What is a brushless fuel pump — and why it matters
Brushless fuel pumps employ a brushless DC (BLDC) motor and electronic commutation instead of a mechanical brush/commutator. That architecture reduces wear, heat and electrical arcing inside the tank, resulting in better longevity and reliability compared with older brushed designs — a key advantage for in-tank modules in modern vehicles. See the SAE technical work on brushless in-tank pump designs for engineering background.
(SAE: Brushless Motors for In-Tank Fuel Pumps).
255 LPH vs 340 LPH @ 3 bar — which fits your project?
255 LPH @ 3 bar — ideal for street performance and mildly tuned engines where quiet operation, moderate current draw and long life are priorities.
340 LPH @ 3 bar — targeted at turbocharged or heavily modified engines that require higher sustained fuel volume, especially under boost and transient loads. Market examples of 340 LPH in-tank pumps show they support high-hp EFI systems while fitting many OE mounting points.
(Holley: 340 LPH product).
Quick comparison table
| Model | Flow | Nominal Pressure | Best for |
|---|---|---|---|
| KL-WS3801-255 | 255 LPH | 3 bar | Street performance, mild tune |
| KL-WS3801-340 | 340 LPH | 3 bar | Turbo/high-hp builds, aggressive tunes |
How to size a pump — practical guidance
Sizing must account for target horsepower, fuel type (gasoline vs E85), regulator pressure and head losses in lines/filters. Industry buying/sizing guides and retailer spec pages provide practical tables that convert target HP into LPH requirements — use them as a baseline and add a safety margin for peak conditions. For a clear market reference and part availability check, see Summit Racing’s product/spec pages for 340 LPH pumps.
(Summit Racing: pump sizing & reference).
Installation & system recommendations (best practices)
- In-tank orientation: Keep the inlet submerged; install anti-slosh baffles for track/racing use to avoid fuel pick-up loss.
- Wiring & voltage: Use correct gauge wiring and dedicated fuse/relay. Higher flow pumps may draw significant amperage — verify voltage under load (many specs assume 13.5 V).
- Fuel compatibility: Confirm E85 compatibility if required — some high-flow aftermarket pumps are explicitly E85-rated.
- System type: For returnless systems consult your EFI controller/ECU vendor; high flow can require regulator or plumbing changes.
For an OEM overview of fuel-supply modules and recommended design attributes, Bosch’s fuel-supply module references are useful to engineers and installers. (Bosch: Fuel-supply module overview).
Noise, NVH and reliability
Brushless designs and modern impeller/turbine geometries reduce motor noise and pressure pulsations. Manufacturers document turbine/impeller advances that minimize NVH while improving lifetime — see DENSO’s product overviews for details on turbine-type fuel pumps and noise reduction technology. (DENSO: fuel pump technology).
Technical Datasheets & Engineering Support
To ensure correct application and system compatibility, our detailed
brushless fuel pump datasheets (255 LPH & 340 LPH @ 3 bar)
are provided directly by our engineering team.
Please contact us to receive the latest technical documentation, including:
- Flow vs. pressure curves
- Electrical specifications & current draw
- Fuel compatibility (gasoline / E85)
- Installation guidelines and wiring diagrams
Fuel Pump Selection & Technical Consultation
Choosing the correct brushless fuel pump depends on engine output, fuel type,
and fuel system configuration. Our technical team supports OEM, distributors,
and performance workshops in selecting the right 255 LPH or 340 LPH @ 3 bar
solution.
When contacting us, please include the following details if available:
- Vehicle model and engine type
- Target horsepower or performance level
- Fuel type (gasoline or E85)
- Return or returnless fuel system
