Hey guys,, Im running a q-jet on my 250,,,
Larry will tell ya, Ive been fighting this thing for years,,, Ive used the Rowe book,, way to confusing,, the book to get is by Cliff Ruggles, awesome guy and company,,cliffshighperformance, basically you got it,, two different bodies to support desired airflow,,,only the early actual muscle car quads (oldsmobiles) came with giant cfm/fuel metering capabilities and some of gm 454 /427's all others are pretty d-tuned by gm.. my carb is a b.o.p. so the fuel inlet is straight in not at a side entrance like chevy,, and the air valve is modified with a set screw, and the factory table is ground off,,,so it opens much larger than factory intended,, quadra-bog is usually never to much fuel as thought, it is not enough,,in addition to the amount the fly opens there is a spring below that changes the speed it opens,,according to the vacume being pulled through the venturie, that is the key,, open to fast and you dump air without the right fuel creating a lean spot (bog)open it to slow and you create a rich dog,,once the carb is metered for the fuel,,and when you get the air valve worked out the carb will run great,,, on the trek to our buddy freddys annual breakfast, the car knocked down 24 mpg cruising about at about 70,,,
