N54 lpfp log Jan 20, 2020 · 0x46464 with a conversion of (X*5. The programming doesn't seem to have negatively changed driving feel. I have been running a custom E50 tune for about 5 months no issues. The car doesn't seem to have any issues other than the lack of rail pressure at WOT on the log and cutting spark when it drops. 0L, BMW 335is N54 3. During WOT logs it goes up and I'm reaching the 70--80 psi range and meeting fueling AFR targets of 12. I am a bit nervous to venture too fair in the car at the moment. Any chance you have the lpfp target for ina0s as well? Jan 3, 2011 · This recall letter is a bunch of BS. If your current Low Pressure Fuel Pump (LPFP) is struggling to keep up, is old and tired, or you need an E85-compatible solution in an OEM pump assembly, this is the upgrade for you! Nov 20, 2022 · Spool Helix HPFP overdrive system Spool Performance is really excited to introduce our latest product offering to the N54/early N55 community, the Helix overdrive unit. Oct 15, 2015 · LPFP sits in the tank and feeds the HPFP a constant 72psi; HPFP is mounted on the engine and is chain driven. I'm curious if they're going to just have one of their current setups (which is two N55 pumps, correct?) modified to fit where the flange for our HPFP connects and somehow drive it that way too, or if they'll be going another route for driving it. FYI - As of December 2009, an unconfirmed source from Bimmerfest says BMW has given another try to improve the high pressure fuel pump in the N54 engine. Jan 31, 2019 · One of the most common failures on all BMWs with the N54 (and early N55) engine is the high-pressure fuel pump, regularly referred to as the HPFP. BMW has had multiple recalls for this HPFP on the N54. I have replaced the HPFP with a used unit (120k kms) and replaced all 4 O2 sensors, both with no effect. Sadly my car is in the shop. The stock B58 pump is DONE on pump gas by 450WHP. Clearly the 274 was out of fuel and the 295 is not. The fuel quanitity control valves are controlled differently vs the N54, but a custom electronic input into the HPFP wouldn't be too hard to rig up. Your suggestion is a downgrade on the N54 pump. Your Vehicle BMW E92 335i N54 3. Model-Specific Engine Tuning & Modification Discussion. Jun 11, 2023 · Stock N54 Rotary HPFP have solenoidcontrol by DME PWM signal 2pins. 0L, BMW 335i N54 3. Chris Dec 9, 2018 · The wobble plate 3 piston style pumps of the n54 are fixed displacement pumps per revolution and bleed fuel back to the lowside of the pump to control flow by pwm the solenoid on the pump . Is it a CEL The PFS POD (Planetary Over Drive) is an overspeed gearbox for your 1 &amp; 3 series N54 high pressure fuel pump. I didn´t expect an idea so fast. Jul 30, 2019 · Glad to see we'll have 4-7 DI only setups this year lol. 0L, BMW 535i N54 3. MHD with JB4. Mar 28, 2020 · As the short code description suggests, this is usually a fault with the low-pressure fuel pump sensor. We take our already robust stage 2 design utilizing all its ground breaking features, and machine the compressor housing to take the highest flowing wheels in the TD04 family to provide the ultimate in N54 stock frame power Dec 24, 2017 · BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > LPFP upgrade worth it? Google Search Search Forums Low pressure fuel pump ABS sensor Timing belt (oil filter housing gasket was leaking onto my old belt which weakens it. This Spool Performance Spool Performance Helix HPFP Overdrive Unit (Mfg#SP-54HX-1) fits BMW 1 M Coupe N54 3. Probably not in the 1300+ rail pressure but it'd doable. You could also have a bad HPFP. $549. Instead helix or other aftermarket solutions. Precision Raceworks Bucketed Low-Pressure Fuel Pump Kit - Stage 2 - BMW E9X E8X When upgrading your turbos or increasing your BMW's power potential, it's important not to overlook your fuel pump. Sep 11, 2020 · Buy Here: Fuel-It N54 Stage 2 LPFP. The N54/early n55 high-pressure pump is a very capable and over-engineered piece of hardware. A handful of N54 owners experienced this code but left it alone as the engines were running totally fine. I know the tune itself still has some issues, and I will keep working on it more. The new Walbro 