The Walbro F90000262 400LPH pump is the highest flowing in-tank fuel pump on the market. Walbro designed the pump to meet the requirements of modern forced induction applications where a single 255LPH fuel pump is insufficient. The pump uses a turbine style design which incorporates two composite plastic blades, just like our HFP 255LPH pumps, as well as the Aeromotive 340LPH pump introduced last year. The turbine design lends itself to extremely quiet operation, especially compared to Walbro's previous "gerator" pump design that had metal gears which were notorious for a very loud whining noise which could easily be heard over even the loudest aftermarket exhaust setups.
The Walbro 400LPH pump can flow anywhere from 0-100psi (the bypass valve is set higher than Walbro's previous fuel pumps, which were around 85psi). Final fuel pressure is determined by your fuel pressure regulator. Please note that this is an aftermarket fuel pump, and some modifications may be required to get it to fit. The overall size is very similar to Walbro's previous generation GSS340/GSS341/GSS342, however the base is slightly enlarged as shown in the pictures.
Horsepower capabilities? No other in-tank pump on the market can come close. This pump can support over 800hp using larger than stock fuel lines. This pump can still support significantly more power than a Walbro 255LPH pump even when using stock fuel lines. Due to the higher amperage draw of this pump, a hotwire kit should be used. An aftermarket Fuel Pressure Regulator (FPR) is also highly recommended.
NOTE: This pump is only intended for extreme HP applications and will need at least a -8 AN return style fuel system. Also you will have to modify the sending unit for this to fit, dimensions below.
Total length: 5.1" Pump casing length: 3.5" Overall diameter at the bottom of the hat: 1.975"