Remember any engine needs the proper amount of Air to breath, Fuel to support the extra Horsepower and  spark to have an effective combustion process .  The following list of suggestions can help can help your engine run at it's best!!

Throttle Position Sensor Adjustment (Green and Black Wires)
To maintain optimum performance of your 5.0 L check the setting of the throttle position (located on the top of the throttle body). Accurate adjustment will provide smooth idle and good acceleration. Using a digital volt meter or a multi-meter with the ignition key in the "on" position; but with the engine off, voltage should read between .997-999; 1.1 to 1.25 for supercharged cars. Adjust (elongate the slots if necessary) the sensor to obtain proper setting by loosening the mounting screws and moving the sensor side to side.

Ignition Timing
Most 5.0 Mustangs are delivered from the factory with the ignition timing set from 4-6° BTDC (Before Top Dead Center). Stock is 10°. With premium fuel, start at 13°-14°. If you have no detonation, increase upward.

Hurst Shifters
Installing a Hurst shifter is the best preventive maintenance you can perform on a T-5 transmission. The adjustable positive stops prevent over-shifting and bending the shift forks. When installing a Hurst shifter be sure to properly adjust the positive stops. Incorrect adjustment will result in the transmission "popping" out of gear or bent shift forks.

Silencer Removal
One of the easiest modifications you can make on an '86-93 5.0 Mustang is to remove the air
cleaner silencer as soon as you get it. The air silencer is located behind the right hand side fender. Removal allows increased air flow to the engine. Also, install a K&N air filter as it will be the last filter you buy and will increase performance.

Ignition
When supercharging your mustang, it is necessary to upgrade your ignition system. With the high boost levels, a stock coil cannot keep up with the requirements to properly fire the increased
mixture. A MSD multiple spark box will be required along with a high performance coil (like a Motorsport or MSD). If you have a lot of modifications (cam, heads, intake, injectors, and NOS or a supercharger) the addition of the Motorsport RPM extender can increase the power output
dramatically by increasing air/fuel ratio and RPM limit.

Fuel System
One of the most commonly overlooked upgrades is the fuel pump. When changing intakes, heads or injectors, depending on modifications, the pump will need to be changed to a 110 lph or 155 lph. If you use a supercharger or nitrous, a 155 lph pump minimum will be required. Depending on boost levels or nitrous levels, a 190 lph pump may be required. When upgrading the pump, it's recommended to change the regulator to an adjustable type with a gauge so exact fuel pressure can be set and monitored.

Exhaust Improvements
One of the most restrictive elements of a stock 5.0 Mustang is the factory exhaust system. With all the dimples and bends in the factory headers and pipes, unnecessary back pressure is created in the exhaust system. Installing headers and a performance exhaust system will make your Mustang run strong. Some Shorty 1 5/8 headers can do wonders. Sounds great too!! Leading off the headers there is a X Pipe or H Pipes. The H-Pipe produces a low rumble, similar to the muscle car sound of the 1960's. The X-Pipe produces a higher pitched sound, more like a European sports car.

order to get the most out of a Larger Throttle body and better flowing Intake manifold, a Larger Mass Air Meter is needed. This measures the air coming into the engine. A larger Mass Air Meter and Sensor work together with the more efficient Intake and Throttle Body.

Sub frame connectors – Help give the frame more rigidity.

Strut Tower Brace - Helps prevent from twisting the body and torque

Computer Chip This can help maintain a proper Air Fuel Ratio.

There can be an endless amount of other additions to your vehicle depending upon your budget or what your using your car for. Not all are mandatory but an engine is only as good as it’s supporting cast. The items listed above are just a laundry list of parts that will help give you some guidance.

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