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All my buddies are performance guys, but performance trucks. I'm about snort when I need it and economy when I don't. In comes the Q-Jet. With my Holley on my Bel-Air, I got 6 mpg, and with the Q-Jet, I was up to 20.
Yea Tom, the Quadrajet is a classic carb. I eventually changed to a Holley smoothbore that bolted on to the stock manifold. Better performance but much worse fuel mileage. The Quadrajet had small primaries with large vacuum operated secondaries, so it sipped gas when your were light on the throttle, but fed the engine plenty of fuel when you got on it. The Holley had four equally sized barrels with mechanically linked secondaries. It used more fuel even when taking it easy, the price you paid for better performance. Of course, this was in 1975 so gas was what, 60 or 70 cents a gallon back then?