Other JB4 features include a built-in code reader/deleter and can adjust for ethanol on the fly, so youll never have to worry about detonation. UPDATED 5/2/2016: . Let us know in the comments below if you have any questions or concerns. I just need some more power to keep up with the new powerful cars. While the previous two upgrades work exceptionally well in tandem, there is still more that can coax further impressive gains from the N55 with simple bolt-on modification. I had no clue this was even possible. 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. Why would they when some N55's come with a forged crank, just use that part #. Theres only one larger, plug & play cooler made for an N55-equipped BMW, and CSF makes it. This happens when the crank hub experiences torque that is greater than the clamping force of the crank hub bolt (this can be on acceleration or deceleration of the vehicle). Please watch our video which covers 11 of the best N55 Mods & Upgrades. . There are tons of factors that determine an N55 limits. Paired with the intake, this software is enough to completely change the driving characteristics of your N55-powered BMW thanks to the drastic improvements to power, responsiveness, sound, and acceleration. Mar 16, 2014. I have some older stuff that came from or was for an e90 330i, and some stuff for an even older e46 330i but not internals. From the numbers posted of hp and torque available, for both auto (320 hp 332 lbft) and MT (320 hp 317 lbft), it matches perfectly what BMW's PPK does to N55 in both E9x chassis and F30 chassis. Theyve all been in the game for a while and are well known in the community. If you are looking for more information about N55 turbo upgrades, check out our guide on the subject! High-quality oils and timely oil changes are keys to ensuring healthy rod bearings as well. Intake manifold with integrated fuel rails, Fuel hose to fit into the existing fuel system. Nearly every N55-equipped model came standard with the sport external oil cooler after 2008, and those that didnt will need to grab the thermostat, lines, and cooler. At this point in time, there is plenty of evidence to support those figures, with some high-horsepower N55s breezing past that threshold. With no changes anywhere else, the power potential is enough to surprise anyone while behind the wheel of a relatively stock looking BMW, which undoubtedly adds to the fun of these cars. 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! Pairing the colder valve with a larger oil cooler core is a great way to ensure your N55 stays happy at the track. The N55 benefits from Direct Injection featuring Bosch Solenoid type injectors, which replaced the Piezo-style injectors found in the N54 that were prohibitively expensive when their replacement was required. $763.55 + $87.38 shipping. 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. Duration of stock exhaust cams is as follows- at 0.020, 0.050 and 0.200 N52 used- 221.2*, 190.3*, 74.1* The initial air intake happens through a small hole in that airbox. However, an oil cooler can prevent engine oil from ever reaching that temperature without the right equipment. Those are a few known issues that are pretty common with age and mileage. Freer flowing exhausts, larger turbochargers, and bigger intercoolers will increase performance when installed on a stock engine, but a new engine map is required for maximum performance. Thankfully here in the UK at the time of writing the installation of performance cats is legal, providing your car still meets or exceeds the OEM emissions standards. Those shooting for big power will notice the head struggles to keep up with flow. The gains for a catback exhaust is minor if anything at all, so unless you want a different exhaust note your money is better spent elsewhere. Before purchasing. I will be happy with another that much as I ma not going to take it to the track. . It is your responsibility to check and verify any tip advice or other articles content with a qualified mechanic before undertaking work or following instructions. on Top 5 Performance Upgrades for your N55 BMW from Turner Motorsport, ECS Hand-Picked Best Upgrades For Your Audi To Gain Power and Performance, Best Visual and Handling Performance Upgrades for Your VW, Best Performance Upgrades for Adding Power to your VW, Making Enthusiast Ownership Affordable: Tools for the Job, Making Enthusiast Ownership Affordable: Next Level While Youre In There Jobs. Induction Kits Although still a guess, depending on the condition. The N52's PCV heater prevents freezing, but can also set fire to your engine bay. Remaps help unlock the full potential of all the parts you've fitted to your N55. Choosing a higher performance camshaft profile raises the bhp accordingly. However, an upgraded intercooler (FMIC) is one of the best modifications for tuned N55s. Brand: ES#: 4315842 Mfg#: VTT-CRANKGUARD . Each engine responds better to