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.
here is a technique for re-bushing the throttle shaft without drilling.
How to de-bog your Quadrajet part 1
Sorry guys, I got the videos a bit out of order.
The Rochester Quadrajet has gotten a bad rap over the years, often called a
Quadrabog or Quadrajunk.
In fact, this is a great multipurpose carbureter once you understand how
they work and what not to do to them.
In this clip I introduce you to the Quadrajet and begin explaining the
theory of operation of these units.
Auto Repair & Maintenance : How to Adjust Carburetors
Idle speed and idle mixture are the two most common adjustments made to
carburetors, and these adjustments start by warming up the vehicle to full
engine-operating temperature. Find out how to perform a lean-drop
adjustment with help from an ASE-certified master automobile technician in
this free video on carburetors.
Expert: Clark Mason
Bio: Clark Mason is an ASE-certified master automobile technician.
Filmmaker: Christian Munoz-Donoso
Setting Curb Idle Speed of Carburetor Video -Holley Carb DVD
Buy the "Holley Installation & Tuning" DVD
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
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
Menus are full of bonus information and detailed animated tours of
internals and accessory kits.
Get the full DVD with all of the interactive menus, detailed animated tours
of internals and accessory kits here...
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
Sample clips on our YouTube page and at our store here...
BoxWrench.net is a community and resource designed for automotive
3 New Transmission DVDs and a Differential Rebuilding DVD just added.
BoxWrench on Facebook:
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.
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!