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Injector Flow DataSpark Plugs Guide
S55 HPFP & LPFP Flow Rate Data
Note: HP figures are calculated using standard BSFC (Brake Specific Fuel Consumption) ratios, as such they may not represent the true maximum power the car can make for a given fuel.
BMW S55 LPFP Data
S55 LPFP Max WHP 93 OCT (98 RON)
| Pump Model | Max WHP on 93 OCT |
|---|---|
| Bosch (PN Unknown) ~300LPH @ 84psi (S55 Stock Unit) 13.5V & 14A | 720 |
| Walbro 450/460 304LPH (F90000267) @ 84psi 13.5V & 19A | 735 |
| Walbro 450/460 304LPH (F90000274) @ 84psi 13.5V & 19A | 735 |
| Walbro 525 390LPH (F90000285) @ 84psi 13.5V & 19A | 940 |
| Bosch BR540 365LPH (F02UV0U343-01) @ 84psi 13.5V & 19.5A | 880 |
S55 LPFP Max WHP E85
| Pump Model | Max WHP on E85 |
|---|---|
| Bosch (PN Unknown) ~300LPH @ 84psi (S55 Stock Unit) 13.5V & 18A | 600 |
| Walbro 450/460 304LPH (F90000267) @ 84psi 13.5V & 23.5A | 605 |
| Walbro 450/460 304LPH (F90000274) @ 84psi 13.5V & 23.5A | 605 |
| Walbro 525 390LPH (F90000285) @ 84psi 13.5V & 23A | 775 |
| Bosch BR540 365LPH (F02UV0U343-01) @ 84psi 13.5V & 24A | 725 |
S55 EKP Max Operating Parameters
| EKP Model | EKP Parameter |
|---|---|
| Stock (16147411596) (EKPM3) | 13.5V & 18A |
| BPM4 | 13.5V & 40A (Optionable to 50A) |
| ET3 Stage 1 | 13.5V & 22A |
| ET3 Stage 2 | 13.5V & 35A |
BMW S55 HPFP Data
Twin HPFP Configuration: The S55 uses two HPFPs (one per turbo bank). Each pump has 3 lobes, giving a combined 6 lobes total. All flow rates and HP figures below represent the combined output of both pumps.
S55 HPFP Max WHP (lowest to highest)
| Pump Model | Max WHP 93 OCT @7000 RPM | Max WHP E85 @7000 RPM |
|---|---|---|
| HDP5 (Stock) | 650 | 533 |
| HDP5 Evo | 689 | 565 |
| HDP6 (B58TU HPFP) | 850 | 696 |
| Dorch Stage 1 / LT1 / XDI S1 / Nostrum S1 | 937 | 768 |
| Spool FX150 | 970 | 795 |
| Dorch Stage 1.5 | 1028 | 843 |
| Spool FX170 | 1028 | 842 |
| Dorch Stage 2 / LT4 / XDI S2 / Nostrum S2 | 1123 | 921 |
| Spool FX180 | 1157 | 948 |
| Dorch Stage 2.5 | 1144 | 939 |
| Spool FX200 | 1329 | 1089 |
| Dorch Stage 3 | 1346 | 1104 |
| Spool FX400 | 1913 | 1568 |
Detailed HPFP Specifications
HDP5 (Stock)
Bore:
9.0mm
Stroke:
4mm
Lobes:
6
Max Volume:
1.527 CC/Rev
Delta Over Stock:
100%
Min Volumetric Efficiency:
85%
Max Rail Pressure:
20mPa / 2900PSI
Built-in Filter:
Yes
LPH @7000 RPM (85%):
273 LPH
LPH @3500 RPM (85%):
136 LPH
Max Flow @7000 RPM:
321 LPH
Max Flow @3500 RPM:
160 LPH
Max HP (93 OCT)
650 WHP
Max HP (E85)
533 WHP
HDP6 (B58TU HPFP)
Bore:
10.0mm
Stroke:
4mm
Lobes:
6
Max Volume:
1.885 CC/Rev
Delta Over Stock:
123%
Min Volumetric Efficiency:
90%
Max Rail Pressure:
35mPa / 5000PSI
Built-in Filter:
Yes
LPH @7000 RPM (85%):
356 LPH
LPH @3500 RPM (85%):
178 LPH
Max Flow @7000 RPM:
396 LPH
Max Flow @3500 RPM:
198 LPH
Max HP (93 OCT)
850 WHP
Max HP (E85)
696 WHP
Spool FX150
Bore:
11.0mm
Stroke:
4mm
Lobes:
6
Max Volume:
2.281 CC/Rev
Delta Over Stock:
149%
Min Volumetric Efficiency:
85%
Max Rail Pressure:
20mPa / 2900PSI
Built-in Filter:
No
LPH @7000 RPM (85%):
407 LPH
LPH @3500 RPM (85%):
204 LPH
Max Flow @7000 RPM:
479 LPH
Max Flow @3500 RPM:
239 LPH
Max HP (93 OCT)
970 WHP
Max HP (E85)
795 WHP
Spool FX170
Bore:
11.0mm
Stroke:
4mm
Lobes:
6
Max Volume:
2.281 CC/Rev
Delta Over Stock:
149%
Min Volumetric Efficiency:
90%
Max Rail Pressure:
