The Ford 5.8L engine, commonly found in F-150 and Bronco models, often undergoes a smog pump delete modification. This process requires selecting the correct belt size to ensure proper function after removing the smog pump. Based on various user experiences and recommendations, here's a comprehensive guide to help you choose the right belt size for your Ford 5.8 smog pump delete.

Recommended Belt Sizes

When deleting the smog pump on a Ford 5.8L engine, the most commonly recommended belt sizes are:

  • 94.5 inches: This size is frequently mentioned as a good fit for many 5.8L engines after smog pump removal.
  • 91 inches: Some users have reported success with this slightly shorter belt, though it may be quite tight initially.
  • 94 to 95 inches: This range allows for some adjustment depending on your specific setup.

It's important to note that the exact size may vary slightly depending on your truck's model year and other modifications.

Factors Affecting Belt Size

Several factors can influence the ideal belt size for your smog pump delete:

  • Pulley configuration: The size and arrangement of your remaining pulleys can affect the required belt length.
  • Tensioner position: The location and type of tensioner on your engine may impact belt sizing.
  • Additional modifications: If you've made other changes to your engine, such as removing the A/C compressor, this will affect the belt size needed.

Installation Tips

When installing your new belt:

  • Purchase multiple sizes: It's often recommended to buy a few different belt sizes close to the suggested length. This allows you to test fit and find the perfect size for your specific setup.
  • Check tensioner alignment: Ensure that the belt tensioner arrow falls within the indicated range after installation.
  • Observe belt operation: After installation, run the engine and observe the belt to ensure it's not too loose or tight.

Additional Considerations

When performing a smog pump delete on your Ford 5.8L engine:

  • Legal implications: Be aware that removing emissions equipment may not be legal in all areas. Check your local regulations before proceeding.
  • Engine performance: While removing the smog pump can free up some horsepower, it may affect emissions and potentially trigger check engine lights.
  • Proper plugs and caps: Ensure you have the correct plugs and caps to seal off any openings left by the smog pump removal.

By following these guidelines and being prepared with a few belt options, you should be able to successfully complete your Ford 5.8 smog pump delete and achieve proper belt fitment.