This write-up should work for a wide range of Hondas and Acuras.
Why would we need to upgrade the pump? In the case of the older cars, you may just need to replace a failed pump otherwise, it’s a well known fact that in order to make more power, more fuel is required. Whether doing a naturally aspirated build, boosted, or even swapping to a larger engine, more fuel will be required. The easiest way to do this is to install a higher flow pump.
The idea of a higher flowing pump is not necessarily to increase fuel pressure. In fact, if all other components remain the same, the fuel pressure does not tend to rise with the addition of a new pump. As fuel demand increases, with higher rpms, the fuel pressure can drop but the flow increases. If the pump cannot support the required flow, the engine will run lean.
Before you start, disconnect the negative battery terminal. Relieve fuel pressure by loosening the 12mm bolt on top of the fuel filter under the hood.
I reused the stock vibration isolator (rubber ring on the bottom) and fuel sock. The new pieces that were included with my pump would not have worked in this bracket.
Installation is essentially the opposite of removal. Slide the pump back into the tank, fasten with six nuts, attach fuel lines and reconnect the harness.
I had installed a fuel pressure gauge prior to swapping the pump. Without making any other changes, my pressure increased from 35psi to 41psi at idle.
At this point, enjoy your new pump, or take the time to install an adjustable fuel pressure regulator.