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Car Forum / Oldsmobile Cars / March 2004quadrajet verse edelbrock carb
i have a quadrajet carb on a olds 455 motor and was going to put a edelbrock 750 carb on it, the oldtimers that i talk to say keep the quadrajet and the younger guys say go with the edelbrock.. what is the pros and cons of each? i hear the quadrajet will get way better gas mileage. the motor is in a 58 buick special with no internal mods done to the motor. the only thing i will be changing is to a edelbrock performer intake. any help is appreciated on this matter Whaat are you looking to accomplish with the carb change? The q-jet is a good daily driver carb with small primaries which will offer some reasonable fuel economy at the sacrifice of some performance when running only on the primaries. The Edelbrock likely has equel, or close to it, size venturi's front to back, with total opening size larger than the q-jet, which will give more power when just running on the primaries and an increase in overall performance at WOT (wide open throttle). If there are no other mods and it's a Sunday driver I'd be inclined to stay with the q-jet and put the money into something else. FWIW, Steve G. > i have a quadrajet carb on a olds 455 motor and was going to put a edelbrock > 750 carb on it, the oldtimers that i talk to say keep the quadrajet and the [quoted text clipped - 3 lines] > be changing is to a edelbrock performer intake. any help is appreciated on > this matter Go with the Edelbrock carb. It's more of a performance carb than the Quadrajet. BTW, the 455 Olds V-8 in a 1958 Buick sounds like an inter- esting project. The motor was in the car when i bought it. I have no complaints and it has never had any problems so far. The only thing that I dont like is when you get in to it the carb on there now bogd down for a second and then kicks in. I already have the edelbrock bought but just wanted some opinions before I swap the quadrajet out > Go with the Edelbrock carb. It's more of a performance carb > than the Quadrajet. > BTW, the 455 Olds V-8 in a 1958 Buick sounds like an inter- > esting project. You could probably have eliminated the bog by adjusting the tension on the spring for the top plate on the secondaries. It's probably just coming in too fast. As to the edelbrock being a performance carb, I would suggest it's primarily marketing. The body and design of that Edelbrock carb is a Carter AFB, a high performance carb from the '60's used on the 340 hp 327's in the 62/63 Corvette. Q-jets were used on high performance GM's up to almost 400 horsepower. Carbs in general are old technology and haven't changed or improved much in the past 40 years anyways. If I wasn't going to upgrade to an electronic fuel injection system, I'd just tune-up the old q-jet and run with it. Steve > The motor was in the car when i bought it. I have no complaints and it has > never had any problems so far. The only thing that I dont like is when you [quoted text clipped - 5 lines] > > BTW, the 455 Olds V-8 in a 1958 Buick sounds like an inter- > > esting project. |
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