Fuel injectors are one of the most misunderstood—and most important—components in your Harley’s performance. In Episode 6, Jamie and Lucas break down how to properly choose the right injector for your build using real-world data, not internet myths.

They cover OEM injector sizing across Twin Cam and Milwaukee-Eight platforms, how to read ECU data like duty cycle and pulse width, and why bigger injectors don’t mean more power. You’ll also learn the often-overlooked factor that can make or break drivability: minimum pulse width and low-speed control.

Whether you’re building a mild cam setup or a high-horsepower engine, this episode gives you the knowledge to avoid common mistakes, improve tuning accuracy, and get the most out of your combination.

In this episode:

• Why injector size should be based on your engine—not guesswork
• How to log and interpret duty cycle and pulse width
• The truth about the “80% rule” (and what actually works for Harleys)
• Why oversized injectors hurt low-speed performance
• Real-world guidelines for Twin Cam and M8 injector sizing
• The importance of spray pattern, fuel pressure, and injector quality

If you’ve ever wondered whether you actually need bigger injectors—or how to choose the right ones—this episode will save you time, money, and frustration.

LINK: https://university.fuelmotousa.com/article/choosing-the-right-fuel-injector-for-your-harley-davidson-milwaukee-8-or-twin-cam/