450 pump provides approximately 100% more flow than stock! Aug 3, 2020 · As far as the fuel pressure, I wouldn't worry about it too much yet. 00 Dual Walbro 450 Pumps / Install a return line fitting (+ $25) / Do NOT add a Hobb's switch - $1,024. Helix Jul 5, 2017 · FCPeuro has a re-manufactured one with a lifetime warranty for $400. I thought it could make a decent amount more than this :/. My 335 failed twice, once after 500 miles on the car, solution: re-programmed. This can leak out over time, and cause the pump to not function properly. I'm on one of the newest N54's produced (2011 335is) just now eclipsing 50,000mi, and with the factory HPFP and index 11 injectors I'm draining the rail at about 420hp. N54 Stage 3 LPFP Upgrade. Apr 21, 2023 · Buy OSIAS New Aftermarket High Pressure Fuel Pump For Genuine BMW N53/N54/N55 Engine 135i 335i 335ix 535i 535i 535ix X5 X6 Z4 E70 E90 3. In total, the BMW N54 has two fuel pumps including a low-pressure fuel pump (LPFP) and a high-pressure fuel pump (HPFP). Please enter a search keyword N54 535I (E60) STAGE 2 LPFP UPGRADE. This is a complete Low-Pressure Fuel Pump (LPFP) upgrade that replaces your stock LPFP assembly with a new E85 certified one. Its why we can get 650WHP on 100% E85 by just spinning it a little faster. Includes every thing needed to replace a failed HPFP. $499. Nov 19, 2020 · 3. Mar 6, 2015 · I know there are thousands of threads about the high-pressure fuel pump (HPFP) and that it fails. Dec 6, 2020 · Those familiar with the N54 understand the LPFP is typically the first limitation. I should have ordered the bucket with the 295 from the get go, but I guess I have a 274 if I ever need to go stage 3 LPFP. Cost: $850+ Stage 3 LPFP kits are venturing into the territory of extreme fueling demands. You look to be on either map 1 or stock power levels in the log you posted so you should be having 0 rail pressure issues even if you had 100% E85 in the tank lol. with all the fueling parameters and a dyno sheet that and longevity data would help sell it for me personally Reactions: Torgus , kayzrx82 and fmorelli Aug 22, 2022 · N54 | 6MT | Doc Race 6266 Top Mount Kit v2 | Phoenix Racing Intake Manifold w/ 750cc Injectors | Stage 4 Dual Walbro Hellcat 535 LPFP's | BPM4 Dual Fuel Pump Controller | 100% Custom Fuel Lines w/ Adjustable FPR & Return Line | 7. 00. Login / Register. Dual Walbro 450 Pumps / No return fitting installed. FYI, my LPFP threshold is 60psi. May 9, 2020 · N54 having LPFP spikes over 110psi! 2007 335i e92 Fuel-it stage 3 LPFP 550 cc PI AIC2 Motiv- FF sensor Running e85 In the process of tuning my car, noticed the LPFP pressure was all over the place, dropping below 40 and spikes over 100psi, so I decided to replace the following: HPFP ( FCP After new lpfp + Log Bimmerpost ☰ Model Selection Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain Jul 23, 2019 · Interesting. Note that while many of these parameters are also present in other JB4 applications such as N20, N55, and S55 they may or may not retain the same meaning/use. N54. My tuner thinks its the HPFP and so do I but since I just installed the new LPFP I was wondering if there's anything I should check before I drop $1400CAD on a new HPFP. You don't find many people hitting 500, and certainly very few that manage to go above it. I'm honestly shocked it's taken this long, but hey at least its here. Product Details. This Precision Raceworks Low-Pressure Bucketed Fuel Pump Kit - Stage 2. So I don't know the reason, but it behaves the same as stock, so I'm not concerned. 0L. When running 98RON through the motor at 17 psi, my rail pressure is above 1700, however after mixing in E30/E40 the rail pressure now tanks hard on 19psi. (Unlike other similar looking kits we use high quality OEM buckets and float assemblies for assembly ensuring trouble free operation long term). 306721599145)*0. / Do NOT add a Hobb's switch - $999. I bought the reman n54 hpfp. 00 Dual Walbro 450 Pumps / No return fitting installed. 