2bbl

[DarkKnight]

Hey mang's Any of you able to tell me whats all needed to do a 2bbl swap from CFI?


ThaNks in advance :-D

[grandpaslincoln]

Forget the 2bbl and go straight to 4, unless you can find a 2bbl that isn't a piece of shit. This is just from my personal experience though.

[DarkKnight]

:-? Well i dont have the muscule for the 4bbl yet.. and prob never will So 2bbl will work for me seeing i want a dd instead of a HotRod atm..

Just yea getting one to work right is the trick...


And i have nern Exp. With Carbs. :-(

[Southern_Pride]

Ive got a good one somewhere. It bolts on your intake just need to modify the fuel system.

[1987cp]

Yep, should be pretty straightforward. Biggest concern is probably to swap out the high-pressure fuel pump for a low-pressure one.

Some guys claim a small 4V carb can get slightly better fuel economy than a 2V if you go easy on it and just drive around on the primaries, because the primaries on a 4V are smaller than the barrels on a simiarly-sized 2V. Plus, if you go aftermarket or buy a rebuild, a good 2V costs at least as much as an equivalent 3V. But of course, aside from swapping or adapting the intake, you might end up in a situation like me, trying to tune a carb leaner than the regular calibration kit allows for.

Whoops - I almost forgot. Does the CFI have a computer-controlled ignition that requires feedback from the throttle body? That could pose a complication as well, though the solution is equally straightforward.

[gadget73]

if you change it over, you'll need to modify the fuel system to remove the high pressure EFI stuff, and replace the ignition system since its also tied into the computer. Intake is actually about the only thing that does not need to change. You need a carb, some sort of TV setup, an ignition system, and modifications to the fuel lines. The TV setup can be either aftermarket, a carb from an 80-82 Vic with a 5.0 or you can come up with some sort of a lever on the side of the carb to operate the TV rod. There is a bit of wiring involved, and a lot of wiring removal. Once its all together, then you have to tune the carb and timing to make it run decent.

[1987cp]

Time for a Proform HEI!!

[Archangel]

Time for a Proform HEI!!

Haha, was just about to say that Also the cross-breed ignition might work well, to go around the Duraspark quirks: http://www.bronco.com/cms/node/25

[1987cp]

Haha, was just about to say that Also the cross-breed ignition might work well, to go around the Duraspark quirks: http://www.bronco.com/cms/node/25

Dude, that was my other line!

I do like my crossbred ignition pretty well so far, but I would have thought more seriously about the Proform if I hadn't wanted the look of a Ford distributor.

[Grandmarchris]

Not all 2bbl's are crap just get a Barry Grant Road Demon or Holley Keith Dorton short track carb

[DarkKnight]

good grief.. I was thinking a 2bbl would be easer.. but sounds like the same amount of shit.. Scues ma french...


So far though i havent even had time to get to advance Sooo. Still holding on this project.

[Southern_Pride]

Holley 2 barrel takes some creativity on the linkages. Ive done it. Plus it dumps a fuckton of gas on a stock motor.

[1987cp]

Holley 2 barrel takes some creativity on the linkages. Ive done it. Plus it dumps a fuckton of gas on a stock motor.

They're shipped with pretty fat jets, huh?

[Southern_Pride]

#74's Stock 302 takes about a #50 and that carb wont run that lean. Unfortunately with whatever the hell cam I have now and #80 jets Im running way to lean.