25mPa / 3600PSI
Built-in Filter:
No
LPH @7000 RPM (85%):
431 LPH
LPH @3500 RPM (85%):
216 LPH
Max Flow @7000 RPM:
479 LPH
Max Flow @3500 RPM:
239 LPH
Max HP (93 OCT)
1028 WHP
Max HP (E85)
842 WHP
Spool FX180
Bore:
12.0mm
Stroke:
4mm
Lobes:
6
Max Volume:
2.714 CC/Rev
Delta Over Stock:
178%
Min Volumetric Efficiency:
85%
Max Rail Pressure:
25mPa / 3600PSI
Built-in Filter:
No
LPH @7000 RPM (85%):
485 LPH
LPH @3500 RPM (85%):
242 LPH
Max Flow @7000 RPM:
570 LPH
Max Flow @3500 RPM:
285 LPH
Max HP (93 OCT)
1157 WHP
Max HP (E85)
948 WHP
Spool FX200
Bore:
12.5mm
Stroke:
4mm
Lobes:
6
Max Volume:
2.945 CC/Rev
Delta Over Stock:
193%
Min Volumetric Efficiency:
90%
Max Rail Pressure:
25mPa / 3600PSI
Built-in Filter:
No
LPH @7000 RPM (85%):
557 LPH
LPH @3500 RPM (85%):
278 LPH
Max Flow @7000 RPM:
619 LPH
Max Flow @3500 RPM:
309 LPH
Max HP (93 OCT)
1329 WHP
Max HP (E85)
1089 WHP
HDP5 Evo
Bore:
9.0mm
Stroke:
4mm
Lobes:
6
Max Volume:
1.527 CC/Rev
Delta Over Stock:
100%
Min Volumetric Efficiency:
90%
Max Rail Pressure:
20mPa / 2900PSI
Built-in Filter:
Yes
LPH @7000 RPM (85%):
289 LPH
LPH @3500 RPM (85%):
145 LPH
Max Flow @7000 RPM:
321 LPH
Max Flow @3500 RPM:
161 LPH
Max HP (93 OCT)
689 WHP
Max HP (E85)
565 WHP
Dorch Stage 1 / LT1 / XDI S1 / Nostrum S1
Bore:
10.5mm
Stroke:
4mm
Lobes:
6
Max Volume:
2.078 CC/Rev
Delta Over Stock:
136%
Min Volumetric Efficiency:
90%
Max Rail Pressure:
25mPa / 3600PSI
Built-in Filter:
No
LPH @7000 RPM (85%):
393 LPH
LPH @3500 RPM (85%):
197 LPH
Max Flow @7000 RPM:
436 LPH
Max Flow @3500 RPM:
218 LPH
Max HP (93 OCT)
937 WHP
Max HP (E85)
768 WHP
Dorch Stage 1.5
Bore:
11.0mm
Stroke:
4mm
Lobes:
6
Max Volume:
2.281 CC/Rev
Delta Over Stock:
149%
Min Volumetric Efficiency:
90%
Max Rail Pressure:
25mPa / 3600PSI
Built-in Filter:
No
LPH @7000 RPM (85%):
431 LPH
LPH @3500 RPM (85%):
216 LPH
Max Flow @7000 RPM:
479 LPH
Max Flow @3500 RPM:
240 LPH
Max HP (93 OCT)
1028 WHP
Max HP (E85)
843 WHP
Dorch Stage 2 / LT4 / XDI S2 / Nostrum S2
Bore:
11.5mm
Stroke:
4mm
Lobes:
6
Max Volume:
2.493 CC/Rev
Delta Over Stock:
163%
Min Volumetric Efficiency:
90%
Max Rail Pressure:
25mPa / 3600PSI
Built-in Filter:
No
LPH @7000 RPM (85%):
471 LPH
LPH @3500 RPM (85%):
236 LPH
Max Flow @7000 RPM:
523 LPH
Max Flow @3500 RPM:
262 LPH
Max HP (93 OCT)
1123 WHP
Max HP (E85)
921 WHP
Dorch Stage 2.5
Bore:
12.0mm
Stroke:
4mm
Lobes:
6
Max Volume:
2.714 CC/Rev
Delta Over Stock:
178%
Min Volumetric Efficiency:
90%
Max Rail Pressure:
35mPa / 5000PSI
Built-in Filter:
No
LPH @7000 RPM (85%):
513 LPH
LPH @3500 RPM (85%):
257 LPH
Max Flow @7000 RPM:
570 LPH
Max Flow @3500 RPM:
285 LPH
Max HP (93 OCT)
1144 WHP
Max HP (E85)
939 WHP
Dorch Stage 3
Bore:
12.65mm
Stroke:
4mm
Lobes:
6
Max Volume:
3.016 CC/Rev
Delta Over Stock:
198%
Min Volumetric Efficiency:
90%
Max Rail Pressure:
35mPa / 5000PSI
Built-in Filter:
No
LPH @7000 RPM (85%):
570 LPH
LPH @3500 RPM (85%):
285 LPH
Max Flow @7000 RPM:
633 LPH
Max Flow @3500 RPM:
317 LPH
Max HP (93 OCT)
1346 WHP
Max HP (E85)
1104 WHP
Spool FX400
Bore:
15.0mm
Stroke:
4mm
Lobes:
6
Max Volume:
4.241 CC/Rev
Delta Over Stock:
278%
Min Volumetric Efficiency:
90%
Max Rail Pressure:
25mPa / 3600PSI
Built-in Filter:
No
LPH @7000 RPM (85%):
802 LPH
LPH @3500 RPM (85%):
401 LPH
Max Flow @7000 RPM:
891 LPH
Max Flow @3500 RPM:
446 LPH
Max HP (93 OCT)
1913 WHP
Max HP (E85)
1568 WHP