0-liter twin-turbo inline-six powerplant. May 27, 2021 · N54 LPFP Pressure Target issues. Dec 9, 2018 · The N54 rotary pump far outflows any of those cam style pumps. Trade-in: (Domestic and Canada) Jun 7, 2017 · Decided to take a crack at coming up with possible fixes of the failures for the N54/Early N55 HPFP's and possible upgrades and we all know they are needed for these cars. At the N54's 72psi of pressure, the Walbro flows approx 350LHP. Having said that the LPFP is plenty for say, 500hp or so, so the HPFP will reach its fuel limit long before the LPFP assuming the LPFP is working properly. They do a good job supplying fuel at high pressures at stock power levels. 50-60 and the HPFP supply starts to become more inconsistent which can cause you to run lean. But like most fuel pumps, flow falls off rather abruptly as pressure goes up. Rail pressure was solid at about 2250 psi with accelerated slammed. It’s one of the bigger flaws with the N55, in our opinion. 014503773773 stock should be 580psi Thank you. N55 vac pump / fuel pump housing also have cam possition sensor i question i can just leave it not connected. Jan 27, 2021 · You can calculate one WGDC base final value or paste a MHD log and draw a graph from it. Car has been maintained meticulously since day 1 (2008). ANYONE who believes there are "Alternate Facts" to those stated above, please enlighten. We have been testing this for almost a year now and here it is finally in a release post. This was the case with my pump. 0L, BMW sDrive35i N54 3. One value calculation cells: B26, B27 (final: E27 and B68, sub calculations: B28, B33, B34, B55, B64) Emulation from MHD log: B74 F74 Copy the original log file, delete every column but these: time, setpoint, maf, rpm, wgdc base BMW E-Chassis Walbro Stage 2 LPFP Upgrade for the N54 & N55 Motors. 5v2 (Mfg#601-0177) fits BMW E82 1 M Coupe, BMW E82 128i, BMW E82 135i, BMW E88 128i, BMW E88 135i, BMW E90 325i, BMW E90 325xi, BMW E90 328i, BMW E90 328xi, BMW E90 330i, BMW E90 330xi, BMW E90 335d, BMW E90 335i, BMW E90 335xi, BMW E92 328i, BMW E92 328xi, BMW E92 335i, BMW E92 335is, BMW E92 335xi, BMW E93 328Ci, BMW E93 Aug 12, 2021 · Is your lpfp dipping? Or strictly hpfp dipping? Built Block - Stock Comp/H Beam Rods - Ported/Built Head w/ Shrick HL Cams & Valvetrain - Pulsar 7170G - Walbro 525 & 535 Bucketless - SpoolnMS CC - FF PI Intake Mani - MaxxECU - 8HP70 BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Anyone running a single Walbro 525 LPFP in their N54 335's? This is the most i have watched LPFP at idle, the new ekpm3 will appear to try and hold 66psi, it will float up to 67/68 then suddenly dip to 56-58psi for a split second and back up to 66 and repeat every 30-45 seconds. i have a bmw 135i N54 DCI bmw performance exhaust and COBB stage1 and i have noticed sometimes after some WOT runs all the way to redline when i come to a complete stop after 10 seconds the HPFP shoots up to 2,200 PSI and sits there and after 10 seconds the injector(s) start to tick louder like its being put under enormous If LPFP reading is pinned, bad sensor. This is a complete plug and play solution to replace your stock Low Pressure Fuel Pump (LPFP) with a new E85 certified bucketless assembly. Nov 28, 2015 · hey everyone, first post ever i was wondering if someone could help. The PFS POD allows the user to increase the shaft speed 3x, drastically increasing the output capabili Nov 24, 2020 · 3. This solution provides up to 25% more flow than Fuel-It! standard Stage 2 upgrade, up to 100% more flow than stock, and includes the following: Dec 18, 2023 · The car is a N54 335i, TD03-15T turbo, PR Stage 2 LPFP (retaining venturi). There's been at least a half dozen or so crack 600whp on hybrids with just a stage 2 LPFP (bucketless) on e40 - e50. Jul 29, 2020 · 550whp should be easily reached on e40 - e50 with just a stage 2 LPFP. LPFP UPGRADE OPTIONS This is a complete Low Pressure Nov 24, 2020 · 3. 0L: Electric Fuel Pumps - Amazon. The secondary Kitties might have trouble with that but they work until today also with my medium 1sec burble. From what I've observed on my own car, sometimes, presumably when the fuel system is unable to maintain its target, it will go into a sort of "failsafe" mode where it disables the closed loop correction and runs a static 55% duty cycle at lower loads, and 100% at WOT. . I really appreciate that. 5" FMIC Oil catch can Additional oil cooler B58 OEM coils & DIY support NGK 97506 2-step colder sparkplugs Valvoline VR1 RACING 5W-50 oil Fueling New OEM HPFP LPFP Walbro 450 in original bucket LPFP pressure sensor retrofit (Z4 does not have this from the factory) I'm on E45 mix (50:50 98oct and E85). 