Summit Racing Electric Fuel Pump: The Complete Installation and Performance Guide

If you're searching for a Summit Racing electric fuel pump, you're likely looking to upgrade your vehicle's fuel delivery system for better performance, reliability, or to replace a failing mechanical pump. Here's the bottom line: Summit Racing offers several high-quality electric fuel pump options, including the SUM-G3136-3 "Blue" pump and the SUM-G3136-17 "Black" pump, both of which are rotary vane type pumps designed for high-performance applications. Proper installation is critical, as these pumps must be mounted below the fuel tank, wired through a relay, and used with a fuel pressure regulator to ensure safe operation and prevent engine damage. In this guide, we'll walk you through everything you need to know about selecting, installing, and maintaining a Summit Racing electric fuel pump for your vehicle.

Understanding Summit Racing Electric Fuel Pumps

Summit Racing electric fuel pumps are designed as universal aftermarket replacements that work in a variety of vehicles, including classic cars, trucks, and performance vehicles. Unlike mechanical fuel pumps driven by the engine, these electric pumps use an integrated motor to push fuel from the tank to the engine at consistent pressure. This fundamental difference delivers several advantages: better fuel pressure regulation, reduced vapor lock susceptibility, and improved reliability, especially during cold starts or high-demand situations.

Key Features of Summit Racing Pumps:

  1. SUMMIT SUM-G3136-3 (Blue Pump): This high-pressure pump delivers 120 GPH free flow and 70 GPH at 7 PSI, with a preset pressure of 19 PSI. It is compatible with E85 fuel and supports up to 400 crankshaft horsepower on normally aspirated gasoline engines.

  2. SUMMIT SUM-G3136-17 (Black Pump): This higher volume pump provides 135 GPH free flow and 120 GPH at 7 PSI, with a preset pressure of 22 PSI. It supports up to 700 crankshaft horsepower and is also E85 compatible.

Important Warning: Neither pump is compatible with Methanol fuel. Running these pumps with Methanol will cause damage and void the warranty.

Both pumps feature 3/8" NPT inlet and outlet port threads. Summit recommends using 3/8" or larger fuel line with the Blue pump and 1/2" or larger fuel line with the Black pump to ensure adequate flow.

Why Upgrade to a Summit Racing Electric Fuel Pump

There are several compelling reasons to consider upgrading to an electric fuel pump from Summit Racing:

Consistent Fuel Pressure: Electric pumps provide steady, reliable fuel pressure regardless of engine RPM. This is especially important for high-performance engines that demand precise fuel delivery under load. Mechanical pumps can struggle to maintain pressure at high RPM, leading to fuel starvation and potential engine damage.

Reduced Vapor Lock: Electric pumps mounted near the fuel tank primarily push liquid fuel rather than pulling it, dramatically reducing vapor formation potential. This is particularly beneficial when dealing with modern ethanol-blended fuels, which have lower boiling points than traditional gasoline.

Improved Cold Starting: Electric pumps prime the fuel system immediately when the ignition is turned on, eliminating the need to crank the engine repeatedly to build pressure. This results in faster, more reliable starts in cold weather conditions.

Better Compatibility with Modern Fuels: Summit Racing pumps are designed to handle E85 and other alcohol-based fuels, provided all other fuel system components are also rated for these fuels.

Selecting the Right Summit Racing Electric Fuel Pump

Choosing the correct pump for your application requires understanding your engine's specific needs. Here are the critical factors to consider:

Flow Rate Requirements: Calculate based on engine horsepower. A rough estimate is Engine HP × 0.5 lb/hr ÷ 6 to determine required gallons per hour. Underestimating demand leads to fuel starvation, while overestimating wastes energy and risks overheating. The Blue pump supports up to 400 horsepower, while the Black pump handles up to 700 horsepower on normally aspirated gasoline engines.

Pressure Specifications: Match the pump to your carburetor or injection system requirements. Most carbureted engines require 5-9 PSI, while fuel injection systems typically need 40-70 PSI. Summit Racing pumps are high-pressure units that require an external fuel pressure regulator to prevent carburetor flooding.

Fuel Compatibility: If you plan to use E85 or other alcohol-based fuels, ensure the pump and all other components are compatible. Summit Racing pumps are E85 compatible but NOT compatible with Methanol fuel.

Physical Configuration: Decide between external mounting (Summit pumps are inline external units) versus in-tank options. Summit pumps are designed for chassis mounting near the fuel tank.

Proper Mounting Location and Installation

The mounting location of your Summit Racing electric fuel pump is critical for both performance and safety. Follow these guidelines precisely:

Mounting Requirements:

  • The pump must be mounted below the lowest point of the fuel tank. This allows for gravity-fed fuel supply and prevents the pump from having to suck fuel out of the tank.
  • Mount the pump as close to the fuel tank as possible, typically within two to three feet.
  • The pump should be mounted vertically with the motor on top. This orientation allows for proper internal lubrication and cooling.
  • Mount the pump on the vehicle's chassis frame, away from moving suspension parts, drivetrain components, and the exhaust system.

