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How to rebuild a Rochester Quadrajet part 2

Continuing the disassembly process.


 


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





How to rebuild a Rochester Quadrajet part 4





How to rebuild a Rochester Quadrajet part 5





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





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.





New quadrajet set up
New air-gap manifold and custom/rebuilt q-jet. Sounds good but I still need to set the timing on the distributor and the carb is tuned already. Hope you like, nothing to fancy just a few revs and walk around...the Exhaust is true dual no x/h pipe and it has cherry bomb glasspacks(3 inch)





How to rebuild a Rochester Quadrajet part 10





750 vs. 800cfm Rochester Quadrajets-how to tell them apart
There exists a ton of misinformation regarding the actual airflow capacity of the Rochester Quadrajet. Not many people know how many variations there are or how to tell them apart. Here is a simple video explaining how to identify each size based on casting design. I will cover the "cfm-limited" carbs in a separate video.





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





finding top dead center .
this is to help out TheRickfix on using his chrome timing cover. This is how I go about locating TDC .





Understanding computer-controlled Quadrajets part 1 of 3
Here are a series of videos that talk about the E2ME/E4ME computer-controlled Dualjets and Quadrajets found on 80's GM products.





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





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.





Rochester 2-Barrel M2MC Carburetor Jan 15, 2011
Taking on the project of resurrecting a Rochester M2MC 2-Barrel carburetor for a vehicle a friend will be using in a demolition derby in February. The M2MC was brought forth as an economy oriented carburetor intended for smaller displacement engines in the late '70's - actually only a few years! GM kinda cheated on this project by using the front half (primaries) of a Quadrajet carburetor. The primaries on a Quadrajet are very tiny, meaning high air velocity, in conjunction with a metering rod system and triple venturi design assure top fuel efficiency. It comes at the expense the engine, especially the V8 offerings, would be a little restricted in the higher RPM ranges. In all honesty, the public had all but given up on 'performance' during that period. This particular example appears to have suffered from a little water getting into it while it was sitting off of a car a while ago. It will be cleaned before assemble with new gaskets, then adjusted after it is reassembled.





Which car is faster? Which Car is Faster?




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