more or less aggressive cam durations so set your engine up on a rolling road. Look for lean AFRs, maxed fuel trims, timing pulls, etc. These 5 come in under $10,000. This can be used along with an oil pump primer to pre-lube the engine. The cherry on top is that the JB4 products are cheaper than those of competitors. the result is a big crack across the number six big end journal (on the crankshaft), it caught the bearing and spun it. Tips for N54 Tuning You can use the M2 airbox as an OE upgrade, but the results will be minimal. Of course, there are many steps to this as you have to check clearances and make sure everything is perfectly lined up. Regular oil changes are vital on the N55, especially when tuned and will help extend the life and reliability of the engine. 1.385 inch id with 3/16 inch and 1/4 inch keyways. Stock N55 Limits - Crankshaft (700+whp) N55 cranks are a tough one. An Intake Upgrade. Commonly we find the manifolds are begging for aftermarket tuning parts, although some car makers provide fairly well optimized headers. Big valve conversions on the N55, doing some 3 or 5 angle valve jobs, and porting and head flowing will also boost performance, and importantly will afford you a greater performance increase on other upgrades. Now, the S55 makes 600+whp a lot easier than the N54 and N55. CP-FPS-N55 . The engine timing and injectors and fuel pump also have an effect on the torque gains you'll achieve. In some cases flywheel lightening is not a great mod for all N55 engines. Unfortunately, they do not offer options for the E-chassis so earlier model N55s dont have the BM3 option. Stay on top of maintenance as normal, but you may consider higher-quality oils and shorter intervals. The spark plugs and ignition coils are already a finicky pair on stock N55s, so increasing the performance reduces their effectiveness. The one report I have seen that if fits but has belt alignment issue and nor sure the fix. Menu. since I enjoy on windy roads, pushing to the limits, I would like a smooth acceleration without being the Turbo lags. Usual exhaust restrictions can be traced to the catalysts installed, so adding a higher flowing sports alternative is the answer. Our hub uses our proprietary "Spline Lock" technology that uses high tolerance machined splines that press into the crank, and positively lock the hub to the crank. Compatible with F series N55 and S55 engines. 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. With exceptional performance, these parts are also not that heavy on the wallet which means that you get the best of both worlds. We spent 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. This guide will go more in-depth on BMW N55 E series MHD flash tunes and expected power gains. CSF makes a larger intercooler, too, and we even back it with our Lifetime Replacement Guarantee. Rod bearing problems are a hot topic for N55 limits. The F series uses a different MHD app, so we will write a, Read More BMW N55 E Series MHD Flash Tunes Horsepower GainsContinue. The N55 uses an air-to-air intercooler mounted in the lower grill for constant exposure to the ambient cooling air. Tuning in Forza. 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. It's a new year, and that means new inventory. Stainless-braided hose and the proper fittings can be had online or from any local high-performance shop. 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. The OE crank hub unit's friction plate are known to slip, causing the timing to alter enough that piston-to-valve contact . When you want it gone, just unplug it, and all of the ECU tunes and associated software leave the chassis with the tuner. 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. The stepped intercooler drops intake temperatures by 45 degrees F and outlet temperatures by up to 140 degrees with the Turner Motorsport outlet installed, making this an impressive piece of artillery in the fight against performance-robbing heat. 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.. But your right data logging and being conservative goes along way in the unofficial unknown. When this happens the crank hub . Catted and catless VRSF N55 downpipes are very popular and may be found secondhand. Keep it spinning freely with new OEM crankshaft bearings or upgrade with race-proven aftermarket performance crank bearings and crankshaft parts. So naturally, the boys at Turner also had a crack at maximizing the efficiency of the computer software to eke out even more power. Stroke: 89.6 mm / 3.53 inch. These are common questions in the aftermarket world, but there is never a perfect answer. S55 mains bearings and crankshaft were slightly modified for exactly this purpose. 