




A fuel surge tank (FST) is designed to prevent starvation to the engine on vehicles with inadequate fuel tank baffling. The surge tank also provides a quick and easy way to upgade any standard fuel system without the need to modify the stock fuel tank or pump. It is also an excellent fueling solution for vehicles installing large fuel demand power upgrades such as forced induction.
HOW A FST WORKS
The volume of fuel inside the surge tank acts as a buffer to always keep the FST pump supplied with fuel. This volume is maintained by the main fuel tank's pump as well as the fuel returning from the fuel pressure regulator. Excess fuel in the surge tank is returned back to the vehicle's main fuel tank.
PLUMBING
All adapter fittings on top of the FST are 6AN (9/16"-18) male.
NOTES:
ELECTRICAL
The stainless electrical studs easily handle the high current demand that compact multi-pin bulkhead connectors lack. These serviceable connections are hermetically sealed and impervious to all standard and exotic fuels. Non conductive anodized aluminum acorn nuts are provided to prevent any accidental short circuiting. Electrical hardware is included for the fuel pump. Furthermore, the in-tank wiring is insulated with high quality chemically resistant ETFE. Relay kits, such as 17-0031, are recommended to drive these new internal fuel pump.
PUMP COMPATIBILITY (Pumps Sold Separately)
*Sock filters are provided in this kit for these pumps.
**Sock filters are included from the fuel pump manufacture.
FST Kit Includes:
MOUNTING OPTIONS (Sold Separately)
The fuel surge tank can be installed almost anywhere in the vehicle. However, mounting near collision prone areas, heat sources, or moving parts such as suspension components should be avoided. NOTE: The FST can be mounted anywhere from vertical to horizontal. Choose a bracket that best fits the application.
LEVEL SWITCH OPTIONS (Sold Separately)
20-0461 Fuel Level Switch, 1/8 NPT
The fuel surge tank comes standard with a 2AN ORB plug in the "level switch" port, as shown below. When the plug is unscrewed, this 1/8" NPT fuel level switch can be installed from underneath. When fuel level in the FST drops by 20% or more, a switched signal can be sent to a unit such as a dashboard mounted indicator or programmable ECU input for safety purposes.
20-0519 Fuel Level Switch Plus Diagnostic Indicator
If the 20-0519 Fuel Level Switch Plus Diagnostic Indicator can be used as a visual reference for fuel level. When the fuel level switch is triggered, the signal is sent directly to the LED. While often not practical to be viewed while driving, the indicator can be used for diagnosing a potential fueling issue.
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