EFI Conversion Made Easy – Boost Performance in Your Classic Chevy

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Upgrade Your Classic Chevy with Modern EFI Performance​

Modern self-tuning EFI conversion kits from industry leaders like CPP, Holley, FiTech, Edelbrock, FAST, and MSD have transformed fuel injection upgrades into a true bolt-on, DIY-friendly project.
For those tackling an LS swap, Chevrolet Performance offers complete LS control module kits that pair perfectly with their crate engines, making the process remarkably straightforward.


Why Convert to EFI?
It’s a new era of performance for classic cars. Even with today’s user-friendly products, converting your vintage Chevy to electronic fuel injection—whether it’s a TBI-style EFI conversion on your existing small-block or big-block Chevy, or a complete LS engine swap—offers major benefits:

• Improved drivability with instant throttle response
• Better fuel efficiency and reduced emissions
• Reliable starting in all weather conditions
• Self-tuning adaptability for different driving conditions

It’s More Than Just Bolting On a Throttle Body
Even though EFI kits are more plug-and-play than ever, a successful carburetor-to-EFI conversion requires more than installing a throttle body injection kit and a high-pressure EFI fuel pump. You’ll need to address several supporting systems, including:

1. EFI Wiring Harness Integration – Connect the engine to the ECU for accurate sensor readings and fuel control.
2. Fuel System Design – Include high-pressure lines, filters, and return lines for consistent delivery.
3. Controller Placement – Ensure accessibility and protection from heat and moisture.
4. Sensor Installation – TPS, O₂, MAP, and coolant temp sensors must be installed and calibrated.
5. Fabrication Needs – Brackets, mounts, and custom plumbing may be required for a clean install.

Thanks to strong aftermarket support, these steps are easier than ever to manage, though some custom work is often part of the process.

The 10 Essentials of a Chevy EFI Conversion
We’ve outlined 10 essential EFI components and sub-projects that are common to most Chevy EFI conversions. These will give you a realistic idea of what’s involved when replacing your carburetor:

• EFI fuel pump & filter assembly
• Fuel return line setup
• Throttle body or multi-port intake
• Fuel rails and injectors
• ECU & harness integration
• Oxygen sensors and wiring
• TPS and MAP sensors
• Fuel pressure regulator
• Proper grounding and electrical upgrades
• Controller programming or self-tuning setup

Don’t Fear the Wires—Enjoy the Results
Whether your goal is better throttle response, increased reliability, or modern restomod fuel system performance, don’t be intimidated by the extra wiring. With proper planning, your EFI installation can bring:

• Modern performance to your classic Chevy
• Smooth power delivery across the RPM range
• Confidence for long-distance cruising
• Adaptability for future engine upgrades

Ready to Make the Swap?
Upgrading to electronic fuel injection is one of the best ways to modernize your classic Chevy. Whether you’re installing a TBI system or going all-in with an LS swap, planning for wiring, sensors, and a proper fuel system will ensure a smooth, reliable installation.

Explore Classic Performance Products’ EFI solutions today and take your build into the modern era of performance.