Locations to Avoid:

  • Do NOT mount the pump in an enclosed area such as the vehicle's trunk.
  • Avoid areas with low ground clearance where flying rocks or road debris can cause damage.
  • Keep the pump away from heat sources exceeding 140°F (60°C).
  • Do not mount where the pump or fuel lines can contact moving parts or chafe against the vehicle body.

Step-by-Step Mounting Process:

  1. Select a mounting site as close as possible to the fuel supply and away from heat sources.
  2. Use the supplied mounting bracket as a template and drill two clearance holes for 5/16" bolts.
  3. Place the rubber gaskets between the mounting bracket and motor housing. These gaskets help reduce vibration and noise.
  4. Mount the pump in the vertical position with the motor on top using the provided bolts.

Safety Warning: The pump and connecting hoses must not be subjected to low ground clearance where road debris can cause damage. Failure to avoid these hazards will lead to pump damage, which could result in fire, property damage, serious injury, and/or death.

Fuel Line Connections and Plumbing

Proper fuel line routing is essential for reliable pump operation and system safety:

Recommended Hose and Fittings:

  • Use 3/8" I.D. fuel hose for the Blue pump and 1/2" or larger for the Black pump.
  • Use fuel-resistant hoses rated for the pressure your system will generate. SAE 30R7 or better hoses are recommended.
  • Avoid sharp bends in fuel lines as these cause flow restrictions. Use fittings with sweep radius bends instead.
  • All fuel line connections must be leakproof. Use proper clamps on all hose connections.

Filter Requirements:

  • Install a high-capacity fuel pre-filter (minimum 100 micron filtration) between the fuel tank and the pump to protect the pump from debris damage.
  • Install a high-quality fuel filter (minimum 40 micron) between the pump and the fuel pressure regulator or carburetor.
  • Coarse screen-type filters before the pump and high-quality filters after the pump are strongly recommended.

Connection Sequence:

  1. Connect the fuel line from the tank to the pre-filter.
  2. Connect the pre-filter to the inlet port of the pump.
  3. Connect the pump outlet to the post-filter or directly to the fuel pressure regulator.
  4. Connect the regulator to the carburetor fuel inlet.

Thread Sealant Requirements:

Use a thread sealant with PTFE (Teflon) when installing NPT fittings. Do NOT use silicone-based sealant or PTFE tape, as these can cause sealing failures and leaks.

Torque Specifications:

Do not overtighten fittings on the fuel pump or regulator. Assembly torque should not exceed 40 ft/lbs. Hand tighten the fitting, then use a wrench for an additional 3/4 of one turn. Overtightening can cause parts to crack, allowing fuel to leak, which can lead to fire and explosion.

Wiring Your Summit Racing Electric Fuel Pump

Proper wiring is critical for safe and reliable pump operation. Never wire the pump directly to a switch or the battery without proper protection:

Required Components:

  • Fuel pump relay (Bosch-type relay recommended).
  • Inline fuse rated for the pump's current draw (typically 3-5 amps for smaller pumps, check your specific pump specifications).
  • Appropriate gauge wire (at least 14-gauge for most applications).

Wiring Steps:

  1. Connect the pump's positive (red) wire to terminal 87 on the relay.
  2. Run a fused wire from the battery's positive terminal to terminal 30 on the relay.
  3. Connect terminal 86 on the relay to an ignition-controlled power source. This ensures the pump only runs when the key is turned to the ON position.
  4. Connect terminal 85 on the relay to a clean chassis ground.
  5. Ground the pump's negative (black) wire to the vehicle's chassis.

Safety Switch Integration:

For vehicles transitioning from a mechanical fuel pump, install an oil pressure safety switch. This switch cuts power to the fuel pump when oil pressure drops, such as when the engine stalls or is turned off. Connect the oil pressure switch between the ignition power source and the relay trigger terminal.

An inertia safety switch is also recommended. This switch shuts off the fuel pump in case of an accident, preventing continuous fuel flow that could cause a fire.

Using a Fuel Pressure Regulator

Both Summit Racing electric fuel pumps are high-pressure units that require an external fuel pressure regulator:

Why You Need a Regulator:

The Blue pump delivers 19 PSI and the Black pump delivers 22 PSI. Most carbureted engines require only 5-9 PSI. Without a regulator, this excessive pressure will flood the carburetor, causing rich running conditions, poor performance, and potential engine damage.

Recommended Regulator:

Summit recommends the SUM-G3032 fuel pressure regulator for use with these pumps. This regulator is adjustable from 4-1/2 to 9 PSI and features 3/8" NPT inlet and outlet port threads.

Installation Tips:

  • Install the regulator in the line between the pump and the carburetor.
  • Mount the regulator in a location that is accessible for adjustment.
  • Use the same thread sealant and torque specifications as for the pump fittings.
  • Test pressure settings before finalizing the installation.