0 on 93 octane / 22 psi. Its will be easy solution to fix old n54 hpfp nightmares. Installed it and worked great for about 10 miles. Again, if LPFP pressure is 65psi+ then you probably have a HPFP issue. But does the above lpfp behaviour seem normal? Mar 13, 2018 · Why is it that BMW used the fuel rail from the N53 on the 135i and 1M N54 cars which is a different part number from the fuel rail thats on all other N54 3, 5, 7 series, X6, and Z4 cars ? Logically since the 1M is rated the most powerful N54 car using the N53 fuel rail, would this be suggesting the N53 fuel rail part number has better flow ? Nov 29, 2018 · The story of LPFP running at low RPM when starting is BS, they both work together, although the lpfp is pumping, the HPFP is the one that does majority of the work, including cold starts, this does not mean to say your issue is the same could be LPFP, my advice, get your self some wynns fuel system cleaner and run that with a tank before Mar 8, 2018 · N54 having LPFP spikes over 110psi! 2007 335i e92 Fuel-it stage 3 LPFP 550 cc PI AIC2 Motiv- FF sensor Running e85 In the process of tuning my car, noticed the LPFP pressure was all over the place, dropping below 40 and spikes over 100psi, so I decided to replace the following: HPFP ( FCP TORQBFM SOFTWARE DOWNLOAD CLICK HERE As many of you may have heard, we have been working with Torqbyte on developing of a fully integrated PT-CAN -based LPFP control module for performance-minded owners that prefer doing things the right way rather than entrusting their car’s fueling to other less technologically advanced solutions on the market. This causes the car to blast the radiator fan to full power and go into limp mode. But that is exactly the problem: After browsing so many search hits, I have not been able to find a conclusive description of the early symptoms or the typical chronology of a failure. Here is a quick reference to the JB4 N54 logging parameters and their general meaning as of ISO v31 firmware. When the HPFP starts to fail, it's common for the car to go into limp mode, and in severe cases can leave you stranded waiting for a tow. LPFP is what primes when you first start the car, that's the whirring noise that can be heard when unlocking the car. The car has the following bolt ons: catless downpipes, upgraded inlets, chargepipe and intercooler. Where's everyone getting their pumps from nowadays? Has anyone made any advancements for the N54 HPFP? Just had a custom tune done and I'm running more E85. In the log, shortly after it's brought on, fuel pressure hits 80psi, then Feb 1, 2010 · The "HPFP" is the common abbreviation for the "high-pressure fuel pump" used on BMW's direct-injected "N54" 3. May 19, 2023 · The high-pressure fuel pump is one of the most important elements of the N54’s fueling system. If car randomly dies, and LPFP is inconsistent, it's likely EKP. 0L, BMW 740Li N54 3. When running 98RON through the motor at 17 psi, my rail pressure is above 1700, however after mixing in E30/E40 the rail pressure now tanks hard on Jun 2, 2019 · I'm really interested in a log of this thing on a big turbo car. com FREE DELIVERY possible on eligible purchases Jan 18, 2010 · Does the imminent appearance of the N55 mean that BMW have quit on the N54 twin-turbo engine and redesigning the HPFP to meet the needs of current owners? Is the 10-year HPFP warranty a business decision to forego resolving the pump issue for N54 models, affording the most economic solution over re-engineering a component of an engine that will Dec 2, 2020 · Note, you could technically have a supply-side issue – if the LPFP is unable to supply enough fuel to the HPFP then you could see a HPFP crash even if the HPFP and tune are fine. May 4, 2019 · BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Normal lpfp psi readings Google Search Search Forums This is a complete Low Pressure Fuel Pump (LPFP) upgrade that replaces your stock LPFP assembly with a new E85 certified one. Both low and high-pressure fuel pumps can only flow so much fuel, limiting power potential regardless of turbo size or other power adders, especially Aug 19, 2019 · In this section, we will include data logs from our beta and pre-release units along with details on the car from which the log is presented for Helix that is scheduled for release. Oct 15, 2023 · RB N54 PCV valve 7. 