Quote:
Originally Posted by northboundtrain
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I've thought about 2-barrel carbs too, but I need to understand the theory behind why 2-barrel would be more efficient. At part throttle, isn't a 4-barrel effectively a 2-barrel with even smaller barrels? Would a 2-barrel be more efficient at WOT, but not necessarily otherwise?
I also want the ability to tow with this truck, so there may be times when I need four barrels.
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Yes, 4bbs are essentially 2bbs at part throttle. Barrel size varies, spread bores have smaller primaries than square bores. From what I remember, the Q-Jet primaries are significantly smaller than the 2bbl barrels.
It's been forevah since I've driven other 4bbls, but on my Q-Jet I can feel a difference in the pedal when the secondaries are opening. The springs on the 2ndaries are fairly strong on my carb, so I can tell obviously when they're opening.
Helps keep you out of them if needed.