Fuel System

One of the critical and key areas to address whenever you are modifying your engine to make more boost and more power. Anytime you perform modifications that increase power, you need to supplement the power with a proper amount of fuel. Otherwise, you will lean out your engine and melt a piston. With mild modifications, sometimes you can get away with a higher-flowing fuel pump. But when you start making nearly 4 wheel and above, you want to start upgrading to larger injectors, a larger fuel pump to feed those injectors. A fuel pressure regulator to have a solid static base pressure while idling, and upgraded fuel lines so that the fuel can flow. If you are hitting boost cut under load, you may have maximized your injector output or duty cycle. If you want to convert to ethanol, you must run a larger injector and pumps because ethanol requires a larger duty cycle. In this section, you will find all of the main fuel system upgrades and enhancements to supplement your fuel system accordingly to your upgrades. 

 

• FUEL PUMP KITS: If you need more fuel flow for your basic upgrades, or if you need a fuel pump with a larger LPH to feed the fuel necessary for your larger kits we certainly have an option. LPH stands for liters per hour, and your factory fuel pump can only produce so much volume before you hit fuel cut under load. The kits we have available are brought to you by the most established brands in the performance aftermarket, and there are several plug-and-play options that allow you to make a direct swap for your OEM unit. You can find the basic 255 LPH fuel pump and then we have units that produce 45+ LPH for bigger power applications. Depending on what injector size you have and what type of fuel you will be running, we have an option that will feed your engine with a proper amount of fuel to allow you to make the power you need. 

 

• FUEL INJECTORS: The next logical upgrade in your fuel system. When you have an intake, downpipe, and cat-back, some platforms with a proper tune can make substantial power gains with these basic modifications. However, you will hit a ceiling before things get dangerous. Meaning, you will need to upgrade your injectors so you don't lean out your engine. Your factory injectors can only handle so much volume so you need to go to a larger injector size. With a proper tune, 8-12cc injectors provide a great amount of volume with great street manners. Anything larger your MPG will be affected but when you're making big power fuel economy is usually not considered. Make sure you have a proper tune to make sure your driving manners are smooth with a good cold start and a good idle. 

 

• FUEL RAILS: Fuel rails will be required especially if you are running a larger injector. You will need the proper fuel flow required to supplement the injectors. The fuel rails we carry will all feature a larger internal bore. We carry several upon several options brought to you all by familiar brands that you cannot go wrong with. For Subaru models, we have great top feed and side feed options for those of you who need to build a parallel system and we carry fuel rails for other makes and models such as the Mitsubishi Evolution because all turbocharged vehicles love to drink more than others. With a smaller injector size, you might be able to get away with utilizing your factory fuel rails, but hardly the case. It is always wise to upgrade any component within your fuel system that promotes unobstructed flow so that your tune and the welfare of your engine will stay strong. 

 

• FUEL SYSTEM KITS: This is a great option for those of you who want to rule out any guesswork when building your fuel system. The fuel system kits will include pre-cut fuel lines, fittings, and in a few cases injectors to allow the user to have a direct bolt-on system that will work with moderate performance upgrades. Kits are available from DeatschWerks, IAG, and Radium to supplement the fuel system in your WRX or in your Evo., just add a proper fuel pump and fuel pressure regulator to complete your kit. 

 

• FUEL PRESSURE REGULATORS: You have a larger fuel pump, and you have larger fuel injectors and fuel rails, now you will need a fuel pressure regulator. As the name suggests, fuel pressure regulators will control the fuel going into your injectors so that you don't have rich or lean running conditions. Depending on your application, base fuel pressure is set anywhere from 43 psi to 5 psi, and if you have a high-flowing fuel pump or more than one fuel pump, fuel pressure regulators are also used as a tool because a low reading on your FUEL PRESSURE REGULATOR GAUGE could indicate that your fuel pump is getting weak, you may have debris in your fuel system, or you could have an internal or external leak. 

 

• FUEL FILTERS: These are especially important if you run ethanol as ethanol can break down certain fuel components over long periods of use. As much as we love how affordable ethanol is when compared to race gas, prolonged use can cause other internal fuel components made of rubber to come apart if you do not run a cycle of pump gas every once in a while. Additionally, older gas stations have tanks where the insides break apart and little particles can make it through the filtering system and into your tank. This is really important to consider with a built fuel system as the overall tune and running welfare of your engine greatly relies on how clean your fuel is, and how well it flows. We carry a big selection of fuel filters that feature stainless steel mesh cartridges that are serviceable in case you happen to find debris that can disrupt your fuel flow. Make sure you check on these every year to make sure your fuel system is properly filtered and making proper fuel pressure.