0L, BMW X6 We are proud to introduce the latest in our line of N54 turbocharger products the VTT Stage 2+ hybrid turbochargers. Jun 7, 2019 · Jake Yamona defined the same tables for his N54 test car and did some testing, he found there was not as much additional capacity due to the higher stock duty cycle. I've had some time to put some miles on and all seems well. Apr 28, 2015 · In general you want to log your short term fuel trims (STFTs) on both banks as well as long term fuel trims (LTFTs) on both banks and ensure that they're not being maxed in either direction. I have a 2011 135 (n55) fuel it stg2 lpfp, hpfp is 6 months old. So pressure tables should be adjusted accordingly, assuming the n55 tables are defined at some point. There is NO information at this time as to when this pump will be released or used. Logs and details for the Helix Extreme version will be released closer to its launch. This approach is better than the first. / Add a 15psi Hobb's switch (+ $40) - $1,039. SKU: 13-51-7-616-170; Other Names: Mechanical Fuel Pump, High Pressure Pump 135010; Description: N54, N55 High Pressure Fuel Pump. 0L, BMW sDrive35is N54 3. co Dec 19, 2020 · <50PSI sustained LPFP (Low Pressure Fuel Pump) is not acceptable - The occasional dip below 50PSI is not usually a cause for concern, it’s a sustained pressure below 50PSI that is typically indicative of a failing LPFP or perhaps a high ethanol content fuel coupled with an aggressive tune, in either case the LPFP should be addressed. I'm pretty sure there is a mechanical relief valve inside that alllows pressure bleed out and return back into the LPFP system. 00 Dual Walbro 450 Pumps / Install a return line fitting (+ $25) / Add a 15psi Hobb's switch (+ $40 Mar 13, 2018 · Inspired by martymil’s post I decided to pull my HPFP filter, drill my fuel rail, add an inline filter and upgrade the line from the tank to the HPFP hard line. The description gives me enough trust that i do not see harming potential for the engine so it´ll be worth a try. Second time at 15,000 miles, solution, replace fuel pump (12/2/10). Includes new high and low pressure fuel sensors, gaskets, and Genuine BMW pump. High pressure pump. The current part number as of 12/09 for the HPFP ends in 881. 00 $495. The rest of your log looks as if you were just driving around in traffic. As we start tuning and pushing more power, we start seeing drops in the high pressure. My tuner is recommending I go with a stage 2 fuel pump upgrade but I'm wondering if I can get away with just replacing the stock lpfp with a new one or do Dec 28, 2010 · I had the HPFP, new programming, and a low pressure fuel sensor replaced a few days ago as part of the N54 recall. Sep 3, 2023 · The hpfp is filled with hydraulic fluid (CHF11S). Announcement Vargasturbo Turbo Technologies offers N54 turbocharger upgrades for BMW models, providing enhanced performance and reliability. Hello everyone, I'm having issues with my 2008 BMW 335i E93 N54-engine that is testing the limits of my patience: On April 6, 2020 at 92562 miles, I was getting problem codes P2B2C (High Pressure Fuel, plausibility, cold start) and P29F2 (High Pressure Fuel System, Fuel Pressure). Fuel it stage 2 lpfp afe gt momentum JB4 w/ mhd bef custom tune Ive always read that anything below 1000 psi is a weak hpfp. I've yet to dyno but my car traps 130 on E30 with just a bucketed stage 2 pump. E Chassis 135i, 335i, and X1 Stage 2 Bucketless LPFP Upgrades. George If you are making over 600whp and your LPFP pressures are dropping, this is the solution for you! This is the most powerful LPFP upgrade available and it still utilizes the OEM stock bucket and retains all the factory venturi's and fuel transfer systems in the tank while bypassing all the factory restrictions to maintain higher pressures and greater flows. Rail pressure stays around 2000psi or higher but I noticed my low pressure starts at ~70psi at the start of the pull but then drops down to 50-55psi from 5500-redline. Iirc the issue with Jan 20, 2020 · Wondering if the drop off at the end of the log is not enough HPFP DC, I will test some changes up there. 