Should you go EFI or stick with a carburettor? The choice depends on your build goals, budget, and comfort level with technology. Here's how they stack up.

Electronic Fuel Injection (EFI)

Pros:

• Superior cold starts

• Precise fuel metering

• Better for high-altitude or variable climates

• Ideal for LS and modern engines

Cons:

• More complex to install

• Requires wiring, sensors, and tuning

Suggested Image: Close-up of Holley EFI intake and fuel rails on an LS engine.

Carburettors

Pros:

• Simpler to set up and tune for basic builds

• No ECU or sensors

• Classic look and feel for hot rods

Cons:

• Less efficient

• Poor cold start behaviour

• Harder to tune under load/altitude changes

What’s Right for You?
If you're building a streetable LS swap, EFI is the way to go. For old-school cruisers or retro builds, a carb might be perfect.

Billy’s Speed Shop stocks both EFI and carburetted solutions — complete with pumps, tanks, and tuning support. Let us help you make the right call.