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N55 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.

N55 HPFP Variants

  • Early N55: Uses the same/similar HPFP as the N54, which was known for reliability issues
  • Later N55: Uses a more reliable vacuum pump driven Bosch HPFP with improved durability

The later Bosch HPFP is generally considered more reliable for both stock and modified applications.

BMW N55 LPFP Data

N55 LPFP Max WHP 93 OCT (98 RON)

Pump ModelMax WHP on 93 OCT
Bosch (0 580 454 100) 200LPH @ 84psi (Stock Unit 13.5V & 13A)450
Walbro 450/460 304LPH (F90000267) @ 84psi 13.5V & 19A735
Walbro 450/460 304LPH (F90000274) @ 84psi 13.5V & 19A735
Walbro 525 390LPH (F90000285) @ 84psi 13.5V & 19A940
Bosch BR540 365LPH (F02UV0U343-01) @ 84psi 13.5V & 19.5A880

N55 LPFP Max WHP E85

Pump ModelMax WHP on E85
Bosch (0 580 454 100) 200LPH @ 84psi (Stock Unit 13.5V & 17A)400
Walbro 450/460 304LPH (F90000267) @ 84psi 13.5V & 23.5A605
Walbro 450/460 304LPH (F90000274) @ 84psi 13.5V & 23.5A605
Walbro 525 390LPH (F90000285) @ 84psi 13.5V & 23A775
Bosch BR540 365LPH (F02UV0U343-01) @ 84psi 13.5V & 24A725

N55 EKP Max Operating Parameters

EKP ModelEKP Parameter
Stock (16147411596) (EKPM3)13.5V & 18A
BPM413.5V & 40A (Optionable to 50A)
ET3 Stage 113.5V & 22A
ET3 Stage 213.5V & 35A

BMW N55 HPFP Data

N55 HPFP Max WHP (lowest to highest)

Pump ModelMax WHP 93 OCT @7000 RPMMax WHP E85 @7000 RPM
Helix500400
HDP5 (Stock)511409
HDP5 EVO (B4x/B58 HPFP)403329
HDP6 (B58/48TU HPFP)500410
Dorch Stage 1 / LT1 / Nostrum LT1519426
Spool FX150570467
Dorch Stage 1.5604495
Spool FX170604495
Dorch Stage 2 / LT4 / Nostrum LT4658540
Dorch Stage 2.5670550
Spool FX180680557
Spool FX200781640
Dorch Stage 3788647
Spool FX4001022844

Detailed HPFP Specifications

HDP5 (Stock)

Bore:
9.0mm
Stroke:
4.7mm
Lobes:
3
Max Volume:
0.897 CC/Rev
Delta Over Stock:
100%
Min Volumetric Efficiency:
85%
Max Rail Pressure:
20mPa / 2900PSI
Built-in Filter:
Yes
LPH @7000 RPM (85%):
160 LPH
LPH @3500 RPM (85%):
80 LPH
Max Flow @7000 RPM:
188 LPH
Max Flow @3500 RPM:
94 LPH
Max HP (93 OCT)
511 WHP
Max HP (E85)
409 WHP

HDP6 (B58/48TU HPFP)

Bore:
9.0mm
Stroke:
4.7mm
Lobes:
3
Max Volume:
1.108 CC/Rev
Delta Over Stock:
124%
Min Volumetric Efficiency:
90%
Max Rail Pressure:
35mPa / 5000PSI
Built-in Filter:
Yes
LPH @7000 RPM (85%):
210 LPH
LPH @3500 RPM (85%):
104 LPH
Max Flow @7000 RPM:
233 LPH
Max Flow @3500 RPM:
117 LPH
Max HP (93 OCT)
500 WHP
Max HP (E85)
410 WHP

Dorch Stage 1 / LT1 / Nostrum LT1

Bore:
10.5mm
Stroke:
4.7mm
Lobes:
3
Max Volume:
1.220 CC/Rev
Delta Over Stock:
136%
Min Volumetric Efficiency:
85%
Max Rail Pressure:
20mPa / 2900PSI
Built-in Filter:
No
LPH @7000 RPM (85%):
218 LPH
LPH @3500 RPM (85%):
109 LPH
Max Flow @7000 RPM:
257 LPH
Max Flow @3500 RPM:
128 LPH
Max HP (93 OCT)
519 WHP
Max HP (E85)
426 WHP

Dorch Stage 1.5

Bore:
11.0mm
Stroke:
4.7mm
Lobes:
3
Max Volume:
1.340 CC/Rev
Delta Over Stock:
149%
Min Volumetric Efficiency:
90%
Max Rail Pressure:
25mPa / 3600PSI
Built-in Filter:
No
LPH @7000 RPM (85%):
254 LPH
LPH @3500 RPM (85%):
127 LPH
Max Flow @7000 RPM:
281 LPH
Max Flow @3500 RPM:
141 LPH
Max HP (93 OCT)
604 WHP
Max HP (E85)
495 WHP

