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How to de-bog your Quadrajet part 2

The Rochester Quadrajet has gotten a bad rap over the years, but it's actually an excellent carburetor once you understand how they work. Often referred to as "Quadrabog" or "Quadrajunk", many of the issues these units suffer stem from neglect, or "modifications" that do more harm than good. Being a spreadbore, air-valve secondary design, the Quadrajet is capable of flowing 750 or 800 cfm of airflow, eliminating the need to buy different carburetors when your set-up changes. In addition, the small primaries make for great drivability and fuel economy. In this clip, I'll discuss theory of operation on the secondary side, since that's where most problems arise. So, leave your preconceived notions at the door and let's see what makes these carburetors tick.


 


More Videos...


How to debog your Quadrajet part 3
In the first two videos we looked at operational theory of the Quadrajet. In this episode we'll explore a couple mistakes the home mechanic often makes in an effort to improve the performance of this unit.





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. Enjoy!





Replacing A Thousand Dollar Shock Absorber
Scotty Kilmer, mechanic for the last 46 years, shows there's actually a car with shock absorbers that cost over a thousand dollars Apiece. He also shows how to replace one in this video. And, If you like my car help, be sure to watch my live car talk show every Saturday morning at 10 AM CST on YouTube. I answer your car questions LIVE there. Just check it out at https://www.youtube.com/watch?v=VognjkYaMjg&list=UUuxpxCCevIlF-k-K5YU8XPA&f eature=c4-overview . And remember, every TUESDAY I upload a new video, so don't miss them.





how to minimize engine bog with a Quadrajet carb
this is to minimize engine bog when the pedal is to the metal. do not over tighten, very small spring...you want to try 1/4 turns or 1/2...q-jets are good if tuned properly. also when you are tightening screw it will have tension on it so keep the screwdriver firm. 1986 gmc sierra single straightpipe to cherrybomb. you will need a small flathead screwdriver and a 3/32 allen key. be sure not to tighten to much or else your vacuum secondary flaps wont open.





The Infamous Quadrajet Moan
Making a full-throttle pull on the chassis Dyno with our 1972 Pontiac Trans Am with 455 H.O. engine.





How to adjust carburetor mixture screws
Here's how to find and adjust the mixture screws on your carburetor. Note that metering-block style carbs such as Holley and Demon more often have one or 2 mixture screws in each metering block depending on the number of venturi. Also those may not be located at the bottom of the carb as in factory carburetors.





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





Edelbrock Carburetors - Additional Tuning
For additional tuning and adjusting, such as changing metering rods and jets, this video will guide you to make sure your carburetor performs as expected.





How To Set Ignition Timing
How to video by Lambs Auto Customs And Repair on how to set ignition timing.





How to Adjust the Secondary Air Flap on an Edelbrock Carburetor
Family owned and operated for over 40 years with over 75,000 satisfied customers. Rated #1 Click on blue link http://www.enginefactory.com/letters.htm How to Adjust the Secondary Air Flap on an Edelbrock Carburetor Produced by enginefactory.com Worlds leader in turn key muscle car engines.





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.





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





Quadrajet HP for $40.
A GEARHEAD PRODUCTION. Throw away the Edelbrock and the Holley and save your money. You can build a hp QJ for less, and get better performance and mpg too.





How to rebuild a Rochestor Quadrajet part 1
Introduction and beginning the disassembly process





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




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