S55 Lift Kit – HPFP Upgrade - Dorch Engineering
We are proud to offer a game-changing product for the S55 community! With this innovative solution we are able to push +38% more fuel flow out of the OEM HPFPs! We start with Genuine BMW vacuum pump cores and install our Dorch Engineering Cam within the OEM assembly using our proprietary manufacturing tooling and validation equipment. What you end up with is a ton more fuel flow in a very simple and clean package, all while utilizing the OEM HPFPs. Since the S55 engine uses some of the smallest fuel pump cams in the Bosch lineup, we are able to achieve this additional flow without sacrificing any of the longevity or reliability of the OEM pumps. There’s no cutting, no bending, no crimping, etc. This kit drops right in like factory and it does not require any special tuning to get up and running. All of the safety and sophistication of the stock DME remain in place. This is the ONLY HPFP upgrade available that will successfully pass emissions on OEM DME mapping!
S55 HPFP Flow Capacities
The table below serves as a reference for maximum fuel flow in cubic centimeters per camshaft revolution for various S55 fuel pump options.| Pump Model | Fuel Flow (cc/rev) |
|---|---|
| HDP5 (Stock S55) | 1.527 |
| HDP5 w/ Dorch Lift Kit | 2.100 |
| Dorch Stage 1 HPFP w/ Lift Kit | 2.857 |
Software changes are NOT required to run this upgrade. However, we do have preset optimized maps available via Bootmod3 and MHD. Simply check the box for our “Lift Kit” upgrade when flashing.
NOTE: The S55 fuel system is very much limited by the injectors. In order to see the true benefits of this kit, it is highly recommended to upgrade to the larger S63 EU5 Injectors.
Kit Contents:
- Dorch Lifetime Warranty
- Dorch Vacuum Pump Assembly
- Vacuum Pump Sealing Cap
- Vacuum Pump Gasket
Kit Fitment:
F80 M3 – All Variants
F82 M4 – All Variants
F87 M2 – Competition, CS ONLY
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
