S55 HPFP Flow Capacities
| Pump Model | Fuel Flow (cc/rev) | E85 Power Capacity (cc/rev) |
|---|---|---|
| HDP5 (Stock S55) | 1.527 | 600whp |
| HDP5 w/ Dorch Lift Kit | 2.100 | 800+whp* |
*At 800whp on E85 there is quite a bit of capacity left in our S55LK, but that’s the most that we can get out of the currently available upgraded injectors on the market.
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. These are readily available OEM BMW injectors proven to support 800whp on full E85.
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
S55 Dorch Engineering HPFP Lift Kit (on a core exchange basis)
N.B. ALL N55 & S55 Lift Kits require factory BMW OEM lift assemblies to be returned in a timely manner