evenin yall. right now ive got a 283 out of an impala w/2bl. what kind of performance can i expect changing to a 4bl on a decent intake? thanks. g.t.
4 barrel carb. will increase your horse power on your 283,but you will use more gas and your gas milage goes down with 4 barrel personally I swiched to a 4 barrel carb. on my new 283 and Ill never go back to a 2 barrel ..
If you go with a good quadrajet and keep your foot out of it............you should get better mileage than the larger primary 2bbl. Keep in mind your cam lobes are for a 2bbl too. You will get a boost in performance still.
That's how it worked for me too. MPG actually increased with a 4 barrel. But,, I'm no kid either.. The only time the secondaries kicked in was getting on the freeway... Val
What kind of MPG do you get with your 4BL? I have a 305 with a 4BL i don't get on the Hiway all in town driving and get about 120 miles to a tank full.
ive got a 3.73 rear end out of a 70 1/2 ton. 3000 rpm at 65mph!!! im goin with a 700r4 asap... thanks for the input yall
I have a heavy foot most of the time 2BBL carb suck gas and wast gas copared to a 4BBL carb as long as you keep on the primary side. You can play with the linkage to open the 4 BBL's at a higher rpm ( a more floored peddle ) if your want try a little hard to help save gas. As said look at the size of the primary on the two carbs see how small the 4BBL primary are . The thing about the 2BBL it will keep throwing gas even when it not burning it will try to give more then needs at full floored. I seem $20. a week my self over 2BBL even with a heavy foot. I would never use a 2BBL carb again.
