​Fuel Delivery Upgrades

Increasing engine power requires pumping more air and fuel into the engine. Whether you're getting that air into the motor by increasing displacement, using a different cam or adding forced induction, you need a fuel system that can keep up.

Fuel Tanks

Hard driving, whether going around corners or launching at the drag strip, can cause fuel to move away from the fuel intake, starving your engine. A fuel cell can keep the inlet submerged, but if you want to keep a tank in the stock location, there's another option: Aeromotive's stealth system. Based on the out-of-production '03-04 Cobra tank, it's been modified to fit a wide range of models while maintaining Ford's baffle design.


Fuel Pumps

On systems with a return line, any extra fuel pumped into the intake flows back to the tank, so the pump is always kept flowing at 100%. That means if you put a bigger pump than you need, all the extra fuel goes back into the tank with no extra tuning. Ford switched to a returnless system in 1999 models, which uses a Fuel Pump Driver Module (FPDM) to vary voltage to the pump. This changes the amount of fuel being moves so there's always just enough on hand to feed the injectors and needs to be modified to work with different pumps and fuel requirements. An EFI tuner is needed to use an aftermarket pump with this system.

In-line pumps can be bigger than in-tank pumps. This lets them flow more at the cost of reliability since they can't dissipate heat through the fuel.

A “boost-a-pump” increases voltage to the pump, making it work past its 100% duty cycle. This is an easy way to get more fuel out of a stock pump, but where it really shines is in giving you some breathing room if you're already running near 100% duty cycle on a forced induction build. The boost-a-pump can kick in when it reads high manifold pressure, keeping the engine from running lean and damaging itself. Voltage regulators like the JMS PowerMAX can also be used to scale fuel pressure with boost pressure readings if you're adding forced induction.

Fuel Regulator

The regulator controls the amount of fuel entering the fuel rails. On a stock motor, the pressure regulator is controlled by manifold vacuum and, in the case of forced induction motors, manifold pressure. This can cause problems if the motor isn't holding vacuum at idle due to a radical cam profile or the boost pressure goes beyond what the regulator can handle. Aftermarket regulators are adjustable and can handle much higher pressures to feed aftermarket fuel rails and carburetors.


Carburetors

Why replace your car's fuel injection system with a carburetor? They don't have the fine control of an EFI system, but they're simple to install and tune, and can save some major wiring headaches when doing an engine swap. They also allow more options when it comes to intake manifolds. Fuel injection can still be used with carburetor manifolds by replacing the stock setup with a throttle body design like the Holley Eliminator or the MSD Atomic. These fit onto carburetor manifolds and come with ECUs for tuning.


Fuel Injectors

Bigger injectors mean more fuel can be strayed into the intake to match added fuel from modifications, and that means more power. When changing injectors, the ECU needs to be modified to match the amount of fuel being sprayed into the intake with the airflow readings from the MAF sensor. If unmodified, the ECU will active the new injector for the same duration for a given amount of air as the stock injector, making the mixture far too rich. Low impedance injectors use a different signal to activate than the stock high impedance injectors, requiring a different injector drive for the ECU.


Fuel Rails

When you're using big injectors, flow can be limited by the amount of fuel that can be delivered through the rails. When switching to larger rails, take into consideration whether you'll want to run nitrous: many systems are “wet” and will need a way to tap into the rails to get the fuel that they spray into the intake alongside the nitrous.


Start Upgrading Your Fuel System Today

Anderson Ford Motorsport has been tuning Mustangs for nearly three decades, so we know what works. We offer all the parts you need to get your fuel system to work with your build from the tank to the injectors.