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P1010231.MOV

Rochester on 253 let the secondaries open


 


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Quadrajet sound
Q jet secondary operation





High speed idle cam discussion
Here's a look at where and how to adjust the high speed idle cam's adjustment.





1984 Chevy K20 50 to 70 mph
Punch it! I love to ear those secondaries open up on a four barrel carb. This truck reminds me of the sounds used in a lot of 80's tv shows and movies with car chases. I love it!





How to adjust a Chevy Edelbrock Carburetor, and Timing Adjustments - Technical Help Video 4
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 Chevy technical help video for carb and timing adjustments on live running engine, produced by enginefactory.com Home of the most complete Live Run Turn Key Crate Engines. Chevy and Ford Performance engine.





86 Monte Carlo SS - cleaning out the Quadrajet carb and flowmaster exhaust sound
This engine was pulled from the car in 1997 and left sitting in a crate until 2011. They left the fuel in the carb so as it evaporated it left deposits. Exhaust sound at 9:01 3 chamber Flowmasters, long tube headers. 2.25" pipes and I don't think there is a crossover tube.





Quadrajet Electronic Carburetor Rebuild - Teardown Part 1
http://www.carburetor-parts.com. Mike's Carburetor Parts has provided this video about the Rochester Quadrajet, electronic version. Part 1 of the tear down video.





Rochester Quadrajet, the results!
Two mishaps, the first shown here, the choke coil I got was wound backwards, it made the choke butterfly wind up TIGHTER as the engine warmed up. I swapped on the one from the old carburetor fast enough, the second mishap made me feel like a crud and what did I mess up later that evening. The car would not start leaving the Etobicoke -Queensway show. It was not getting gas. We got it running by priming the carburetor, and boy, was I ticked at myself. In the end it was not my fault it looks like. The new accelerator pump umbrella and rod was a very poor and frail design, the umbrella came detached and stayed at the bottom of the of the pump well, and was a distressed mess. The maker will get a note from me. The upshot? The old assembly went in, all is perfectly fine, the slight tip-in hesitation is gone now too. Stupid lack of pride it seems these days making parts for even simple things like an old carburetor.





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!





tq-issues-shorter.mp4
Issues with my thermoquad rebuild. Instruction sheet doesn't quite match the carb, which it never does....





Q-jet overhaul
Rochester Quadrajet parts description and overhaul discussion





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!





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.





Demon Carburetor
A clip of my new Demon carburetor and a few of the issues I'm having with it.





FLOOR IT!
1984 Chevrolet 3/4 ton 4x4, stock 350 (M code engine- 160 HP) with a quadrajet 4 barrel, stock turbo 400, 3.73 gearing and 33x11.50 (285/75R16) rubber.





Cold Start video 3
An inside view of the carb during a cold start hope you like it if ya do subscribe




Which car is faster? Which Car is Faster?





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