So which one is it? -
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post #1 of 9 Old 02-19-2010, 12:02 PM Thread Starter
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1980 CJ7 
Join Date: Feb 2010
Location: Havasu
Posts: 243
So which one is it?

I'm new to the Jeep thing, and I have search and found mostly complaints about every carb out there. My question is which carb is the best setup for the 1980 258 6cylinder? Should I stick with stock, or lean another direction? This motor is well equipped, with headers, dual exhaust, MSD ignition etc. Just looking to replace the leaking POS carb ? Got any recommendations?

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post #2 of 9 Old 02-19-2010, 12:06 PM
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1976 CJ5 
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Location: White Oak, TX
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I would say that depends on how much $$$ you are willing to spend..... under $200 go with Motorcraft 2100... over $200.... Weber would be nice.....

1976 CJ5 - 232 I6, MC2100, YJ Booster, Front disc conv, 2.5" BDS, 1" Body Lift, .5" lift Daystar Shackles, 33 x 10.50 BF KM2, Twin Stick

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post #3 of 9 Old 02-19-2010, 12:09 PM
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1980 CJ7 
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I have the motorcraft and love it. After my buddy saw how well mine ran after I got it dialed in he had me install one on his YJ. Same 258s.

1980 CJ 7--3" Black Diamond, 1" body, locked both ends, 4.56, 35x12.50x15 SS LTB, "family" cage

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post #4 of 9 Old 02-19-2010, 01:10 PM
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1979 CJ7 
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Location: Mohave Valley,AZ
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I think you will find complaints about every carb setup out there. You will find complaints about carb setups in general (from F/I guys). It does come down to $$$$. If you have a large bankroll, go with MPFI; small amount of money, rebuild kit. If your carb isn't rebuildable, search the junkyards for replacement or a MC 2100.
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post #5 of 9 Old 02-19-2010, 01:13 PM Thread Starter
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1980 CJ7 
Join Date: Feb 2010
Location: Havasu
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Thanks guys, I do have plenty of weber running experience, with the Vdub motors, they can run rich however and do take some knowledge for proper jetting and tuning. I was just wondering what most people ran? Thanks
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post #6 of 9 Old 02-19-2010, 01:14 PM
Mike Romain
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1986 CJ7 
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Location: Off the Grid in Chester Grant
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Any old carb is problematic. A nice freshly kitted stock BBD runs very nicely, so does a new carb....

A kit for the BBD only runs in the $20.00 range and is easy to put in.

86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
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post #7 of 9 Old 02-19-2010, 01:44 PM
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At least with the '80 BBD there aren't any computer feedback controls on it. It's not a bad carb if set up correctly.
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post #8 of 9 Old 02-19-2010, 02:30 PM
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1974 CJ5 
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Location: Lorton
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The last new carbureted vehicle in America was sold around 1991. Close to 20 years ago. So if you're hearing a lot of complaints about carburetors from a group of internet Jeepers whose average age is probably around 25 I'm not surprised. The art and science of properly adjusting and tuning a carb is dying out.

The Motorcraft 2100 2bbl is probably the best and simplest carb swap for a stock 258. The rebuild kit runs about $20 and takes no more than 15 minutes to rebuild for an experience person. The carb is so simple it will literally run with the top cover removed, allowing you to adjust the floats with the engine running. In terms of simplicity, reliability and affordability it really has no match. In terms of off-road manners this carb is the next best thing to fuel injection. It simply will not flood at off-camber angles. I have been running one on my 258 for years and have ZERO complaints about it.

If I had to make a second choice, I would look for a Rochester 2GC, which was commonly used on GM V6's and V8's for decades (also called the 2 Jet) and the small flange version will bolt directly to your manifold since it shares the bolt pattern with the Carter BBD. These are also simple and reliable carbs but are less popular for 258 swaps for some reason.

My last choice would be the Weber just because it's so expensive. The EMPI knock-off is about $100 cheaper but is still beyond my price point. I prefer something I can pull from a junkyard for $25 or less. If I'm going to spend $300-400 on fuel delivery I'd much rather put that money toward fuel injection.

But if I were you the first thing I would do is get a rebuild kit for my BBD and see if I could get it running halfway decent without having to get rid of it. You'd be surprised what a difference a basic carb tune up can make.
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post #9 of 9 Old 02-19-2010, 03:46 PM
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1976 CJ7 
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my carter runs great. Gas mileage is about 11 city 16 hwy so that is horrible but it runs great. Idles super smooth starts up every time first crank. I certainly would not put that in if i were replacing it.

Disregard everything i say

I have a dana 30 front axle and amc 20 rear if anyone is looking. Both are 3.54, drums, narrowtrack.
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