Dorch Lift Kit – HPFP Upgrade – EWG BMW 135i/335i/X1 N55
We are proud to offer a game-changing product for the N55 community! With this innovative solution we are able to add up to 49% MORE fuel flow on top of either one of our existing N55 kits. This means higher power capacity than ever before possible with the OEM direct-injection fuel system. 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 safety and sophistication of the stock DME.
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|
This fuel flow equates to never before seen DI power numbers! When combined with larger injectors and our Stage 1 pump, this product will support 750whp on E10 and 600whp on E85. When combined with larger injectors and our Stage 2 pump, this product will support 900whp on E10 and 750whp on E85.
Software changes are required to run this upgrade, but we do have preset optimized maps available via Bootmod3 and MHD (coming soon). Simply check the box for the appropriate “Lift Kit” upgrade when flashing.
NOTE: When pushing much beyond the flow capacity of our existing Stage 2 HPFP kit, the N55 is very much limited by the injectors. In order to see the full potential of this upgrade, it is highly recommended to upgrade to the larger S63 EU5 Injectors.
- Dorch Lifetime Warranty
- Dorch Vacuum Pump Assembly
- Dorch HPFP Mounting Flange
- Vacuum Pump Sealing Cap
- Vacuum Pump Gasket
BMW 1-SERIE E81/E82/E87/E88 135I
BMW 1-SERIE E81/E82/E87/E88 1M COUPE
BMW 3-SERIE E90/E91/E92/E93 335I
BMW 1-Serie F20/F21 135i
BMW 2-Serie F22/F23 235i
BMW 2-Serie F22/F23 M2
BMW 3-Serie E90/E91/E92/E93 335I
BMW 3-Serie F30/F31/F34 335i
BMW 4-Serie F32/F33/F36 435i
BMW X4 F26 M40i
BMW X5 F15 50i
BMW X6 F16 50i