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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





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 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.





How to Use a Vacuum Gauge for Diagnostics
Back in the day a vacuum gauge was the primary diagnostic tool for your engine. Over time the vacuum gauge and how to use it have been forgotten. In this video our Moss Motors tech department gives insight and testing procedures on how to use this simple tool.





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





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





Holley 4150 carb rebuild: tuning
Holley 4150 double pumper carburetor tuning. Part 4 of 4 part series: Parts Used: http://youtu.be/cwa_DylnJVg Disassembly: http://youtu.be/inuxfloUT8k Assembly: http://youtu.be/P7GX82ljmxg Tuning: http://youtu.be/mpV1Vg9syk0





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 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





Quick Start Tuning
Footage from Holley Carburetor Installation & Tuning DVD





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.





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..."





Tuning on the Road with Holley - HOT ROD Unlimited Episode 14
On this episode of HOT ROD Unlimited, HOT ROD's Mike Finnegan visits with Holley Performance Products during the 2012 HOT ROD Power Tour, where 3 participants were chosen to have their cars custom tuned on the road by Holley's experts. HOT ROD Unlimited appears every other Friday on the new Motor Trend channel. http://www.youtube.com/motortrend Subscribe now to make sure you're in on all the action! http://www.youtube.com/subscription_center?add_user=motortrend Facebook - http://facebook.com/motortrendmag & http://facebook.com/hotrodmag Twitter - http://twitter.com/motortrend Google+ - https://plus.google.com/101867967859016552744/posts Website - http://www.motortrend.com & http://www.hotrod.com





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