N55 Stage 2 HPFP Upgrade - Dorch Engineering
Our Stage 2 kit is a bigger, better version of our Stage 1 kit for some of the more extreme applications. This is a complete plug-and-play kit to support 650whp and also allow for full E85 up to 500whp (these numbers can vary quite a bit depending on tuning strategy, fuel type, etc.). There’s no cutting, no bending, no crimping, etc. This kit drops right in with full control from the DME, just like the OEM pump. All of the safety and sophistication of the stock DME remain in place.
N55 HPFP Flow Capacities
The table below serves as a reference for maximum fuel flow in cubic centimeters per camshaft revolution for various N55 fuel pump options. These calculations are based on the stock N55 cam lobe unless otherwise noted (Lift Kit).| Pump Model | Fuel Flow (cc/rev) | Fuel Flow w/ Dorch Lift Kit (cc/rev) |
|---|---|---|
| HDP5 (Stock N55) | 0.837 | NOT COMPATIBLE |
| HDP5 Evo (Stock B58) | 0.897 | NOT COMPATIBLE |
| HDP6 (Stock B58TU) | 1.107 | NOT COMPATIBLE |
| Dorch Engineering Stage 1 | 1.221 | 1.818 |
| Dorch Engineering Stage 2 | 1.465 | 2.181 |
NOTE: When combined with our N55 Lift Kit, this pump is capable of 900whp on E10 and 750whp on E85!
Software changes are required to run this pump. If using MHD or Bootmod3, simply check the box for our pump upgrade when flashing. Otherwise, please send your .BIN file to tuning@dorchengineering.com for the appropriate software changes. This change is free of charge for all of our customers.
Kit Contents:
- Dorch Lifetime Warranty
- HPFP w/ Hardware
- High Pressure Line
- Low Pressure Line
- Low Pressure Line Bracket
- Plug-n-Play Adapter Harness
Kit Fitment:
F87 – M2
F20/21 – 135i, 135xi
F22/23 – 235i, 235xi
F30/31/34 – 335i, 335xi
F32/33/36 – 435i, 435xi
F10/11 – 535i, 535xi *
F25/26 – X3/X4 35i *
F15/16 – X5/X6 35i
E8X – 135i *
E9X – 335i *
E84 – X1 35i *
E70/71 – X5/X6 35i *
*ONLY 2013+ models with OE Bosch HPFP
KIT NOT COMPATIBLE with 2011-2012 N55 Vehicles
Installation Instructions:
Related products
Fuel Pressure Regulator | Forge
APR Low Pressure Fueling System - 2.0T
Bm3 Flexfuel Kit
Disclaimer
Any tuning/performance-based mods/work/quotes and products are strictly for off-road and motorsport use only. Performance mods/certain exhaust systems will cause your vehicle to fail the MOT emissions test, therefore rendering the vehicle unroadworthy and illegal to be used on UK roads. PLEASE BE AWARE – Sports cats can NOT legally be installed on a vehicle for use on a public road that was manufactured after 1st March 2001 unless Type ECE 103R is approved (identified by ‘103R’ in the exhaust product title). Fitting a Cat/Cat Bypass or GPF delete/bypass to a vehicle that is to be used on UK roads will cause the vehicle to fail the MOT emissions test, therefore rendering it unroadworthy and illegal to be used on UK roads.Please note that UK regulations specify that the nearside and offside front door windows, for which the driver uses for forward vision, and when using external rear facing mirrors, must permit a light transmittance value of at least 70% ( for motor vehicles first used on or after 1st April 1985), with the front windscreen permitting a light transmittance value of 75%
Please note that factory fitted windows are already tinted and by adding additional tinting, this may result in vehicles no longer being compliant for Road use. Read more
Contact Info
- Address: Wrench Ltd. Ashford Road, London, Middlesex TW15 1XB
- Phone: 0208 571 4466
- Parts Enquiry: sales@wrenchstudios.co.uk
- General Enquiry: info@wrenchstudios.co.uk
