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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.


 


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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





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





How To Adjust The Idle Mixture Screws On Holley Carburetors
Tips on adjusting the idle mixture on Holley carburetors, using a simple vacuum gauge. Proper idle mixture adjustments can prevent bogging, hesitation, rough idle, backfire, stalling and hard starting. Additional information can be found on Holley's Blog: http://forums.holley.com/entry.php?429-How-To-Adjust-The-Idle-Mixture-On-Ho lley-Carbs





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.





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





Slow motion video Custom Calibrated Holley Performance Carburetor.
Slow motion video of Custom Calibrated HP Hot Rod Series Holley Carburetor. You can find Custom hand built carburetors to your specifications and more at http://www.apsracingusa.com . New Custom Built HP Hot Rod Series 4150 Carburetor 750 CFM This is a Brand New Custom Built Holley Double Pump Carburetor hand assembled by Custom Carb Builder, Ron Blanchard. After the carburetor is built and calibrated to your spefications, it is tested on a LIVE engine to ensure the proper function, reliability and performance. These HP carburetors are ideal for street rods, off road racing, drag racing, and boating applications. Performance Carb has the experience and reputation of making more horsepower than the other guys. So, if you want more BANG for your BUCK, This is the Carburetor to buy! Features: - Base Plate has vacuum port for power brakes/transmission vacuum - Screw-in air bleeds - CNC Top - All metal components - Hi flow needle & seats - Dog leg Boosters - High quality components - Non-stick gaskets - Perfect for high performance street, race, or marine applications - Carbs are tuned on a test engine before shipping - All body surfaces are machined - Performance Carb uses a Superflow 1200 Flowbench for precision balancing & blueprinting of venturies, Booster signals, airspeed and total CFM - Hand built and made in the USA http://www.apsracingusa.com/content-categories/cat-148/performance_carb.htm l Music: http://www.danosongs.com - Doninator Photos: https://picasaweb.google.com/107276310312820030395/CustomHolleyPerformanceC arburetors?authuser=0&feat=directlink Buy at: http://www.apsracingusa.com/content-categories/cat-148/performance_carb.htm l http://www.apsracingusa.com/content-product_info/product_id-1971/holley_hp_ 4500_dominator_carburetor_750_1250_cfm_stage_2.html http://www.apsracingusa.com/content-product_info/product_id-1872/performanc e_carb_holley_hp_outlaw_series_carburetor_4150.html http://www.apsracingusa.com/content-product_info/product_id-2020/performanc e_carb_holley_hp_4150_stage_3_carburetor_650_1000_cfm.html http://www.apsracingusa.com/content-product_info/product_id-2019/performanc e_carb_holley_hp_outlaw_x_series_4150_carburetor.html High performance auto race racing products





Holley Power Valve Tuning Tips
How to select the right power valve for your Holley carburetor. Backfires, poor fuel economy and fouled spark plugs are indications of an improperly matched or blown out power valve. This video shows the steps to select and check the power valve using a simple vacuum gauge. Additional information is on the Holley Blog: http://forums.holley.com/entry.php?430-Holley-Power-Valve-Tuning





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





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.





How To Adjust The Secondary Speed Screw On Holley Carbs
How to properly adjust the secondary speed screw on Holley carbs. This procedure is only used on engines with large duration camshaft that have very low vacuum at idle.





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





Tuning Holley Carb- Engineering A Street Rod.mp4
Tuning the Holley 850 Carb that comes with the Chevy 502/502 Crate Engine was a fun but often frustrating task. Ultimately had to replace with an 850 Double Pumper. Even the Double Pumper needed modifications to meet our goal of 0 to 60 mph in under 3.5 seconds-which was accomplished. Details of what was done and why are outlined. Full details covered on our web site at www.netWelding.com/Holley_Carb.htm.





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





Holley Carb Rebuiding Part 3: Final Chapter
Finishing up the carburetor. I did not provide the step by step instruction that I wanted to with this series, but hopefully you will get some useful info from this.





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