Dorch Stage 2 / LT4 / Nostrum LT4

Bore:
11.5mm
Stroke:
4.7mm
Lobes:
3
Max Volume:
1.464 CC/Rev
Delta Over Stock:
163%
Min Volumetric Efficiency:
85%
Max Rail Pressure:
25mPa / 3600PSI
Built-in Filter:
No
LPH @7000 RPM (85%):
276 LPH
LPH @3500 RPM (85%):
138 LPH
Max Flow @7000 RPM:
308 LPH
Max Flow @3500 RPM:
154 LPH
Max HP (93 OCT)
658 WHP
Max HP (E85)
540 WHP

Dorch Stage 2.5

Bore:
12.0mm
Stroke:
4.7mm
Lobes:
3
Max Volume:
1.595 CC/Rev
Delta Over Stock:
178%
Min Volumetric Efficiency:
90%
Max Rail Pressure:
35mPa / 5000PSI
Built-in Filter:
No
LPH @7000 RPM (85%):
301 LPH
LPH @3500 RPM (85%):
151 LPH
Max Flow @7000 RPM:
335 LPH
Max Flow @3500 RPM:
167 LPH
Max HP (93 OCT)
670 WHP
Max HP (E85)
550 WHP

Dorch Stage 3

Bore:
12.65mm
Stroke:
4.7mm
Lobes:
3
Max Volume:
1.772 CC/Rev
Delta Over Stock:
198%
Min Volumetric Efficiency:
90%
Max Rail Pressure:
35mPa / 5000PSI
Built-in Filter:
No
LPH @7000 RPM (85%):
335 LPH
LPH @3500 RPM (85%):
167 LPH
Max Flow @7000 RPM:
372 LPH
Max Flow @3500 RPM:
186 LPH
Max HP (93 OCT)
788 WHP
Max HP (E85)
647 WHP

Spool FX150

Bore:
11mm
Stroke:
4.7mm
Lobes:
3
Max Volume:
1.340 CC/Rev
Delta Over Stock:
149%
Min Volumetric Efficiency:
85%
Max Rail Pressure:
20mPa / 2900PSI
Built-in Filter:
No
LPH @7000 RPM (85%):
239 LPH
LPH @3500 RPM (85%):
120 LPH
Max Flow @7000 RPM:
281 LPH
Max Flow @3500 RPM:
141 LPH
Max HP (93 OCT)
570 WHP
Max HP (E85)
467 WHP

Spool FX170

Bore:
11mm
Stroke:
4.7mm
Lobes:
3
Max Volume:
1.340 CC/Rev
Delta Over Stock:
149%
Min Volumetric Efficiency:
90%
Max Rail Pressure:
25mPa / 3600PSI
Built-in Filter:
No
LPH @7000 RPM (85%):
254 LPH
LPH @3500 RPM (85%):
127 LPH
Max Flow @7000 RPM:
281 LPH
Max Flow @3500 RPM:
141 LPH
Max HP (93 OCT)
604 WHP
Max HP (E85)
495 WHP

Spool FX180

Bore:
12.0mm
Stroke:
4.7mm
Lobes:
3
Max Volume:
1.595 CC/Rev
Delta Over Stock:
178%
Min Volumetric Efficiency:
85%
Max Rail Pressure:
25mPa / 3600PSI
Built-in Filter:
No
LPH @7000 RPM (85%):
285 LPH
LPH @3500 RPM (85%):
142 LPH
Max Flow @7000 RPM:
335 LPH
Max Flow @3500 RPM:
168 LPH
Max HP (93 OCT)
680 WHP
Max HP (E85)
557 WHP

Spool FX200

Bore:
12.5mm
Stroke:
4.7mm
Lobes:
3
Max Volume:
1.731 CC/Rev
Delta Over Stock:
193%
Min Volumetric Efficiency:
90%
Max Rail Pressure:
25mPa / 3600PSI
Built-in Filter:
No
LPH @7000 RPM (85%):
327 LPH
LPH @3500 RPM (85%):
164 LPH
Max Flow @7000 RPM:
364 LPH
Max Flow @3500 RPM:
182 LPH
Max HP (93 OCT)
781 WHP
Max HP (E85)
640 WHP

Spool FX400

Bore:
13.5mm
Stroke:
4.7mm
Lobes:
3
Max Volume:
2.018 CC/Rev
Delta Over Stock:
225%
Min Volumetric Efficiency:
90%
Max Rail Pressure:
25mPa / 3600PSI
Built-in Filter:
No
LPH @7000 RPM (85%):
381 LPH
LPH @3500 RPM (85%):
191 LPH
Max Flow @7000 RPM:
424 LPH
Max Flow @3500 RPM:
212 LPH
Max HP (93 OCT)
1022 WHP
Max HP (E85)
844 WHP
Injector Flow DataSpark Plugs Guide