Fuel damper on aftermarket fuel rail

[aklackner]

https://www.hybrid-racing.com/collectio ... -universal

I’ve been interested in fuel rail options for a number of reasons but felt lack of a damper would negatively affect stability since fuel pumps create pulsating pressure levels. Just saw this today and pretty impressed a solution exists. It would allow relocation of the damper and eliminating the restrictive banjo fittings.

[coolhandluke]

Forgive my ignorance, but what problem are we trying to solve?

[aklackner]

Fuel pumps create a pulsing pressure. This frequency is slower than injectors open and close which leads to inconsistent fueling in the cylinders.

To resolve this most OEMs, including Honda, add a damper, on the fuel rail smoothing out the fuel pressure in the rail.

The OEM fueling system also has a number of banjo bolts which act as choke points if you want to eliminate these, run an inline fuel filter, or otherwise replace your fuel rail you’ll typically lose this damper and subject fueling to pressure waves from the fuel pump.

The adapters allow you to eliminate the OEM banjo fittings, run an aftermarket fuel rail and still retain the OEM damper to manage a more stable pressure in the rail.