remember the old chevy caprice with the 400 sb with a rodchester 2v?..if this is a cruiser style boat its a fact that a 2v carberator has more torqur on the bottom end then a 4v carb..i just built a 383 for a friend of mine for his late modle stock car..he had C&S specialties build him a carb that flowed 650 cfm..you might want to give them a call and see what they can bucks on a carberator..do for you..but your going to spend 750.00 on that carb but well worth it..

http://www.candsspecialties.com/

Excuse the French, but what the hell is the fascination with a 2bbl ?

Only time we run them in a performance application is when rules dictate it !

It has absolutely no benefit for freakin fuel mileage other than reducing the performance of the engine !

If you want to reduce the performance of a new engine build, why spend extra money on that engine for performance parts ?

I must say now - WTF guys ?

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I have a quazzillion of hrs on the dyno and track with performance 2bbl motors. Why ? 2bbl carbs reduce engine power to a huge extent and it takes time/$$$/knowledge/and stupidity to make some power back.

Why again ? Rules ! if it weren't for performance decreasing rules forcing the use of 2bbls, we/I wouldn't have gone thru all of this.

This thread is getting frustrating and comical at the same time. Okay, not getting, as it started out this way, but why is it still going on ?

If you count 2500rpm-3000rpm as low end torque (I do as this is where most I/O boats plane) I will totally kick your 2bbl motors azz with a 4bbl. 100% ! I've shown this to many people live - especially those that think the 2nd barrels don't open up this low...even on a stock Merc engine with quadrajet.

The difference is massive !

I have the boat and the resources.

Bring it on !

I'd love for this thread and subject to end.

LOL.

BTW: i'm not pisses, if it sounds that way, just frustrated you guys are still carrying on about this insane subject.

BTW: The 650 cfm 2bbl carb was bought/used because of rules saying that you have to have a 2bbl carb.

If you didn't have this rule, what power/fuel effeciency benefit would you have over a 4bbl carb from same company that flowed the same ? None ! In fact, the 4bbl will have smaller throttle bores / venturi's then a comparable cfm 2bbl. Plus, you can tune opening rate of the secondaries.....and because of this probably get a better fuel curve out of the 4bbl.

Wow SB.. Too much red bull or something.. This is my thread and its a discussion of what is possible not what is better. Why a 2bbl.. Because I already have one.. If I really wanted to start spending big bucks, I would go Fuel Injection and **** can the carbs.. But thats a different subject. I am sure there are tons of people out there with a 305 -350 small block and 2 bbl carb that would love to see what power it makes if they slapped it on a 383. SB I might even buy one of your spacers off your web site if you kiss and make up...lol...

Chris

sb is giving you good advice,listen to him but forget about kissing him.lol.

I was thinking about putting a single barrel rochester off a 1966 Chevelle Malibu straight 6 250ci onto a 540ci marine engine, mostly for fuel economy. I would be looking for lots of low end torque and I hear a single barrel is where its at. Thoughts SB?

Just kidding guys, continue on

i like that idea,i think i will dump the 2 1050 on my 588 whippel engines and get a pair of carbs from a 1979 chevy caprice 307 2 bbl carbs,bet the torque will be tremendous!but the most important thing will be the gas mileage because that,s why i have these engines,gas mileage and low end torque.

So this is what offshore only has come to. Cruiser owners arguing 2 barrel vs 4 barrel. Did I just go 88.8 mph and end up in 1955?

2 barrel carbs.......they should come with a coupon for 50 cents off a box of tampons and a Ford pinto wall poster.

Can I run a two barrel on this ? I like turtles .

Yes ! Keep the 1bbl / 2bbl on big motors coming !

You are onto something !