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Q-jet overhaul

Rochester Quadrajet parts description and overhaul discussion


 


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re-jet your Quadrajet (part 1)
rejetting a quadrajet





Quadrajet parts description ""subscribe!!""
Home sick today...figured id do another instructional video on my q-jet





for Tim - Rochester tips





Quadrajet air leak fix and warped air horn repair tutorial.
How to identify a Quadrajet with a warped air horn without diss assembly or running it on a car. These tips would have saved me time and money which is why I made this video. I also discus how to repair a warped air horn and prevent your air horn from warping in the first place. If you have a whistling noise just off idle then you got some work to do. You will never get your engine tuned right, your cold start performing or decent fuel economy unless your four barrel carburetor is just right. Special thanks to Cliff Ruggles for his book Rochester Quadrajet carburetors and to my brother Adrian who spent hours on tuning and fitting. See this video for description of the technique I used to straighten a warped air horn. http://www.youtube.com/watch?v=l_SgQiVf3_0&feature=youtu.be here is a technique for re-bushing the throttle shaft without drilling. http://rmcavoy.freeshell.org/Q_Jet_bushings.html





re-jet your Quadrajet (part 2)
rejetting a Quadrajet





1977 El camino carb and REV!!!!
i rebuilt my quadrajet 4 barrel and it ran so well that i had to rev it for you comment me and tell me if u like it





Rochester QuadraJet M4ML
Quadrajet that i tweaked on a HDT VH Commodore - fast acting secondaries.





Decoding a Rochester Quadrajet part 1: The name
Rochester Quadrajets tend to mystify people because of the various model names assigned to them by GM. Add to that a redesign in the '70s and the confusion only grows. In this video we'll learn the different model names and also how to differentiate between early and later-model Qjets. Enjoy!





More Quadrajet tuning, some things! Part one in this saga on Sept 13, 2010
The car has a slight stumble and surge at a light throttle cruise at about 55 to 60 MPH. By swapping out the .050 metering rods to .048 units, the stumble and driveability concerns are now gone. Going richer would mean worse fuel mileage one may think? No! Now that the mixture is right, LESS throttle opening is needed now, which means higher vacuum, and this way the metering rods will block off the correct amount of fuel, and in the proper timing and percentages, so the car runs much smoother. As stated many times, patience and reading up on, and understanding how these intricate carburetors work will help out very much! Enjoy!





quadrajet-cam
See 1976 Chevrolet pickup with Rochester quadrajet upgrade on SBC 350 V8. We removed the hood, mounted a camera looking down on the air horn, and took it for a spin, running wide open on an uphill grade. See how the secondary air valve responds to rpm drop at each upshift of the THM. Also included is a smoking burnout.





How to adjust Quadrajet secondary air doors
These take some trial and error to get them adjusted so that there is no bog, but it's not hard to do-here's how.





More Quadrajet tuning, some things! Part two in this Saga Sept 13, 2010
With the camera sitting on the oil filler cap a few more things to show how a metering rod system works on a carburetor. The car has a slight stumble and surge at a light throttle cruise at about 55 to 60 MPH. By swapping out the .050 metering rods to .048 units, the stumble and driveability concerns are now gone. Going richer would mean worse fuel mileage one may think? No! Now that the mixture is right, LESS throttle opening is needed now, which means higher vacuum, and this way the metering rods will block off the correct amount of fuel, and in the proper timing and percentages, so the car runs much smoother. As stated many times, patience and reading up on, and understanding how these intricate carburetors work will help out very much! Enjoy!





Setting Curb Idle Speed of Carburetor Video -Holley Carb DVD
Buy the "Holley Installation & Tuning" DVD http://store.boxwrench.net/Holley-Install-Tuning-DVD_p_0-12.html Holley Installation & Tuning DVD: Curb Idle Speed Screw Here we show you how to properly adjust the curb idle speed on your Holley carb. First find your idle RPM setting from under your hood or from a repair manual. Turning the screw clockwise will raise the RPM's and counter clockwise will lower the RPM's. Check and adjust until the proper setting is reached. If you buy a brand new Holley 4-barrel, this DVD now comes in the box with every purchase. If you already own a Holley carburetor or would like to learn about the internals of the all-time, most popular modular style carburetor, this is the DVD for you. It's the ultimate installation, tuning and troubleshooting guide for the Holley modular style carburetor. This disc will also help tune and troubleshoot any other brand of modular style and some one-piece style carburetors. Menus are full of bonus information and detailed animated tours of carburetor internals and accessory kits. Get the full DVD with all of the interactive menus, detailed animated tours of internals and accessory kits here... http://store.boxwrench.net/Holley-Install-Tuning-DVD_p_0-12.html Don't forget our Basic Engine Building DVD. This video is great for people interested in car repair, car care, and restoration. As well as hot rods, muscle cars, performance parts, and Boosting horsepower. It can also help you to gain knowledge for increasing fuel economy, how to lower your emissions, and covers preventative maintenance to avoid little things like overheating. Sample clips on our YouTube page and at our store here... http://store.boxwrench.net/Basic-Engine-Building-DVD_p_14-8.html BoxWrench.net is a community and resource designed for automotive enthusiasts. 3 New Transmission DVDs and a Differential Rebuilding DVD just added. BoxWrench Store: http://store.boxwrench.net/ BoxWrench on Facebook: http://www.facebook.com/boxwrench





Rochester Quadrajet disassembly
http://www.beeterolds@yahoo.com Sorry about my raspy voice i had a killer cold! This video shows the basic parts of the quadrajet.. feel free to email me for anymore information, i have tons of spare Quadrajets and Holleys as well!! Thanks for watching!





Quadrajet disassembly part 2 ""SUBSCRIBE!!!!!""
http://www.beeterolds@yahoo.com disassembling my 750cfm q-jet, for more questions comments or information feel free to email me! i have tons of quadrajet and holley parts too.. let me know what you need!! Thanks for watching!





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