Modifying A Holley Carburetor For Screw in Air Bleeds

If you have a carb and some time to waste, this is how you modify a 4150 Holley for screw in air bleeds. This gives you the ability to adjust the fuel curve throughout the rpms.

[@aaronburleson2454]

What about the shavings that went inside the carb

[@koalafiedengineering1200]

I may have omitted the cleaning process in this video but it is super easy to clean with brake clean and compressed air.

[@Zacattack90]

Will this be featured on the antique roadshow?

[@inscoredbz]

Why do you say its a waste of time?

[@koalafiedengineering1200]

Holley makes carbs with screw in air bleeds and the aftermarket efi is getting unbelievably good. I still love carbs and will always have some personal vehicles running them.

[@inscoredbz]

@@koalafiedengineering1200 I'm thinking efi myself for my 383. The cost of carbs and regular mechanical fuel pumps has gotten crazy expensive.

[@koalafiedengineering1200]

You're right and it's sad. When Holley was selling the factory reman 750 vacuum secondary carbs for $250ish around 2010 you could buy a secondary spring kit and a jet kit and make any domestic v8 run and drive good. after I'm done posting ranger stuff there might be some draw through hobbs switch stuff. @@inscoredbz