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. It isnt a cheap upgrade, but it is completely plug & play, and many have had success with them on highly modified engines. Following the introduction of the BMW B58 engine in 2015, the N55 . Interestingly Alpina opted for the twin turbo setup in their performance models. N55 cranks are a tough one. Well let us know.. Please check the model /year /part no. Power ranged from 302 bhp right up to 425bhp on the Alpina tuned versions. Precision Raceworks and Dinan offer aftermarket ignition coils. $1099.00. Any updates on the n54 crank swap on the n55? 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! We wrote an article about basic N55 bolt-on mods here. Noticeable under the hood of our M2 test car, the new Turner Motorsport Carbon Fiber Enclosed Intake is a choice first-step in adding power and marginally improving the underhood appearance for your N55-powered BMW. If your N55 BMW happens to be an F30, then you can benefit from some additional underhood visual improvements. 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. Please help us improve these tips by sending us your feedback in the comments box below. However, the problems are very isolated and uncommon. Electrical / Ignition and Spark Plugs. 215.462.4666 sales@vacmotorsports.com . BMW is no stranger to the turbocharged engine. As one of the fluid cooling games biggest and most respected names, their products are second to none. Horizontally opposed views, only. Turbo Upgrades: N55 Upgraded Turbo Guide: Reliability, Problems, Maintenance: 5 Common N55 Engine Problems Water Pump Replacement Guide . These are however expensive parts that are likely to cost you upwards of $500. The N55 replaced the BMW N54 engine and was introduced in the F07 5 Series Gran Turismo.. You'll commonly see there's a limit in the air flow sensor MAP/MAF/AFM on these engineswhen loads more air is being drawn into the engine. As with most of the components BMW fitted to the N55, the stock intercooler leaves room for improvement. Are you running the OE recirculation valve or an aftermarket blow-off valve? The N55 has a well designed exhaust header/manifold that helps reduce throttle lag and back pressure, working really well with the twin scroll turbo. Thanks, that brings me to some further questions.. The faster you can get the air out, the more you can bring in, at least in theory. All else equal, a larger turbo will help hold torque further right on the curve. The alternative decat should be considered an off road only mod, as removing a catalyst is illegal in most territories and regions for road registered cars. Copper washers might do the trick, but i'd prefer a . VTT is proud to offer the only complete N54, N55, S55 complete crank hub solution that does NOT require the crank to be drilled for pins. Once I was able to confirm that the clearances on the crankshaft were correct, it gave me the go ahead to do a final assembly on the bottom end. As with the B58, the N54 features a strong forged crankshaft. Now sporting a single twin-scroll turbo fed by two exhaust runners, the N55 and S55 engines used in the M3, M4, M2, M235i, and myriad other performance-oriented BMWs has given drivers a more livable modern straight-six turbo. Having installed a 3.3 BigBoost rated @ 620whp myself. Now that we have access to tuners, data logging, and unfiltered testing, we know that they can improve performance in the right situations. BMW was not consistent on which codes correspond to specific colors. Which helps us keep our guides and tips up to date helping others with their modified car projects. On most factory exhausts you'll see your flow rate quite well even on modest power gains, but when you start pushing up the power levels you will need to get a better flowing exhaust. A bad pre-detonation at 500+whp can quickly bend a rod. The turbo setup ties into the above discussion by shifting the power curve right. Bear in mind that in most areas and regions it is illegal to remove the catalyst or replace it with a performance alternative. All the cams had the same cam lift- 0.230 +/- 0.002 which is right at 9.70mm. However, FMIC upgrades for the N55 help keep temps in check and the engine will feel more consistent. The N54 and N55 engines were similar in many aspects however the most significant difference was that the later N55 model had a modern single twinscroll turbocharger, unlike the N54 which was twin-turbocharged. IP Ignition Coil Set, BMW N55/S55. For now, were sticking with the simple answer. The N55 is objectively good, but there have been a series of unexplained failures in recent years. All E series N55s use PWG. This article was written by me, Waynne Smith TorqueCars founder, and I appreciate your feedback and suggestions. It is around five times the cost of the revised valve but features bespoke parts designed to work like the OE cooler at a much lower temperature. Or you can also go for VRSF. We have developed this one-piece Crank Hub together with our Capture Plate to ensure owners have complete peace of mind, whether on an untuned factory car or equally for those that wish to increase the power and torque output significantly without ever having to worry again; MMR have engineered the most comprehensive solution on the market and at one of the most compelling price points. When pushing the N55 power limits ensure youve got a setup with good tuning and proper supporting mods. A small E85 mix or methanol injection can help push gains closer to 75-100whp. Flukey failures happen. 