What Is CFI?

A modern upgrade that keeps your carburetor right where it belongs, on the engine.

Classic‑car owners have always faced a forced choice:

  • Carburetor — authentic, powerful, simple, somewhat inefficient
  • EFI — precise, consistent, adaptive

The CFI Enforcer Series Classic removes that choice entirely. It’s a hybrid system that keeps your carburetor in place while adding the intelligence of modern electronics.

You keep the look, power, and character of a carburetor — and gain the drivability and consistency of EFI.

A Hybrid System, Not a Replacement

The CFI Enforcer Classic works in collaboration with your carburetor, not instead of it.

  • The carburetor continues to meter airflow and provide baseline fuel.
  • The ECU adds supplemental fuel and optimized ignition timing based on real‑time sensor feedback.

Nothing about your carburetor’s appearance or airflow changes. You simply gain modern control on top of it.

Why It Exists

Carburetors run great at wide‑open throttle, but often struggle with:

  • Cold starts
  • Warm-ups
  • Part‑throttle drivability
  • Altitude and environmental changes
  • Fuel quality differences

EFI solves those issues — but requires:

  • High‑pressure pumps
  • Return lines
  • Tank modifications or replacement
  • Full electronic dependence
  • Loss of carburetor character

The CFI Enforcer gives you the best of both worlds without the compromises.

Key Benefits

✔ Classic carburetor look stays untouched

No throttle body conversion. No hidden EFI unit.

✔ Peak horsepower is retained

Your carburetor still provides charge cooling for max power.

✔ Cold starts become automatic

No choke. No pumping. No drama.

✔ Smooth idle and part‑throttle behavior

Closed‑loop AFR correction keeps the mixture clean and efficient.

✔ Better mileage and cleaner exhaust

The system trims out the lean areas carburetors can’t fix.

✔ True mechanical fail‑safe

If electronics fail, the carburetor keeps running normally.

✔ No EFI plumbing required

Works with low‑pressure (3–10 psi) or optional high‑pressure setups.

How It Works (Simple Version)

1. Carburetor = Airflow + Baseline Fuel

Your carburetor still handles the main job.

2. ECU = Supplemental Fuel + Spark Control

Injectors add fuel only when needed. Ignition timing adjusts automatically for smoother operation.

3. Sensors Close the Loop

The system constantly monitors AFR, RPM, temperature, and load to keep the engine running clean and consistent.

Why It’s Better Than EFI or TBI

Compared to EFI:

  • No tank modifications or replacement
  • No high‑pressure plumbing
  • No loss of carburetor character
  • True mechanical backup if electronics fail

Compared to TBI:

  • Carburetor airflow is preserved
  • No throttle‑body restriction
  • Better power retention
  • Cleaner, more precise supplemental fueling

A Quick Comparison

Feature

Carburetor

EFI

CFI Enforcer

Classic look

✔

✘

✔

Peak horsepower

✔

Sometimes ✘

✔

Cold starts

✘

✔

✔

Part‑throttle drivability

✘

✔

✔

Fuel‑system plumbing

Low

High

Low or High

Electronic dependence

None

Full

Partial (fail‑safe)

Installation difficulty

Low

High

Low

In Plain Terms

The CFI Enforcer Classic is for people who love carburetors — but want their car to start, idle, and operate like their daily driver.

It’s not EFI. It’s not TBI. It’s a hybrid system designed specifically for classic engines.