A fuel surge tank system can give you added fuel capacity without too much
modification to your existing stock fuel system. You can keep your
stock fuel pump or upgrade to a large in-tank fuel pump.
The external fuel pump is your upgrade fuel pump. The external fuel
pump can either be mounted inside the surge tank or mounted outside by
itself; if you mount your upgrade fuel pump into the surge tank, make sure
you adjust surge tank capacity accordingly.
The surge tank can be made from a variety of materials, but an aluminum tube with
welded aluminum end caps is popular. Surge tank fittings are weld-on
(aluminum) AN fittings. All lines should be fuel-approved AN stainless
steel braided lines. Note locations of the lines where they connect to
the surge tank; it is very important that the fittings are either on the top or
bottom of the surge tank.
If you're using the vehicle for racing, please note race sanction rules on fuel
system components mounted inside the vehicle if you're planning to mount and of
this inside the hatch area. Most race sanctions ban fuel components inside
the interior or at least require a sealed baffle.
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