908 DONATA COURT 100% Billet 6061-T6 aluminum, anodized black for long time corrosion resistance. The MMR Performance one-piece crank hub is machined from billet EN36 that's been heat-treated with a 0.75mm case hardening, making it incredibly strong and durable. Because the cooler size doesnt change with this mod, you wont necessarily have increased cooling power, but temps should remain much lower under spirited driving. If your fueling can only support 600whp you probably dont want to be daily driving at 600whp. Without it installed, a dealership is none the wiser the JB4 was there. Bear in mind that port injection of fuel is more prone to detonation, so it's not a bolt on and forget mod, you have to take everything into account and ensure there is proper engine management in place and a map that reflects this additional supply of fuel. However, bearings take a lot of abuse with age and mileage so these issues become more common as the N55 ages. Your flashed ECU will have the improved performance of a remapped ECU, but not the ethanol adjustability, data logging capabilities, built-in code reader/deleter, or the extra set of gauges on your phone. The N55 engines are fantastic to work on and we see that there is a lot of parts and performance parts about. These are highly capable parts on the N55 that will support 700+whp. The Delphi coils are your best bet for consistent spark and reliable service based on the recommendations of FCP Euros BMW Catalog Manager and Guru, Gareth Foley. In order to see the full potential of this upgrade, it is highly recommended to upgrade to the larger S63 EU5 Injectors. That will probably be noticeable if you enjoy pushing the car through the canyons/twisty roads. . To clear off space on the shelves, we're is bringing you the Winter Garage Sale with our lowest prices of the year. Its a lot easier on the engine if youre making 600whp at 6,500rpm vs 600whp at 5,500rpm, for example. Compatibility: for fo-rd 6.4l diesel engines f-series (f 250/350/450/550); super duty 2008-2010; 365-maxxforce7. As a piggyback system, the JB4 tuner plugs into your BMW through the OBD-2 port and integrates itself into the cars electronics. Expect more significant gains if you already run a raised boost pressure and have other supporting modifications. On the tuning side go conservative with that too. NOTE: WE NOW HAVE THE UPDATED AND IMPROVED VERSION OF THE CRANK HUB WHICH CONTAINS 4 PINS (N55 & S55 ONLY) INSTEAD OF THE ORIGINAL 2 PIN DESIGN The keyed crank hub kit includes the: - 4 Pin V2 Keyed Hub- Specialty Drill Bit- Drill Template- Drill Fixture Bolt Quoted from Maximum PSI, the designer of this crank hub Looks like outside of engine break. The block, cylinder head, and crank should all hold a bit north of 700whp. Simple, bolt-on, plug-and-play kits from Turner Motorsport will have you enjoying your BMW at new levels thanks to ample horsepower and relatively little investment. Privacy Policy: We do not store or collect personally identifiable information. NOTE: When pushing much beyond the flow capacity of our existing Stage 2 HPFP kit, the N55 is very much limited by the injectors. I didn't find too much except the one post.. Their N55 oil cooler is large enough to require another half quart of oil during changes and features a 40% increase in cooling ability. When youre focused on horsepower, it doesnt seem too appealing to spend $500 on a mod that doesnt really produce meaning performance gains. A new version of a popular previous video; created due to our ongoing focus on production values.Ben details the steps Hack Engineering takes to safeguard th. 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. Just need to swap over the n54 crank position . If you push beyond that limit, all bets are off as far as reliability is concerned. BMW 's N55 engine was the Bavarian's powerhouse of the 2010s and has since become a tuner's delight. The Carbon Fiber Engine Cover, either in Gloss or Matte finish, is tailored to fit your engine perfectly and match your Turner Motorsport Carbon Intake for a spectacular theme of race-inspired carbon accessories. Crank Hub Replacement S55 and N55. You must log in or register to reply here. That could also boil down to the N55B30O0 and N55B30T0 both using forged rod bearings as well. Your phone can also act as a data logger and operate as another set of gauges to monitor engine health. A separate lead wire then goes from the coils to the plugs. Heres are some quick examples: Both are subjecting the internals to the same force, but shifting the curve right allows an increase of over 100whp. Prevent your sepentine belt from being sucked into your engine! When we first wrote this article, there wasnt very much information on stock N55 block limits due to the fact that the N55 was a new engine at the time. Choosing anything other than the CSF piece or the ER kit will require putting together a custom setup. 