#1901 Edelbrock Quadrajet Stage "2"

Carburetor Mike's Stage "2" Quadrajet This is my Stage 2 configuration of the Edelbrock Quadrajet #1901. Through trial and error I've dialed in the jetting and circuit timings especially for the Boss Hoss Motorcycle. The baseline Carburetor was a Edelbrock #1901 Quadrajet. It now has many modification which go way beyond a mere jetting change. This combination took a Dyno mounted Alum. 434 Small Block to an output of 485HP. The engine in this video, Is a ZZ4 with a larger than stock cam. Ported and Polished Heads, 1.6 Roller Rockers, Port match intake and headers. Those who have gotten one of these Stage 2 carbs. Report that their Bikes have never run like they do now. They report it has a better all around performance with an extremely sharp and crisp off Idle response, a strong W.O.T. and an increase in fuel mileage, from 4-6 MPG if they take it easy. I also have a combination for the Edelbrock #1910 that are mounted on the 502 cid Big Blocks. As you will see in the video. It is very important to have the choke wired open or a manual control on it, if left disconected the choke will fall in when you open it up. That is why it returned onto the fast idle the one time. These carbs would work well on any Hot Rod that has some gear in them. And with the stock Choke Pull-off they would run great on a stock car or truck as well. carburetor.mike@netzero.com

More Videos...

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

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.

The Quadrajet to Edelbrock carburetor swap - step by step
Replacing my old Rochester Quadrajet with an Edelbrock 1406 carburetor. This is a 1984 Chevy K20 3/4, just a yard truck for plowing my property. The old Quadrajet got gunked up from a broken fuel filter so I decided to try swapping on this old Edelbrock. I had pulled this Edelbrock off an El Camino with a 305 I had about 10 years ago and it has been sitting since. I popped the top and cleaned the inside, also flushed the passages with carb cleaner. Seems to run well. The Edelbrock 4bbl is not a direct bolt on to the stock intake manifold. It has a slightly wider bolt pattern and the shape of the openings is different. To facilitate installation I bought the Edelbrock adapter kit model 2696 which was less than $30. It includes the adapter plate, two gaskets, and mounting hardware. I also purchased for about $8 the Edelbrock 8009 throttle cable adapter kit which allows the stock GM throttle cable to interface easily to the Edelbrock caburator armature. The biggest adaption here was the fuel line. The Rochester Quadrajet has the fuel filter in the the front of the carburetor and is fed by a metal fuel line that threads in there. The Edelbrock's fuel inlet accepts a rubber line and is on the side towards the rear. I cut my metal fuel line and attached a rubber line to it with an inline fuel filter to the Edelbrock 1406. This seemed to work very well. I had to extend my PCV hose about an inch. This was easily done by cutting it and splicing with a piece of metal tubing. The brake Booster vacuum line on the rear of both carbs is identical and required no modification. Same with the distributor vacuum advance, same location on both carburetors. Parts Used: Edelbrock 2696 adapter plate kit Edelbrock 8009 throttle cable adapter Rubber fuel line Inline fuel filter Hose clamps Tools: Flat head screwdriver Phillips screw driver 5/8" tubing wrench (fuel line and brake Booster fitting) 1/2" wrench (carb mounting bolts) 3/4" wrench to swap brake Booster fitting Something to cut fuel lines with

Quadrajet Madness IR intake and 4 carburetor test driving and tuning
First series of test drives with the 4 carburetor setup. Many things learned from this experience!