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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!


 


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Decoding a Rochester Quadrajet part 2: Breaking down the numbers
In this clip we'll learn how to decipher the Identification number and julian date code on the Rochester Quadrajet.





Decoding a Rochester Quadrajet part 3: more practice with the numbers.
Here's one more video that will help you learn to decode the ID numbers found on the Rochester Quadrajet.





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





How to diagnose a Quadrajet part 3
Let's take a look inside





How to rebuild a Rochester Quadrajet part 3
Finishing up the disassembly.





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





How to diagnose a Quadrajet part 1
I get lots of questions about poor running issues. Here's how to check them out.





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.





Why Quadrajet's are awesome part 1





How to rebuild a Rochester Quadrajet part 4





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.





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





Identifying Quadrajet vacuum ports
I always see a lot of questions about what various vacuum ports do on a Quadrajet. Here's a general guide that will point you in the right direction. Remember that there were many different Qjets over the years and vacuum port locations and number will vary. This video is representative of 1975-90 carbs. Enjoy!





How to rebuild a Rochester Quadrajet part 2
Continuing the disassembly process.





Which car is faster? Which Car is Faster?




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