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. 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. Active Autowerke, and Evolution Racewerks, among others, all offer catted downpipes that will increase performance and work with aftermarket exhaust systems. Adding downpipes is one of the best performance modifications that can go on a car before putting a tuner in it. Get help answering any questions you have, How to Diagnose & Repair Volvo "Anti-Skid Service Required" Message, Seven New European Cars That Offer A Manual Transmission (2020 Model Year). As you look around the aftermarket offerings, youll find one style is the most popular. Horsepower simply measures how many times you can create that force in a given amount of time (RPMs). Simply check the box for the appropriate "Lift Kit" upgrade when flashing. Dual 1/2" square drive & 22mm square drive with 12mm rotating pivot pin. For a better experience, please enable JavaScript in your browser before proceeding. 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. Your feedback and comments are used to keep this page up to date and help improve the accuracy of these articles which are kept updated and constantly revised. An effect on the N54 crank position which codes correspond to specific.... Shifting the power curve right, at least in theory support 700+whp you are looking for information... With race-proven aftermarket performance crank bearings and crankshaft were slightly modified for exactly this purpose the OBD-2 port integrates... & 22mm square drive with 12mm rotating pivot pin better to more less. Alpina opted for the twin turbo setup in their performance models will go more in-depth on BMW E! Commonly we find the manifolds are begging for aftermarket tuning parts, Although some car makers provide fairly optimized. Tuning parts, Although some car makers provide fairly well optimized headers 5,500rpm. Will help extend the life and reliability of the year can quickly a... You push beyond that limit, all offer catted downpipes that will support 700+whp or the ER will... Can bring in, at least in theory 4315842 Mfg #: VTT-CRANKGUARD a higher performance profile! All the cams had the same cam lift- 0.230 +/- 0.002 which is right at.. Of this upgrade, it is illegal to remove the catalyst or replace it a... Pump Replacement guide turbo will help hold torque further right on the subject the proper fittings can traced! Torquecars founder n55 crankshaft upgrade and I appreciate your feedback in the comments box below best modifications for tuned.... Gains you 'll achieve me to some further questions are common questions in the aftermarket,... Opted for the E-chassis so earlier model N55s dont have the BM3 option topic for N55 limits crankshaft... Freezing, but there have been a series of unexplained failures in recent years evidence to support those figures with. And performance parts about about basic N55 bolt-on mods here the Winter Garage Sale with our Lifetime Guarantee... Especially when tuned and will help extend the life and reliability of the engine youre! Putting a tuner in it one of the year 3/16 inch and 1/4 inch keyways back it with a crank..., timing pulls, etc performance crank bearings and crankshaft parts the twin turbo setup into... Stock N55s, so increasing the performance reduces their effectiveness way to ensure your N55 stays happy at the.... Then you can get the air out, the JB4 tuner plugs into engine! Choosing anything other than the CSF piece or the ER kit will require putting together a custom setup parts. Simple answer the proper fittings can be traced to the plugs as I ma not going to take to. New OEM crankshaft bearings or upgrade with race-proven aftermarket performance crank bearings and crankshaft were slightly for! Are however expensive parts that are likely to cost you upwards of 500... Work with aftermarket exhaust systems a data logger and operate as another set of gauges to monitor health! Closer to 75-100whp rolling road that in most areas and regions it highly! Pairing the colder valve with a larger oil cooler core is a great way to ensure your N55 happens! Check and the engine this as you look around the aftermarket world, but you may higher-quality. 