Knowledge Injection: S&S Diesel Talks Fuel Injection Misconceptions

Getting the right amount of fuel into a cylinder bore during the combustion process via a set of fuel injectors relies on many different factors, and it’s critical to make sure the engine can be tuned properly. Diesel performance engines are fed a diet heavy in boost, so if they don’t get the right amount of fuel things will go wrong in a hurry and that’s where S&S Diesel Motorsport comes in. The team at S&S Diesel created this great video to help diesel owners better understand injectors.

Like so many other areas of the high-performance universe, there’re a lot of misconceptions about how fuel injectors actually work. Energizing time or pulse are two terms that can be used interchangeably to talk about when a fuel injector opens after power is applied. Another technical term used in fuel injection is injection duration — this is the time period when fuel from the injector enters the combustion area of the engine.

One of the misconceptions in the diesel world is that energizing time is the same as injection duration, which it isn’t. Andrew Stauffer from S&S does a great job breaking down the difference between these terms in this video. During his explanation, Stauffer shows how these terms and theories are applied to different injectors used in common rail fuel systems. The diagrams that Stauffer creates explain how energizing time and injection duration interact when an injector fires.

In the last part of this video, Stauffer covers why it’s important to have nozzle flows that match each other for an entire set of injectors, and why extending the end of injection is a bad practice. If you don’t have the right end of injection calculated it will make tuning your engine difficult and could lead to damage.

To learn more about high-performance fuel injection for diesel applications check out the S&S Diesel website right here.

Article Sources

About the author

Brian Wagner

Spending his childhood at different race tracks around Ohio with his family’s 1967 Nova, Brian developed a true love for drag racing. When Brian is not writing, you can find him at the track as a crew chief, doing freelance photography, or beating on his nitrous-fed 2000 Trans Am.
Read My Articles

Enlist in the Diesel Army newsletter.

Receive the latest newsletter with the content you love from Diesel Army, directly to your inbox, absolutely FREE!

Free WordPress Themes
Diesel Army NEWSLETTER - SIGN UP FREE!

We will safeguard your e-mail and only send content you request.

Diesel Army

We'll send you the most exciting Diesel articles, news, truck features, and videos every week.

Diesel Army

Diesel Army NEWSLETTER - SIGN UP FREE!

We will safeguard your e-mail and only send content you request.

Diesel Army

Thank you for your subscription.

Subscribe to more FREE Online Magazines!

We think you might like...



Off road, Jeeps, 4x4s

Engine Tech

Drag Racing

Diesel Army

Thank you for your subscription.

Subscribe to more FREE Online Magazines!

We think you might like...

  • Off road, Jeeps, 4x4s
  • Engine Tech
  • Drag Racing

Diesel Army

Thank you for your subscription.

Thank you for your subscription.

Diesel Army

Thank you for your subscription.

Thank you for your subscription.

Loading