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Fuelling
What sets Nostrum apart: 63% more fuel flow than stock CFD optimized damper housing which is welded to the pump for a leak free, durable seal All pumps are flow tested prior to stale Every pump is tested dynamically at multiple engine relevant speeds and target pressures All emissions compatible components (See alternative part number bundle for CARB compliant kit with calibration) Every kit comes with both the new and old style harness options Colored flange options available Unlike the S55 with its factory dual pump setup, the N55 is stuck with a single HPFP, which is one of the biggest limiting factors keeping you from making more horsepower.This is where the Nostrum N55 HPFP kit comes in! Flowing an astounding 63% more fuel than stock, the Nostrum HPFP?s will provide your engine with the additional fuel it so depserately craves. The Nostrum HPFP kit requires no permanent modifications, allowing you to revert your vehicle to stock in the future. Being that these pumps are installed just like the OEM pumps, the installation is far less involved than a vacuum pump style kit. Our pumps are completely ethanol compatible, giving you the added benefit of being able to run e85 or blended ethanol fuel. Ethanol is wonderful on turbo cars, as it has a higher octane rating and is less prone to knock than 91/93 pump gas. Bundle up and save big! Take full advantage of your Nostrum HPFP?s by pairing them with our Stage 2 injectors, the largest available on the market! Flowing 55% more fuel than the stock S55 injectors, our Stage 2 injectors allow for significant gains in peak horsepower, when properly tuned. Bundling the HPFP?s and injectors together turns the N55 into a monster of an engine! These products come complete with everything you need inside the box, including detailed installation instructions. Nostrum backs every part we sell with a limited lifetime warranty. Tuning guides are also available for your dealer or tuner. We have customer service and calibration engineers on staff to provide you with any support that you may need, from installation to tuning. Vehicle application list: 2011?2015 F30/F31 335i 2013?2016 F32/F33/F36 435i 2013?2016 F22/F23 M235i 2015?2016 F20/F21 M135i LCI 2012?2015 F20/F21 M135i 2016?2018 F87 M2 (Non-Competition) 2013-2017 F10/F11/F07 535i 2013-2017 F25/F26 X3/X4 35i 2014-2019 F15/F16 X5/X6 35i 2013-2018 F06/F12/F13 640i 2013-2015 F01 740i/Li Dyno graph sponsorship results: *Horsepower and Torque numbers are approximate and can vary significantly depending on numerous factors including what supporting upgrades are done to the vehicle, ambient temperature, elevation, road surface, tire selection & condition, fuel octane and quality, vehicle weight, and more. The advertised numbers herein are based on optimal conditions and utilizing proper supporting modifications. Your results may vary. Recommended tuners: Bend Calibration David Shoup Paul Johnson Tuning HCPerformance Tuning Cary Jordan What’s in the box: Big Bore HPFP – fully welded, stainless steel construction Accessories for full pump install provided ? including stainless steel high pressure line, low pressure line, flange and other accessories. Comprehensive installation and tuning guide Colored flange option Frequently ask question: Q: Why don’t I see horsepower gains with just a pump? A: Fundamentally we have to look at the entire fueling system and “where” in the rpm range the limits are. DI fuel systems in stock trim are often pump limited at middle rpm (peak torque) and injector limited at high rpm (peak power). This is due to engine speed. HPFPs are mechanically driven pumps (driven by the camshaft pump lobe spinning at ? crank speed) and are RPM (engine speed) dependent. Many of the quoted flow increases in the aftermarket are purely displacement based comparisons: where by example the big bore pump has a piston diameter X% larger than the “stock” pump or the swept displacement ((3.14*(radius)^2)*(stroke))of the pump Y% larger than the stock pump. The larger displacement of the pump really shines in low rpm, where the fuel injector has plenty of time (crank angle degrees) to inject fuel. As the engines starts to approach peak power the engine speed starts to become quite short and is limiting the injection duration (crank angle degrees) for the injection event (which is another reason why we like to increase fuel pressure up high!). Q: Can you make N54 injectors or pumps? A: Unfortunately the N54 di injector is a piezo-electric outwardly opening injector. This is a significantly different injector design than the very common solenoid activated multi-hole injector. We have tried in the past to work on these injectors but the crystals tend to crack, rendering the injector useless. So unfortunately we were not able to modify them or make a high performance replacement at this time.
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