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How To Adjust Holley Carburetor Vacuum Secondary Springs

Holley offers some tips on how to properly operate and adjust four-barrel carburetors with vacuum secondary throttle blades. The video describes the various rate secondary springs, how to change them, and the testing procedures to follow to make sure the secondaries open properly for best performance.


 


More Videos...


Holley 750 cfm 4150 Rebuild A to Z with a Percy's Adjust-A-Jet Addition Vacuum Secondary
Pretty typical vacuum secondary Holley rebuild. Newer Holley carbs come with power valve blow out protection. This is a old carb.





Holley Carburetor Tuning Secondary Circuit - Summit Racing Quick Flicks
Norm walks you though how to properly adjust the secondary circuit on a Holley 4 Barrel Carburetor. Vacuum Secondaries or Mechanical Secondaries it doesn't matter, Norm has you covered and achieving that top end speed. Find everything you need for your Holley Carburetor at http://www.summitracing.com/redirect?banner=SocialYT4535





Edelbrock E-Street EFI System Installation
We install Edelbrock's self-learning E-Street EFI and Universal Fuel Sump system on PHR's 1968 Chevy Nova project car.





How To Adjust The Accelerator Pump On Holley Carburetors
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?428-How-To-Cure-Carburetor-Stumble





Accelerator Pump
Footage taken from Holley Carburetor Installation & Tuning DVD





How To Adjust Fuel And Float Level On Holley Carbs
Holley demonstrates how to properly adjust the fuel level and the float on Holley four-barrel carburetors.





Holley Carb Tech
A few Holley carb basics. Groutaone official race gear found here http://www.groutaone.com/





Carburetor Idle Adjustment - Summit Racing Quick Flicks
Holley Carburetor not Idling smoothly? Norm walks you through the basics of how to tune your Holley Carb for a smooth idle by completely discussing the idle circuit. From curb idle screw to the idle mixture screws, Norm covers it all. Be sure to watch our other Summit Racing Quick Flicks on Carburetor Tuning: Inlet Circuit Tuning http://www.summitracing.com/redirect?banner=SocialYT4509





Holley Carb Stumble Fix pt-1
Properly setting up Hollys accelerator pump. Groutaone official race gear found here http://www.groutaone.com/





How To Diagnose Common Engine Problems With A Vacuum Gauge
How to use a vacuum gauge on a carbureted engine to diagnose problems like a sticky valve, ignition component problems or too much advanced timing, a dirty air filter, vacuum leaks, worn piston rings, improper cam timing, rich or lean mixture, and more. More information is located on Holley's website: http://forums.holley.com/entry.php?429-How-To-Adjust-The-Idle-Mixture-On-Ho lley-Carbs





Holley carb adjustment basics
-just a quick overview of how to adjust a holley and what to know. happy to answer any tuning issues. i know far more than id like to about these old holleys. not a very good public speaker clearly. HOLLEY CARB FLOODING & HARD STARTING SOLUTIONS http://youtu.be/hn4HovYvrF0





Vacuum Lines Connection
Footage taken from Holley Carburetor Installation & Tuning DVD





Carburetor Main Jet Tuning - Summit Racing Quick Flicks
In this video Norm breaks down the Main Circuit of a Holley Carburetor. First covering the process of adjusting the Primary Jets, moving into the tuning of the Secondary Jets, and Norm follows that up with talking about the venturi effect and how that plays an important role in how a carburetor works. http://www.summitracing.com/redirect?banner=SocialYT4510





Some basic Holley 4 Barrel carburetor identification tips
Looking at a few common Holley 4 Barrel carburetors in this video and showing some differences.





How And When To Change The Jets On A Holley Carb
Holley explains how the main jets on a four-barrel carburetor operate. They also give instructions on changing the jets for increased performance. The video explains the various jet sizes, and how they affect engine performance.




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