0L, BMW 535xi N54 3. This is a complete low-Pressure Fuel Pump (LPFP) upgrade that replaces your stock LPFP assembly with a new E85 certified bucketless assembly. Let's face it, the fuel system is the Hi guys, Been chasing a cold start misfire issue for a while so decided to do a 3rd gear WOT log. If you suspect that your HPFP is bad, log the HPFP pressure target along with the actual pressure (you are already logging this) and you can see if the delivered pressure is falling significantly short of what is being requested. This Sep 9, 2017 · I have been contacted by a vendor who has some interesting ideas for an alternate pump(s) config for the N54 but that's low priority with all the projects I'm running -again, we are able to hold 3000+ psi to redline with 750+ whp on 100% E85 on the double barrel shotgun, so out of necessity other projects take priority. Fuel-It’s stage 3 kit features dual Walbro 450 or 525 pumps (option to upgrade one or both pumps for $75 each). This Assembled By ECS High Pressure Fuel Pump Replacement Kit (Mfg#13517616446rKT) fits BMW N54 3. 3. Mechanical fuel pump flow potential is a function of shaft speed -spin it faster, get more fuel flow. Nov 22, 2018 · Was hoping for a little help. Ive seen logs where people just generally have a weak hpfp and it crashed down to 600-700 sometimes, and ive seen logs where peoples hpfp are fine, they dump in a lot more e85 content than the fuel system can handle, and it crashes down to 600-700 lol This is a complete Low Pressure Fuel Pump (LPFP) upgrade that replaces your stock LPFP assembly with a new E85 certified one. Dec 16, 2023 · Hey guys, having some trouble with my high side fuel pressure and was hoping for some help. 00; If your current Low Pressure Fuel Pump (LPFP) is struggling to keep up, is May 3, 2022 · I'm seeing big drops in rail pressure. A Walbro flows 420 liters per hour (LPH) at 43psi. If LPFP dips, it's the pump, line, venturi, etc. See full list on bmwtuning. This solution provides up to 25% more flow than our standard Stage 2 LPFP upgrade and up to 150% more flow than the stock pump. The new HPFP part number is said to end in 943. N54 2FBE (12222) Fault Code Nov 7, 2016 · Hi guys Few days ago I upgraded my lpfp to stage 2 on my 335i n54 2009, FBO stage 2+MHD and all was good until yesterday when I speed up on a highway and after that I received on my Idrive a message about fuel pump and exclamation sign on my dash bordafter I let the gas pedal, the message disappeared in a few seconds and most of the times I get this message on Idrive when I floor it. If I accelerate for more than a couple of seconds the engine shakes and violently jerks the car, cutting the turbos out and shutting off the HPFP. As far as WOT rail pressure, that sounds way too low but I'd need to see the log. There are ways around it like port injection, but that’s not much cheaper. Aug 21, 2018 · 4) Of course those of us with normally-aspirated engines (NO Turbos) only have the LPFP, and YES, anything over ~ 70-75PSIG WOULD be nuts. There are some gains by going straight to the HPFP but people are using a 1/8 npt adapter and the LPFP seals with an o-ring. Jul 24, 2017 · Over the last few months my low pressure fuel pump pressure has been consistently running 52-58 psi no load. Still gets a little spiky up top. 0L, BMW 740i N54 3. Anecdotal. Helix Extreme is still in beta phase and undergoing longevity testing. 0L Engine Fuel Pump High Pressure Fuel Pump. Dec 11, 2020 · BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > What are my options to increase fuel rail pressure? May 3, 2018 · I would say this is the absolute max. On N55 E series increasing the duty allows maxing a PS2 on E50 with no supplemental fueling. Jan 20, 2020 · New log. 0L, BMW 335xi N54 3. Mine likes to hang around 82 psi under no load and low load, but occasionally it's around 72 psi in the same conditions. Would probably require some custom brackets/adapters. 