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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...


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





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





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





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





Accelerator Pump
Footage taken from Holley Carburetor Installation & Tuning DVD





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 4150 Street HP carb rebuild- Tear- Down-Part 1/3
here is a video i made when I rebuilt my Holley 4150 Street HP carburetor that I purchased at a swap meet. It turns out it was in very clean condition and would not have needed rebuilding but I wanted to make sure it was clean inside. It was a good experience doing the rebuild. It's always good to learn something new. I am not a pro and this is my first Carb teardown so those folks that feel compelled to say what is wrong with what they see, please don't bother. Remember what your Mom said, "if you can't say something nice..."





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 Accelerator Pump Adjustment - Summit Racing Quick Flicks
Does your vehicle sputter at the starting line then take off? Does the engine seem to stumble at the top of the highway on-ramp? Norm discusses how to properly tune a Holley style 4 Barrel Carburetor Accelerator Pump for smooth and consistent launch down the track or onto the highway. http://www.summitracing.com/redirect?banner=SocialYT4516





Terminator EFI Install and Overview - Chuck's Garage
Chuck installs Holley's brand new Terminator EFI system on his '70 Chevelle. First we take off the old carburetor and bolt on the new Holley EFI Terminator throttle body. Then we mount the Terminator EFI ECU and wiring harness and begin wiring and plugging everything up. From there we go under the car and tackle the fuel system. After we get everything set up with the handheld tuner we take the new Terminator EFI system on a test drive!





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 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





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 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.





Installing A Manual Or Electric Choke On A Holley Carburetor
Installing an electric or manual choke can make engine start ups easier on your muscle car. These steps show how to install and adjust both types of chokes on just about any type of vehicle.





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