Walbro 450 LPH (E85) In-Tank Fuel Pump & ScienceofSpeed Installation Kit


The Walbro 450 LPH fuel pump is a universal design and most vendors do not sell the required parts to install in to NSX. ScienceofSpeed includes with the fuel pump a complete NSX-specific installation kit allowing direct replacement of the factory fuel pump and step by step installation instructions from ScienceofSpeed.

This fuel pump for example can supply 350 LPH (or 972 cc/min per injector in the NSX engine) which is enough flow for approximately 870 BHP (gasoline) or 670 BHP (E85) based on fuel rail pressure at 60 PSI, fuel pump voltage at 13.5V, and BSFC at .60 (gasoline) or .78 (E85), and injectors at 80% duty cycle. This example is approximate, and should be verified based on the application's specific conditions. See fuel pump comparison graph.

Important note: For applications requiring more than 10 amps of current (see current requirements of this fuel pump below), the factory fuel pump wiring circuit must be upgraded. ScienceofSpeed offers a complete fuel pump power distribution kit shown below.

2000-05: requires factory 1991-99 NSX fuel pump carrier.

Walbro 450 LPH Fuel Pump (gasoline or E85) & ScienceofSpeed Installation Kit - NSX, 1991-99