0L, BMW X6 35iX N54 3. Rail pressure drops and matches the low-pressure fuel pump (85 psi). 5" VRSF Race Intercooler | BMS Dual Catch Cans | HKS BOV | Stage II Performance Clutch | Trebila Custom Flex Fuel Tune | M3 Control Arms & Control Arm Bushings | ECS Jan 20, 2020 · On N55's without the changes it seems startup is fine but warm is noisy which is the reverse of the N54. Also, your rail pressure dropping in the first log seems normal, I think it tries to target somewhere around 700 PSI at idle. HPFP takes this input and bumps it to 700-2500ish psi depending on load. N54 Stage 2 Bucketless LPFP. Thread starter nyt; Start date May 26, 2021; Forums. I would be impressed if someone got one of the plunger style variable displacement pumps to work on a motor that came with the n54 style pump. BMW Parts 335i E92 BMW E92 335i N54 3. HPFP upgrades aren’t cheap. When it comes to N55 fueling, the HPFP is the first part of the fueling system to max out. :rofl: So it depends what engine, where you are measuring pressure, and at what engine conditions. 2 weeks ago I went to the track and Im losing rail pressure between 3500-4700rpm when I hit 18psi I’d boost. I'm experiencing similar issues with my low pressure fuel pump operating at around 40 psi. 00 $549. They can snap and get sucked into the engine) My mod list is pretty extensive, which also plays into “you better be able to do your own work if you want to mod an N54”. (Submitted by Emission) Why is everyone concerned about the HPFP? The HPFP has had a very high number of failures over the past few years. 0L, BMW 135i N54 3. Happy driving! This is a complete plug and play Low Pressure Fuel Pump (LPFP) upgrade that replaces your weak stock LPFP assembly with a new E85 certified one in an OEM pump assembly. The car is a N54 335i, TD03-15T turbo, PR Stage 2 LPFP. This will be a project I work on in the side, but through the tear down process is shows a lot and answers a few questions I had about what could be failing and etc. We would personally take this opportunity to upgrade the low-pressure fuel pump for higher E85 mixtures. Jan 20, 2020 · I guess the log will give us the information. I just went back and checked some logs from the stock LPFP and it did the same thing, so this discrepancy isn't unique to an upgraded pump. B58 pump also have 2 pins. This solution provides up to 25% more flow than Fuel-It! standard Stage 2 upgrade, up to 100% more flow than stock, and includes the following: Jan 19, 2020 · I have gone from a stock 135i (N54) low pressure fuel pump due to low psi (52-42psi) readings at idle and throughout RPM range (rail pressure would drop and cause limp mode), to a walbro 450 and have retained the bucket and Venturi to keep it close to stock as possible and hopefully food my low psi issue. Oct 26, 2010 · In a separate action, BMW has notified the National Highway Traffic Safety Administration (NHTSA) that it will voluntarily recall approximately 20,800 MY 2008 X5 Sports Activity Vehicles equipped with normally-aspirated inline six-cylinder engines to replace the low-pressure fuel pump. Too many invalid login attempts, contact I am thinking it wouldn't be too hard to retrofit the pump into an N54. This solution provides up to 300% more flow than stock and this assembly can be purchased one of three ways to meet your needs. The Supra or TU pump is better, but the N54 rotary pump outflows it by a wide margin. On E85 less than 400. The high-pressure fuel pump is located under the intake manifold on the driver’s side of the engine. Sort of disappointed the LPFP seems to be close to out of juice already. <50PSI sustained LPFP (Low Pressure Fuel Pump) is not acceptable - The occasional dip below 50PSI is not usually a cause for concern, it’s a sustained pressure below 50PSI that is typically indicative of a failing LPFP or perhaps a high ethanol content fuel coupled with an aggressive tune, in either case the LPFP should be addressed. Dec 26, 2012 · 2) Replacing the factory LPFP with a Walbro E85 pump. eraf xzvvuc zei uilba olsml aitdnym ieiv bvzo akoe yic pcg hojqhe abyl rugg bnkmeb