2 barrel intake, 4 barrel carb pros/cons

[44BZ]

I learned this weekend that I have a 2 barrel intake with a 4 barrel carb and an adapter in between. Like the title says, what are the pros and cons of this setup?

[Ristow]

lousy airflow resulting in poor atomization retention,and poor velocity through the venturiis,poor economy.

no pros. it's a bad setup.

[tgreese]

...

no pros. it's a bad setup.

Yep. Only reason to do it would be if you had no other carburetor.

[44BZ]

So I guess I should find a decent 2 barrel carb? I understand the AMC 327 4 barrel intake is pretty hard to find....

[44BZ]

Also any suggestions on a replacement carb?

My plan was to rebuild the Edelbrock that was on it, but since I have it off and it's a less than desireable setup it doesn't make much sense to put it back on there

[ricdiculous]

lemme know if you wanna sell your 4bbl carb.

dunno how hard it is to find parts for the 327, i'm a 360 and 258 guy.

[Great Pharoah]

Yoy could go with the Holly 2300 500cfm two barrel. That is almost as much cfm as a small four barrel, and if you have the stock cam a 500 deuce is all you need anyway. With the stock cam your engine will not suck in enough mixture to make a four barrel worthwhile, not on an AMC 327. I know there were four barrel versions of that motor, my 59 Ambassador had one, but lots of luck trying to find a four barrel intake now.

[PlasticBoob]

Yoy could go with the Holly 2300 500cfm two barrel. That is almost as much cfm as a small four barrel, and if you have the stock cam a 500 deuce is all you need anyway. With the stock cam your engine will not suck in enough mixture to make a four barrel worthwhile, not on an AMC 327. I know there were four barrel versions of that motor, my 59 Ambassador had one, but lots of luck trying to find a four barrel intake now.

This is a GREAT carb. Might even be a bit too much for a stock low-revving 327, don't know too much about those engines.

[44BZ]

Yoy could go with the Holly 2300 500cfm two barrel.

I was actually looking at this carb on the Summit Racing website. I don't know much about carburetors as I've never owned a carbureted vehicle prior to my Jtruck. How do I go about matching the right carb to my motor? I also saw the same carb in a 350cfm flavor...How will the 500 vs 350 translate to engine performance?

[tgreese]

I'm not a big fan of the 2300 for off-road use. IME they are great on the street, but are terrible on steep hills or broken terrain. They flood out and stall, or simply won't run at certain angles. They can be set up to work ok (with adding several accessory parts), but you'd be better off with a carburetor that already runs well on the trail.

They also get lousy mileage.

Re the 500 v. the 350, the 500 will be better at WOT (wide open throttle), but the 350 will give you better fuel control at low speed and potentially better economy. But I would not buy either of them for this application.

If you can't find the original carburetor, I suggest you get a Motorcraft 2100 or 2150. It has the same base pattern as the Holley, and will work for any application that the Holley will. The 21xx is simple, reliable, and excellent on the trail.

[44BZ]

I've only found Holley and Rochester carbs for stock replacements. Is the Motorcraft considered an aftermarket piece? What vehicle can I find the Motorcraft on?

Thanks for all the suggestions by the way. The assistance is greatly appreciated

[tgreese]

You would have to buy a remanufactured Motorcraft; they aren't being made anymore.

This guy on eBay sells a lot of them. He has a great reputation too. http://cgi.ebay.com/ebaymotors/Motor...item4aa5659da3

You could send him an email and see if he'll work with you.

The only other sources are from a junkyard, or a carburetor rebuilder.

Jeep used them with CJs, Commandos and FSJs for many years - maybe someone here has a used one that you could rebuild. They were also used on many thousands of small-block Fords in the '70s.

[rustywagoneers_com]

My comments are directed toward Q-jet swapping, but I am not anti-adapter-usage; though I am in a minority.

http://www.ifsja.org/forums/vb/showthread.php?t=84718

[68_Gladiator]

I have a lot of 327 parts including the stock carb with a rebuild a year ago. Let me know if your interested. And as far as off-roading I've never had a problem with it and iv gone up hills steeper than id care to do again. It's great imo

[tgreese]

I have a lot of 327 parts including the stock carb with a rebuild a year ago. Let me know if your interested. And as far as off-roading I've never had a problem with it and iv gone up hills steeper than id care to do again. It's great imo

That would be your best choice, IMO.

The aftermarket 2300 is set up for flat track racing ... center pivot float, low bowl vents, no slosh baffles, etc. etc. The factory carb /should/ be an entirely different story.