Will a 4 barrel get better gas mi than a 2 barrel?

Answer 1

Generally the primaries (2 of the 4 barrels) on a 4 barrel are smaller than a 2 barrel. So if you never depress the pedal far enough to open the secondaries then it is quite possible to get better mileage. (note: jetting makes a difference) Who ever drives like that? So in this vane it's possible but highly unlikely

Also replacing a very old 2 barrel with a new 4 barrel can help as you are taking advantage of 20,30 or more years of technology. Usually the intake is replaced too and newer manifolds make more efficient use of fuel. So if you drive conservatively in this situation it is very possible to get better mileage. But then who drives conservatively?

I had a 76 mustang with a 302 that i replaced the old 2 barrel 250cfm carb and intake with a new holly intake and an edelbrock 625cmf carb. I got way better mileage, untill i stuck my foot in it that is.

Answer 2

2

Answer 3

a 4 barrel may get better milage than a 2 barrel especially if you get a good 4 barrel with a performance intake. Just keep the secondaries closed(keep your foot out of it) and it should be close if not better.

Answer 4

they are the exact same...unless you are flooring it. the only time all four barrells on a 4 barrell carb are open is when the car is floored. other than that, it only runs on two barrells. looks like the majority of your answers so far are wrong.

Answer 5

4 barrel = more power but drinks the gas

2 barrel = better on fuel but less power

Answer 6

no, in fact it will get less milage, asit is using more gas

Answer 7

no,, especially if you have a heavy foot !!!

Answer 8

**** no