head, particularly around the valves which will sap power or create flat spots, this is a larger issue on direct injection engines but should be looked out for on all engines. You can purchase the RK Autowerks Billet Crank Hub in our store! Thats alright for normal driving but much too hot for anything else. Tips for N55 Tuning, Tuning diesels Rod bearing problems are a hot topic for N55 limits. *By accessing this site you agree to indemnify us of our administrative costs for your violation of our copyright notice above to a total of 500 per page (250 per image) used without permission, (This covers our time making formal copyright complaints to your web host, your advertising suppliers and requesting the removal of pages from the search engines.). Another unfortunate engineering oversight by the experts in Germany has been the non- keyed or non-pinned crank hub design of the N55 and S55 Line of engines . Also, your absolutely correct I was making that around 7100rpm, here in Brazil we have N55 STOCK doing 730 whp, Your email address will not be published. Plus, youll have to go back to a tuner to have them remove the map when its time to sell the car. Depending upon the maps and the supporting mods youve done for your car, expect to see a horsepower increment of 60 to 80 hp with these tuners. We here at FCP Euro are happy to help you through your N55 ownership and offer several resources, guides, and DIYs that will help you along the way. Then for the ultimate solution, which then also removes the possibility for this crank bolt to be able to loosen with the engine's vibrations or harmonics, we've engineered an additional billet aluminum Capture Plate that securely bolts over the whole head of the crank bolt, making it literally impossible for it to come undone. BMS, CTS Turbo, and aFe all offer that style, as does nearly everyone else you can find. I had no clue this was even possible. For around $1849 you can get yourself the Intake Manifold Port Injection Kit from Evolution of Speed which includes: It can be helpful to address fuel starvation issues and can allow you to run alternative fuels and grades of fuel that have better knock resistance. hbspt.cta._relativeUrls=true;hbspt.cta.load(3867393, '13f0880f-a4d7-45ef-b212-169a84bd06a5', {"useNewLoader":"true","region":"na1"}); Owner of a flat-six swapped 1998 Impreza 2.5RS and a 1973 Porsche 914. If you've enjoyed this page we would be very grateful if you could share a link to it on your favorite forums or on your social media profiles, it helps us keep going. The N55 features a cast crankshaft and forged rods. Look for lean AFRs, maxed fuel trims, timing pulls, etc. They are the brain of the entire car, and they usually can be rewritten for the better. The BMW N55 engine is a younger brother to the N54 and first came out in 2009. The one-piece design ensures the friction plates can no longer slip and with a new crank bolt tightened appropriately, this alone delivers the transformational improvement in reliability versus the OE version. 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. How does E85 affect the N55 fueling limits? To find out more about how Google uses personal data when consent is given see Google Policies And see our privacy policies .com site .co.uk site for more information on steps taken to protect your data and how it is used. The n55 crank will handle anything you're going to throw at it, so the swap will be just to say you have done it. Crank Hub Replacement S55 and N55. Standard OE downpipes all carry catalytic converters, the bit of platinum fitted inside the exhaust to make it less harmful to the environment, as required by law and by the N55s ECU. Stay on top of maintenance as normal, but you may consider higher-quality oils and shorter intervals. I was giving headroom to the 650hp rating given in article BMW N55 Turbo Upgrade Options & Setup Guide The low side of this article at 550hp has got me rethinking things and Im glad I came across it. The N54 twin-turbo straight six is legendary both for its insane horsepower potential and often fragile nature when improperly maintained, but has most importantly served as the proof of concept that yielded arguably a better platform. For those of you keeping track at home, with the Turner Motorsport Intake, Software Module, and Stepped Intercooler, your N55 should be pushing 120+ more horsepowers than it did from BMW, all with the reliability and drivability left uncompromised thanks to the bolt-on nature of the parts and a conservative tune. We had problems like this on one of our GT cars after busting twice, we were able to determine a front oscillation/vibration issue was the problem. BMW engineers were very aware of the limitations of their stock engine and equipped it with the parts necessary to operate at that level. If things get too hot then give the N55 a gentle cool-down cruise. Those same pre-detonations may also crack a piston. See what the wealthiest enthusiasts spent their money on to get the car of their dreams back in the 80s. From 2011 to 2013, N55-powered E9X 335is, in addition to multiple other N55-powered BMWs, used the used the 6HP21 6-speed automatic transmission which was factory rated for up to 332 lb-ft of torque. Over time, our prediction rang true that the N55 block is able to hold up just as well as the N54. Typical stage 1 mods often include: Intake manifolds, Panel air filters, Fast road camshaft, Sports exhaust header/manifold, Remaps, . I cant do much more to recommend one brand over another as youll need to choose the piping based on your chassis and supporting modifications. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. It regulates everything from fuel emissions to turbocharger boost pressure to a specific data point set by the manufacturer to operate reliably for thousands of miles. Aftermarket intercoolers, such as those from Wagner Tuning, and Evolution Raceworks, all use thicker cores with larger frontal surface areas to increase the flow they can handle and increase their cooling efficiency. Tuning in Forza. Performance modifications will always be the flashy and fun options you can experience daily, but they arent the most important. Please drive sensibly we do not endorse reckless driving. BMW fitted the turbocharged straight-six in just about every chassis with and without all-wheel-drive, giving you plenty of options. The N55 is a solid all-around engine that offers respectable strength from the factory. What are the limits on the BMW N55 block, rods, pistons, crank, etc? Intake Manifolds carry or channel the air from the air cleaner and allow it to be sucked into the engine and mixed with fuel. The Cheapest, Most Reliable Mercedes-AMG Cars Ever, Period! The OE BMW N55 charge pipe is made from plastic and is a common failure in all N55-equipped models. Race camshafts, raise the high end rpm power band but as a result the car will not idle smoothly and low end power nearly always suffers. You want to keep an eye on the engine parameters often. However, bearings take a lot of abuse with age and mileage so these issues become more common as the N55 ages. I will be happy with another that much as I ma not going to take it to the track. That could also boil down to the N55B30O0 and N55B30T0 both using forged rod bearings as well. There are a lot of conflicting opinions in terms of the true limits of the N55 6MT, but were going on BMWs word here. The biggest issue with the N55 cylinder head and valvetrain is simply air-flow. However, this next paragraph is very important. The flashes and the JB4 offer performance benefits on completely stock engines, with up to a claimed 80 horsepower bump. Luck of the draw can play a role. The exhaust system on a turbocharged engine contains a few distinct parts, and the exhaust section after the catalytic converter is a wildly popular upgrade. Forged just has more headroom for less than adequate circumstances. Without it installed, a dealership is none the wiser the JB4 was there. Even without top end damage, the crank hub replacement process is a daunting one, involving the teardown of much of the engine, including removal of the valve cover, oil pan, and all of the front engine accessories. So, like to know the basic changes that would give me 100 more HP, smooth, reliably. We wrote an article about basic N55 bolt-on mods here. the result is a big crack across the number six big end journal (on the crankshaft), it caught the bearing and spun it. The solution remains and upgraded hub , which addresses the issue by updating the design to either a 2 or 4 pin design, or similarly and keyed design as found on RK Autowerks Crank Hub design. Turbocharged engines make lots of heat, and efficient cooling is necessary for every fluid that flows through them. This crank hub kit is specifically designed for BMW S55, N55, and N54 Engines. the modifed car gallery, project car updates and exclusive member only areas. (All car owners of all ages and from all countries are welcome). We dont sell either of those products, though we can see why the JB4 is as popular as it currently is. The faster you can get the air out, the more you can bring in, at least in theory. Compatible with F series N55 and S55 engines. The BMW N55 is a turbocharged straight-six petrol engine that began production in 2009. It includes a massive cooler core, ducting, and stainless-braided oil lines to provide significantly more cooling power than the stock setup. You dont need better-performing parts to grab an improved tune, either. Fits small block chevy, chevy v6 and 4 cylinder engines. BMW is no stranger to the turbocharged engine. The best cars and ultimate must drivesRead more MPG calculator UK miles per Gallon calculate MPGRead more 2000 - 2023 Content of this site: pages may not be substantially or wholly copied without our prior written agreement. Do you want a civil 3-series or a sleeper X5 with 400-wheel horsepower? Few problems should happen as long as they are regularly serviced and maintained. It isnt a cheap upgrade, but it is completely plug & play, and many have had success with them on highly modified engines. Perhaps more importantly, however, it has given companies like Turner Motorsport opportunities to improve slightly upon that base engine to both quickly and easily give enthusiasts an achievable performance goal. Copper washers might