Quadrajet disassembly part 2 ""SUBSCRIBE!!!!!""
disassembling my 750cfm q-jet, for more questions comments or information
feel free to email me! i have tons of quadrajet and holley parts too.. let
me know what you need!! Thanks for watching!
Rochester Quadrajet parts description and overhaul discussion
CARBURADOR MOTOSIERRA, AJUSTE, LIMPIEZA,REPARACION
EXPLICACIÓN PASO A PASO DE LA REPARACIÓN Y DE LA REGULACIÓN DE LA
CARBURACIÓN PARA UN CARBURADOR VALIDO PARA MOTO SIERRA, DESBROZADORA,
RECORTASETOS, ETC... CON DOS TORNILLOS DE REGULACIÓN ALTA(HIGH)
Rochester Quadrajet disassembly
Sorry about my raspy voice i had a killer cold! This video shows the basic
parts of the quadrajet.. feel free to email me for anymore information, i
have tons of spare Quadrajets and Holleys as well!! Thanks for watching!
Replacing an HEI Coil & Quadrajet Comments (Not a "How-to")
The '77 Olds 350 suddenly developed a pretty nasty miss under load, which
slowly worsened to a miss at idle too. If you got close to the distributor
with the engine running, you could hear the coil arcing all over the place!
The Delta is equipped with the usual GM HEI distributor.
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!
The last thing to be looked at on the wagon, but really, no old car project
is ever done, things keep being played with and adjusted. This is a
correct Rochester Quadrajet 4-barrel carburetor I got some time ago, and
has been renewed with new seals. The bushings and other hard parts were in
good repair, so with the new seals. T o note, I called out the first three
serial numbers as being "701" when in fact it starts with "704" . When
building up a Rochester, one has to understand they can't just throw parts
into it, they may be unhappy with the results. They should also be ready
to have to change a jet here, a metering rod there, a spring or two after
the unit is on to get the car running perfectly. The Quadrajet is a sweet
carburetor, once you understand it a bit. As I am doing. It is running
well, but will need a bit more tuning in the way of a stiffer primary
metering rod return spring. Other then that, the car has more bottom and
top end power, mid range is the same, but the bonus is, fuel mileage has
picked up, the leaky bowl of the old unit is gone!
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.
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 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
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