Priming and Testing the System

After installation is complete, follow these steps to prime and test the system:

Pre-Start Checks:

  1. Double-check all fuel line connections for tightness and security.
  2. Reconnect the battery and ensure all electrical connections are secure.
  3. Turn the ignition to the ON position without starting the engine to allow the pump to prime. You should hear the pump operating.
  4. Listen for any unusual noises that could indicate mounting issues or air in the system.
  5. Check for fuel leaks at all connections. Address any leaks immediately before proceeding.

Initial Start:

  • If your vehicle uses an oil pressure-based safety switch, you will need to crank the engine to build oil pressure and enable the fuel pump.
  • Start the engine and let it idle, monitoring for any fuel delivery issues such as sputtering or hesitation.
  • Check fuel pressure with a gauge if possible to verify the regulator is set correctly.
  • Inspect all connections again for leaks after the engine has been running.

Test Drive and Final Checks:

  • Drive a few miles and then inspect all fuel line connections.
  • Check the pump wiring and relay to ensure they remain in good condition.
  • Address any leaks or issues immediately.
  • Periodically check the pump and filter for debris or wear.

Troubleshooting Common Issues

Even with careful installation, issues can occasionally arise. Here is how to diagnose and resolve common problems:

Pump Does Not Prime:

Check power at the pump connections with a multimeter. Ensure the relay is functioning and the fuse is not blown. Verify the oil pressure switch is not preventing power flow.

Fuel Leaks:

Address any seepage immediately. Check that all fittings are properly torqued and thread sealant has been applied correctly. Inspect hoses for cracks or damage.

Engine Sputtering:

This may indicate air in the fuel lines. Cycle the ignition multiple times to purge air from the system. Check for restrictions in fuel lines or filters.

Unusual Noise from Pump:

Often caused by improper mounting orientation or vibration. Ensure the pump is mounted vertically with the motor on top and that rubber gaskets are properly installed between the bracket and pump housing.

Pressure Irregularities:

Check for restrictions in fuel lines or filters. Verify the fuel pressure regulator is functioning and set correctly. Ensure the pre-filter is not clogged.

Maintenance Tips for Long Pump Life

To maximize the life of your Summit Racing electric fuel pump:

Regular Filter Replacement:

Replace the fuel filter annually. This helps prevent debris from reaching the pump and causing premature failure. A clogged filter forces the pump to work harder, reducing its lifespan.

Keep the Pump Clean:

Periodically inspect the pump and surrounding area for dirt, debris, or road grime. Clean as necessary to prevent overheating and ensure proper operation.

Monitor Electrical Connections:

Check wiring and relay connections regularly for corrosion or looseness. Clean and tighten as needed to maintain proper voltage delivery to the pump.

Use Quality Fuel:

Avoid contaminated fuel and fuel containing excessive water or debris. If using alcohol-based fuels, monitor more frequently as these fuels can break down rubber hoses and absorb water.

Listen for Changes:

Pay attention to changes in pump noise. A pump that becomes louder or develops unusual sounds may be failing and should be inspected.

Recommended Brand for Superior Performance

While Summit Racing electric fuel pumps are excellent choices for performance applications, if you are looking for a high-performance OEM replacement fuel pump with exceptional reliability and warranty coverage, consider the KEMSO brand.

KEMSO Fuel Pump Advantages:

  • High Performance: KEMSO fuel pumps are engineered for maximum flow and pressure consistency, making them ideal for both daily drivers and high-performance vehicles.
  • OEM Replacement: These pumps are designed as direct replacements for factory equipment, ensuring proper fit and function without modification.
  • Lifetime Warranty: KEMSO stands behind their products with a lifetime warranty, giving you peace of mind that your investment is protected.

Visit their website at https://www.kemsoracing.com/ to explore their complete line of fuel pumps and related performance products.

Final Thoughts on Summit Racing Electric Fuel Pump Installation

Installing a Summit Racing electric fuel pump is a practical upgrade that can significantly improve your vehicle's fuel delivery, performance, and reliability. The key to success lies in proper planning and execution. Remember these critical points:

  1. Mount the pump below the fuel tank and as close to it as possible for gravity-fed operation.
  2. Use a relay and proper wiring to protect the pump and electrical system.
  3. Install a fuel pressure regulator to prevent carburetor flooding.
  4. Use high-quality filters both before and after the pump.
  5. Check all connections for leaks before and after starting the engine.
  6. Follow all safety precautions when working with fuel systems.

By following the guidelines in this article, you can ensure a successful installation that delivers years of reliable service. Whether you choose a Summit Racing pump or explore alternatives like KEMSO, proper installation is the foundation of a safe and effective fuel delivery system.

For high-quality OEM replacement fuel pumps with lifetime warranty, visit https://www.kemsoracing.com/ to find the perfect solution for your vehicle's fuel system needs.


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