How To DIY Adjust The Accelerator Pump On Holley Carburetors

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Apr 26, 2018 | 08:32 PM

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senor honda

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How To DIY Adjust The Accelerator Pump On Holley Carburetors

https://www.youtube.com/watch?v=k-Nx5HEzvlY
How To Adjust The Accelerator Pump On Holley Carburetors

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HolleyPerformance
How-to adjust the accelerator pump on Holley carburetors to avoid stumbling and hesitation upon acceleration. Tips include: How to check for the clearance between the accelerator pump diaphragm arm & operating lever; how-to select the correct accelerator pump nozzle size, and accelerator pump cam selection and installation. Additional information can be found on Holley's website: http://forums.holley.com/entry.php?42...

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Last edited by senor honda; Apr 26, 2018 at 08:35 PM.

Jun 3, 2025 | 03:42 AM

#2 (permalink)

hackito

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Solid tips in this! Mounting position and plumbing are just as important as the pump itself. Good to see Hall emphasizing oil control—too much oil in the pump can kill performance fast. Proper baffling, smart valve cover tap locations, and drain orientation really make or break the setup. Great resource for anyone dialing in their vacuum system.