All About 7.3 Performance Injectors

So you are ready in the next step to upgrade your 7.3 Powerstroke.  As your trucks injectors wear out or fail you must ask yourself should you spend a few more dollars to increase the performance of your injectors?


Modified performance 7.3 Powerstroke Full Force Injectors can give you a moderate boost in fuel economy and performance.


Let’s start with the stock injectors.  
The 7.3 Powerstroke stock injector is just that, for stock truck performance.  They are limited by the total fuel output.  OBS injectors are rated at approximately 90cc of flow and they are single shot by design.  The supderduty injectors are limited to a effective flow rate of approximately 120cc of flow in a split shot design.  With these flow rates you are limited in power by a performance chip to the max potential of the stock injectors.  Max HP with a chip will net you around 70 HP in the OBS and around 140 HP in the Superduty truck.


So what makes a performance injector make more power?  
When the injectors are modified, all injectors at Full Force are converted to a single shot design.  This design is best for overall performance and injector efficiency.  In the Superduty 99-03 this is especially beneficial to completely remove the split shot of the stock injector.  This is wasted fuel that’s not used by the truck for making power but to lower the engine noise by about 15-20%.  


Full Force increases the CC of fuel delivery and nozzle sizes to achieve more power and performance.  With modifications inside the injector we can increase the flow rate up to 450 cc’s of fuel flow.  Modifications of this type allow the injector (when modified with Injector Tuning) to open farther and increase the fuel volume into the cylinder.


So what do the CC flow and nozzle size mean? 
Each increase in CC of flow will inject more fuel into the cylinder to make a larger explosion inside the engine.  So what about stock nozzles or modified nozzles?  The larger the nozzle the faster the injector can empty it’s fuel volume into the cylinder.  This nozzle give a more precise timing for the explosion.


How to choose the correct size performance injector.  
When deciding what size injector best suits your needs you must first decide what you goals are for you.  


A tow truck or work truck will need less CC and a smaller nozzle.  The reason for this is simple.  Lower EGT’s and less strain on your drivetrain.  Can you add bigger injectors and still tow?  Absolutely, but keep in mind you will need to upgrade to lower the risk of high EGT’s and possibly improve your drivetrain durability.  To lower the EGT’s you can add more air with a turbo upgrade.


A street truck can handle a larger CC injector due to the fact the EGT’s will be less of a concern.  When not loaded short bursts of high EGT’s are acceptable and shouldn’t result in problems.  However the drivetrain will suffer high levels of strain as the HP is increased.  Turbo upgrades and drivetrain upgrades are recommend to run larger injectors.


A competition truck does not have CC limits due to the fact that most of these trucks need to produce the most power and performance available.  The trucks are typically highly modified and usually aren’t street driven on a daily basis.


What upgrades do you need with injectors?
All trucks will need to have gauges to monitor your trucks performance.  All trucks will need a injector specific tuned chip to increase the flow and tell the truck to utilize the upgrades.  Other than these two highly important upgrades, each and every modification you do to your truck to increase airflow through the engine will allow you to utilize more of the power and possibly increase the size of your injector upgrade recommendation.  The airflow upgrades include cold air intakes, exhaust systems, and turbo upgrades.


If you have any questions call our sales team or contact us today!