Frequently Asked Questions - Surge Tank FAQ's

There are 2 common instances when a surge tank is a good option for your fuel system…

  1. When your car will be experiencing extreme G-forces when at the track, a surge tank supplies a “reserve” supply of fuel to avoid fuel starvation.  Most vehicles that drag race, road race and drift are all good candidates for a surge tank. 
  2. When you need to add additional fuel and do not want to replace the OE fuel tank or in-tank pump a surge tank can provide a very flexible and easy to install auxiliary fuel supply.
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The 2.5L pump with one pump holds 2.31L and holds 2.13L with two pumps. The 3.5L with one pump holds 3.25L and holds 2.98L with two pumps.  Check out our surge tank tech page for more information.

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To minimize price and maximize flexibility, the DW Modular Surge Tanks do not include fittings.

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The surge tank is not designed to hold more than 15psi of pressure.  A vent line from the surge tank to the OE fuel tank should always be utilized per install instructions.  If the surge tank is pressurized, it will not perform properly and may leak.

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A surge tank can be a great alternative to a fuel cell.  Be sure to check with your racing regulations. 

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The best places to mount a surge tank vary with the application.  Popular mounting locations are trunk and frame rail.  Be sure to carefully consider safety when choosing an installation location.  A location should be selected that is protected from physical damage, is easy to access, and will not be exposed to extreme heat.

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Engine compartment is not a good location for sure tank installation.  Fuel reservoirs should not be located in close proximity to ignition sources.  In addition, elevated engine bay temperatures can heat up the fuel in the surge tank which can cause engine detonation and shortened fuel pump lifespan.

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A surge tank is often easier to install and less expensive than a multiple pump hanger.  In addition, the surge tank will eliminate fuel slosh and low tank pick up issues.

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Since the surge tank feeder pumps (in-tank) will be operating at essentially 0 psi, high power pumps are not needed.  Often the OE pump is all that is required.  The size of the feeder pump required will be dependent on the part number and quantity of in-line pump installed.  The DW Modular Surge Tank Tech sheets found on the website provide popular combinations for a given power level.

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