How to Street Tune a Car

Save

Street tuning your car allows you to customize the engine's fuel curves. On stock engines, a more performance-oriented tune can be programmed, increasing the engine's horsepower output. If you've installed other performance modifications on your car, such as intake and exhaust upgrades, street tuning can be even more beneficial. Since performance modifications alter the airflow patterns of the engine, custom street tuning your engine to your particular modification setup allows for optimum engine performance.

Things You'll Need

  • Piggyback ECU tuner
  • Air/fuel ratio gauge
  • Pencil
  • Paper
  • Have a piggyback ECU tuner installed on your vehicle. These are electronic devices that tap into the engine computer, allowing user modification of the stock fuel curves. A tuner that allows for air/fuel signal monitoring is preferable, as the engine's air/fuel ratios will be used for tuning purposes. If your piggyback ECU tuner lacks an air/fuel readout, an air/fuel ratio gauge can be installed instead.

  • Drive your vehicle to redline at full throttle, allowing for the engine to run at its maximum level of performance. Have a passenger note the air/fuel ratios given by your piggyback ECU tuner or air/fuel ratio gauge readout while the engine is under acceleration. Compare these numbers with the ideal engine air/fuel ratio values given by your piggyback tuner's user manual.

  • Use your piggyback ECU tuner to increase or decrease fuel correction values at any given engine RPM. At RPM values where you noted the air/fuel ratio to be lean, increase the piggyback tuner's fuel correction value. This increases the fuel injection into the cylinder at that particular RPM, optimizing the engine's air/fuel ratio. Alternatively, decrease the tuner's fuel correction value at RPM values you noted as having a rich air/fuel ratio.

  • Repeat Steps 2 and 3 multiple times to achieve the perfect custom street tune. The more tuning sessions you run, the more optimal you'll be able to set the engine's fuel curves to maximize its horsepower and efficiency.

Related Searches

References

Promoted By Zergnet

Comments

You May Also Like

  • How to Tune Up a Car

    The term “tuneup” originally referred to a set of procedures to inspect and adjust certain components within the ignition system. Typically, these...

  • How to Adjust Air Fuel Ratio

    Modern fuel systems are electronically controlled fuel injection systems. A computer takes care of the mixing of air and fuel. However, in...

  • How to Tune a Holley Dominator

    Holley Dominators are used primarily in race cars, especially dragsters. Tuning a Holley Dominator carburetor can be a tricky process. There is...

  • How to Tune a Holley Street Avenger

    The Street Avenger series of Holley carburetors comes in 670- and 770-CFM (cubic feet per minute) airflow models. The series is equipped...

  • How to Tune a Honda With a V-AFC

    The APEXi VAFC is a piggyback fuel tuner intended for Honda applications. The VAFC works by modifying the stock oxygen sensor signal...

Related Searches

Check It Out

How To Travel For Free With Reward Points

M
Is DIY in your DNA? Become part of our maker community.
Submit Your Work!