JDR 4412 Alcohol Carburetors

Spec 1
Designed for for classes that require a gauge legal 500 CFM carburetor, but allow alcohol. These feature stainless or plated parts for corrosion resistance, alcohol jets, blueprinting to maximum legal tolerances, and a fuel curve that provides sharp throttle response and power.

Spec 2 
Designed for classes that require a 500 2 BBL but allow alcohol and some visual modifications. These feature stainless or plated parts for corrosion resistance, alcohol jets, machine work to venturi, throttle shaft or boosters, and retain a 1 11/16″ throttle bore,

Spec 3 
Designed for open 2 BBL rule classes, or where rules allow the carb to be heavily modified. This can include machining venturis, boosters, throttle shaft, and throttle bore. These are “maximum gain” or “outlaw” type 2 BBL’s and take advantage of every modification that can be performed.

Spec 3 Extreme 
If you race in a class that requires a 2 BBL but will not be gauge checking the carburetor, this will give you what you’re looking for! This is the biggest, baddest, stock appearing 4412 on the market. A 1.750 throttle bore used to be the benchmark when it came to stock appearing “outlaw” 4412 carburetors. We’ve re-set the standard with these. With an even larger throttle bore, laser cut stainless steel throttle blades, and every flow enhancing modification that can be done, you’ll see a big increase in power over anything built for similar rules. Not only is the power there, the race track performance is unmatched. These are great on restarts and off the corners unlike some of the other “big” 4412 carbs that have been around for a while. No sacrifice, all gain!