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.
Identifying Quadrajet vacuum ports
I always see a lot of questions about what various vacuum ports do on a
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
How to adjust Quadrajet/Dualjet fast idle
Quadrajet/Dualjet Rochesters have a fast idle adjustment screw that is
separate from the base idle screw.
Here's how to locate it.
Note: Ever since Charter "fixed" my internet and cable after the lightning
strike, it hasn't worked right. Go figure. So, if you see this posted then
I was finally successful in getting a video uploaded.
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.
1970 Pontiac GTO STK 89-ATL.mpg
WOW is the under-statement of the year when trying to describe this
gorgeous 455 H.O. 4 speed 1970 Pontiac GTO. Professional frame-off
restoration brought this ride back to absolute original condition. This
baby is ready for your next show, cruise-in, or just a Sunday afternoon
This original GTO is one of a total of 7088 GTO's built with 455ci engines,
which includes all years or production, 1970-74. The 1970 year production
is the only high compression, 10.25:1, 455's made for the GTO. Producing
370hp, ground pounding 500ft-lbs of torque, these high output GTOs were and
still are an absolute blast to drive. Equipped as you could have ordered
one, besides the beast of an engine, this GTO boasts a Rochester Quadrajet
carburetor, 4-speed M-21 (close ratio) transmission, dual Exhaust, 12 bolt 3.31:1 Saf-T-Trac rear end,
power steering, power front disc brakes with rear drum brakes, deluxe AM
pushbutton radio and rear window fan defrost system. Among other options
such as two-speed windshield wiper/washer, front bucket seats with
shoulder/seat belts, rear seat belts, console, clock, Rallye gauge cluster,
courtesy lights, remote driver's mirror and even an electric trunk release.
Wrapping your fingers around the factory wood-sport steering wheel and
looking through the front windshield at the hood mounted tach as you push
the accelerator, you'll be wishing the road never ends. 15x7 Rallye II
wheels wrapped in radial tires with the original 14x6 wheels available keep
you planted to the road. The great Exhaust note is achieved through the custom 2
1/2" tubes with an x-crossover connection and 2-chamber Flowmaster mufflers
with resonators. The temp gauge closes out the modifications done to the
car yet the original in-dash temp gauge system is still good. This factory
Polar White GTO with the optional '69 Judge stripes add to the definite GTO
muscle look. This girl is ready to go and we think your garage is begging
for her to call your place home.
1972 Pontiac GTO 455 FOR SALE flemings ultimate garage
1 of only 235 built! Matching #'s 455cid big block V-8 - YC code, turbo 400 automatic, 12 bolt Saf-T-Trak posi rear,
brand new Orange Flame paint, black bucket seat interior, factory console
with Hurst his/hers shifter, new Rally II wheels w/ BFG radial T/A's, great
sounding new dual Exhaust, new glass,
all new interior, Endura front bumper, ram air hood, fast ratio power
steering, beautifully restored, window sticker/ PHS docs, ultra rare, Just
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.
Auto Repair & Maintenance : How to Adjust Carburetors
Idle speed and idle mixture are the two most common adjustments made to
carburetors, and these adjustments start by warming up the vehicle to full
engine-operating temperature. Find out how to perform a lean-drop
adjustment with help from an ASE-certified master automobile technician in
this free video on carburetors.
Expert: Clark Mason
Bio: Clark Mason is an ASE-certified master automobile technician.
Filmmaker: Christian Munoz-Donoso