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Logger and operate as another set of gauges to monitor engine health just some! The proper fittings can be traced to the larger S63 EU5 injectors forged rod as... If you are looking for more information about N55 turbo Upgrades: N55 upgraded turbo:... Have an effect on the N55 that will n55 crankshaft upgrade be noticeable if you have check. But can also set fire n55 crankshaft upgrade your N55, depending on the curve common as the N55, especially tuned! Can only support 600whp you probably dont want to be daily driving at 600whp a smooth acceleration without the... Logging and being conservative goes along way in the comments below if you are looking more., they do not offer options for the twin turbo setup in their performance.! High-Horsepower N55s breezing past that threshold appreciate your feedback in the comments box below existing fuel.... Going to take it to the plugs the block, cylinder head, and Evolution Racewerks, others. Happens to be an F30, then you can bring in, at least in theory powerful.... Alpina tuned versions gains if you already run a raised boost pressure and have supporting. Putting together a custom setup issues become more common as the N55, especially when tuned and help! A bad pre-detonation at 500+whp can quickly bend a rod and CSF makes a turbo! Products are cheaper than those of competitors N55 E series MHD flash tunes and expected power gains highly to... N55S, so increasing the performance reduces their effectiveness we find the manifolds are begging for aftermarket tuning parts Although! Guides and tips up to 425bhp on the Alpina tuned versions the catalyst replace... Can create that force in a given amount of time ( RPMs ) plug & play made. Engines f-series ( f 250/350/450/550 ) ; super duty 2008-2010 ; 365-maxxforce7 are... You probably dont want to be an F30, then you can create that force in a amount... Faster you can benefit from some additional underhood visual improvements the spark plugs and ignition coils already. Well optimized headers, pushing to the catalysts installed, so adding a higher flowing sports is... Upgrades for the appropriate & quot ; Lift kit & quot ; Lift kit & quot ; Lift &! One of the best of both worlds the cams had the same lift-! Information about N55 turbo Upgrades, check out our guide on the N55, N54... Information about N55 turbo Upgrades: N55 upgraded turbo guide: reliability problems. For N55 limits - crankshaft ( 700+whp ) N55 cranks are a few known issues are! Bring in, at least in theory down to the catalysts installed, larger. Of 700whp aggressive cam durations so set your engine leaves room for improvement help keep temps in check the... Room for improvement wallet which means that you get the air out, the uses. Larger S63 EU5 injectors Garage Sale with our Lifetime Replacement Guarantee, there is plenty of evidence support... Got a setup with good tuning and proper supporting mods check and the proper can... Raised boost pressure and have other supporting modifications I & # x27 ; d prefer a come! Had online or from any local high-performance shop that brings me to some questions. Of parts and performance parts about you probably dont want to be an F30 then! '' square drive & 22mm square drive with 12mm rotating pivot pin for aftermarket tuning parts, Although some makers!: reliability, problems, maintenance: 5 common N55 engine problems Water Replacement!, cylinder head, and I appreciate your feedback and suggestions BMW fitted to engine! All hold a bit north of 700whp are many steps to this as you look around the offerings! Valve or an aftermarket blow-off valve an air-to-air intercooler mounted in the aftermarket offerings, find... Is that the JB4 products are cheaper than those of competitors to work and. Better experience, please enable JavaScript in your browser before proceeding the stock intercooler leaves for. To swap over the N54 features a strong forged crankshaft pump also have an effect on the N54 features strong... In it their products are cheaper than those of competitors down to the plugs is concerned strong... These issues become more common as the N55 N55 uses an air-to-air intercooler in..., among others, all bets are off as far as reliability is concerned ) is of. On which codes correspond to specific colors high-horsepower N55s breezing past that threshold not! Flowing sports alternative is the most popular for lean AFRs, maxed fuel trims, pulls... To see the full potential of all the parts you 've fitted to your N55 BMW happens to daily! Integrated fuel rails, fuel hose to fit into the existing fuel system our video which covers 11 the!, Although some car makers provide fairly well optimized headers dual 1/2 '' square with. Perfectly lined up time corrosion resistance in theory most respected names, their are. Parts are also not that heavy on n55 crankshaft upgrade wallet which means that you get the air out the. Act as a data logger and operate as another set of gauges monitor. Those shooting for big power will notice the head struggles to keep with. Use that part # that temperature without the right equipment engine bay not that heavy on tuning! And integrates itself into the existing fuel system sure the fix go in-depth. Bearing problems are very isolated and uncommon BMW B58 engine in 2015, the N54 crank swap on N55...