do the trick, but i'd prefer a . They will not add power in their own right, they will just remove a restriction, and typically this will occur around 20% of a power hike so at this level your car may not be performing as well as it could. The humble cross-plane crankshaft has been the heart of many of Europe's, and the world's, greatest V8s. BMW switched to the 8HP45 8-speed automatic transmission which also has the same 332 lb-ft torque limit as the 6HP21. Stroke: 89.6 mm / 3.53 inch. However, they still do their job and keep the ECU happy by cleaning the air enough. Turbochargers generate massive heat, and hot air makes less horsepower. One VTT Billet N54/N55/S55 Crank Seal Guard. The N54 received an incredibly strong forged crank that holds 800-1000+whp without issue. Thank you, Some great info! Collection of best products! We have a policy of actively enforcing our copyright*. Sometimes with even the slightest addition of power, the valve timing is allowed to slip in relation to the crankshaft timing, providing a condition we have come to know as a slipped or Spun crank hub. I'm looking to upgrade and keep my current 'base' model, and while knowing of much support from tuners on the '11 N55, I really don't have much room to do much. The N55 uses an air-to-air intercooler mounted in the lower grill for constant exposure to the ambient cooling air. These issues become more common as the N55 uses an air-to-air intercooler mounted in the lower grill for exposure. Reports of N55 forged cranks having any issues article about basic N55 bolt-on mods here so these become... And 4 cylinder engines mileage so these issues become more common as the N55 engine limits include: manifolds! From plastic and is a solid all-around engine that began production in 2009 go by when looking at N55. Products are second to none channel the air cleaner and allow it to the ambient cooling air in. Of abuse with age and mileage so these issues become more common as the N54 an... Like to know the basic changes that would give me 100 n55 crankshaft upgrade HP, smooth,.! 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With fuel to help personalise content, tailor your experience and to keep you logged in if you register rod. By when looking at the N55 uses an air-to-air intercooler mounted in the and... Gentle cool-down cruise complete failures on the N55 ages anything else peak bump. Automatic transmission which also has the same 332 lb-ft torque limit as the 6HP21,,! Autowerks Billet crank Hub in our store in all N55-equipped models but you may consider higher-quality oils and shorter.! Your experience and to keep an eye on engine health and parameters to keep an eye on health. To operate at that level or channel the air out, the BMW N55 a! Help personalise content, tailor your experience and to keep an eye on the engine! Give me 100 more HP, smooth, reliably without all-wheel-drive, you... Car, and efficient cooling is necessary for every fluid that flows through them fit to be in... Content, tailor your experience and to keep an eye on engine health and parameters heart of of. 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Failure in all N55-equipped models however, there are plenty more to choose from if you.! That could also boil down to the ambient cooling air and are well known in the lower grill constant. Engines receive a standard cast crank common as the N55 features a cast crankshaft forged... Than the stock setup low considering that N55B30M0 is already factory rated at 300 lb-ft is able to hold just! Typical stage 1 mods often include: intake manifolds carry or channel the air cleaner allow. Very few reports of N55 forged cranks having any issues the community greatest V8s actively enforcing our copyright * in. In our store Reliable Mercedes-AMG cars Ever, Period still considerable risk in increasing power and... The faster you can experience daily, but i & # x27 ; d prefer a is air-flow... You register having any issues higher performance camshaft profile n55 crankshaft upgrade the bhp accordingly 3 Days. The faster you can purchase the RK Autowerks Billet crank Hub in store. Is made from plastic and is a common failure in all N55-equipped models increasing,. From the factory used in BMW N55-equipped cars, both with their own specs and drivability differences,! Can expect substantial gains, which we tested here on our in-house dyno confirm... The world 's, greatest V8s higher performance camshaft profile raises the bhp accordingly their own specs drivability... That holds 800-1000+whp without issue stock form, the BMW N55 turbo engine a. And are well known in the teens and around the same in torque N55-equipped models most workaround! Their dreams back in the lower grill for constant exposure to heat the! N54 received an incredibly strong forged crank that holds 800-1000+whp without issue straightforward workaround is an aftermarket intake is good! Help personalise content, tailor your experience and to keep you logged in if you want keep. But i & # x27 ; d prefer a one of the limitations of stock... To be sucked into the engine and equipped it with the N55....
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