ScienceofSpeed High Flow Fuel Surge Tank

The ScienceofSpeed High Flow Surge Tank System was designed to solve two problems: high horsepower fuel demand requiring one or more pumps and fuel starvation caused during high G acceleration and cornering. The system was designed and tested through a full year long race season in ScienceofSpeed's top finishing Unlimited S2000.

big power requires big fuel demand:

"Dual pump hangers" in the factory fuel tank do not solve fuel starvation problems during high G acceleration and cornering. The ScienceofSpeed High Flow Surge Tank solves both big fuel demands and fuel starvation issues. It's also perfectly suitable to a factory powered race car with an inexpensive single pump configuration.

fuel starvation:

The factory fuel tank is not designed for high lateral G force caused during cornering, especially with race compound tires. It is a common problem found on the S2000 caused especially during left-hand corners where the fuel pump's pick up point, even with more than a half tank of fuel, can run dry, causing the fuel system to aerate and lose pressure. This has lead to engine damage caused by lean fuel conditions.

The ScienceofSpeed fuel surge tank can supply 30-60 seconds of fuel to the engine, even with complete loss of fuel flow from the fuel tank. The system works by utilizing the in-tank pump to supply fuel to a reservoir surge tank. This surge tank contains one or two pumps (depending on power requirements) which then supplies fuel to the engine. The surge tank operates independently of the fuel tank such that a buffer of fuel is available to the engine should the tank pick up run dry.

advanced design:

• Full CNC machined billet aluminum construction eliminates possible weld failures.
• Feed design requires less than 3/8" of fuel level left in the tank - allowing 30-60 seconds of surge protection, even if the fuel tank is completely dry.
• Single or dual pump configuration available.
• All finishes, wire & seals are gasoline/ethanol compatible.
• Elastomer pump mounting design reduces vibration / noise found in other designs.
• Lightweight aluminum design (approximately 3 lbs) with weight saving pocketing.

pump configurations:

Two or three pumps are utilized. One in the factory fuel tank, and one or two in the surge tank. See the options list for pump details.

• Fuel surge tank with top, bottom, and body including hardware & ethanol compliant seals.
• AN fittings & plugs including ethanol compliant seals.
• Fuel pump mounting bracket including vibration resisting bushings & hardware.
• Hermetically sealed bulkhead connector (ethanol compliant mil-spec 14 ga wire) includes external female & male connector set.

The ScienceofSpeed Fuel Surge Tank is a universal design for nearly any vehicle. S2000 specific accessories are sold individually so that our customers may use their own accessories or accessories designed by ScienceofSpeed.

• Fuel pump(s). The surge tank can be configured with one or two pumps, depending on your needs. The in-tank pump feeds fuel to the surge tank at less than 10 PSI allowing this pump to operate at peak efficiency. The surge tank pump(s) operate at fuel rail pressure. The following are recommendations based on estimated fuel flow calculations. Your requirements may vary and should be verified against your system's requirements. The pump installed in the factory fuel tank is a different style than the pump installed into the surge tank. NOTE: An upgraded fuel pressure regulator is required when using fuel pumps with a flow rate of 320 LPH or higher.
  
  Fuel pump combinations: These recommendations are made as a general guide. The ScienceofSpeed Surge Tank is designed for up to 300 LPH of fuel flow (approximately 800 BHP with gasoline or 550 BHP with E85) when used with the fuel pump combinations as described below. The surge tank uses center-inlet fuel pumps, and are different than the in-tank pump used in the factory S2000 fuel tank.
  

  horsepower limit	fuel flow	factory in-tank pump	surge tank pump	minimum injector size (at 100% duty)
  240 (gasoline)	76 LPH	factory	Walbro 190 LPH	317 cc/min
  425 (gasoline)	147 LPH	factory	Walbro 255 LPH	612 cc/min
  600 (gasoline)	232 LPH	Walbro 255 LPH	Walbro 255 LPH	966 cc/min
  700 (gasoline)	263 LPH	AEM 320 LPH	AEM 320 LPH	1096 cc/min
  800 (gasoline)	300 LPH	AEM 320 LPH	2 x AEM 320 LPH	1250 cc/min
  450 (FlexFuel)	232 LPH	AEM 320 LPH (E85)	AEM 320 LPH (E85)	967 cc/min
  550 (FlexFuel)	300 LPH	AEM 320 LPH (E85)	2 x AEM 320 LPH (E85)	1250 cc/min

  
  
  
• Mounting bracket. 
  

  Installations requiring removal of factory emissions control module is for offroad race use only, and should never be used on a vehicle regulated by emissions controls.

  2000-05 bracket: this bracket allows the surge tank to be mounted in place of the factory emissions control module in rear of car. No drilling required, uses factory mounting holes. Bracket also allows universal placement on any flat surface. Includes high strength band clamps & hardware.

  2006-09 bracket: this bracket allows the surge tank to be mounted in place of the factory emissions control module in rear of car. No drilling required, uses factory mounting holes. Use universal bracket if another location is desired. Includes high strength band clamps & hardware.

  
  
• Electrical installation kit. 

  Single fuel pump wiring kit: used if only a single fuel pump surge tank will be installed and the factory in-tank wiring does not need to be upgraded (for using 255 LPH or smaller in-tank fuel pumps).

  Multi-fuel pump wiring kit: used for either single or dual fuel pump surge tanks where the factory in-tank pump wiring will also be upgraded.

  
  
• Fuel pump plumbing kit: Complete plug-and-play fuel plumbing kits. Includes all fittings, hoses, and accessories required for making the fuel surge tank plug-and-play on the S2000.
  
  Single pump: includes four AN6 custom hose assemblies (fuel tank feed, fuel surge tank feed, fuel surge tank return, and fuel tank return), four SAE quick-disconnect adapter fittings, mounting clamp for factory feed hose, and breather filter for fuel tank. Includes high quality lightweight aluminum hose fittings and stainless braided E85 compliant PTFE hose. Mounting placement requires replacement of factory emissions control module - this kit is for off-road race use only, not designed for emissions controlled vehicles.
  
  Dual pump: new tray completely replaces factory fuel tube tray with CNC laser cut assembly. Upgrades factory engine feed hose from 5/16" to 1/2" including lightweight AN8 E85 compliant PTFE / stainless steel braid reinforced feed hose & fittings. Upgrades factory return hose and fuel tank return hose from 1/4" to 3/8" including fluroelastomer E85 compliant return hoses & fittings. System requires high flow fuel rail & fuel pressure regulator with AN-8 ORB feed and fuel pressure regulator with AN-6 ORB outlet port in factory position (AEM fuel rail & fuel pressure regulator recommended). Mounting placement requires replacement of factory emissions control module - this kit is for off-road race use only, not designed for emissions controlled vehicles. NOTE: 2006-09: return fuel system conversion kit required.
  
  
• Return fuel system conversion: required for 2006-09 only.