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stodg73 09-05-2011 09:58 AM

Best way to fix a BBD?
What is the best way to fix a Carter BBD carburetor?



If replacement use?
Weber 32/36 DGEV
Weber 38/38 DGES

This is going to be a daily driver, so I need some power and fuel mileage.

Thanks in advance, stodg!

walkerhoundvm 09-05-2011 10:04 AM

Where are you in CO? TBI could be a consideration.

I see BFH isn't on the list.

CJ7-Tim 09-05-2011 10:07 AM

BFH or 12 gauge. If you re-build a BBD, it still is a POS BBD.

Ford MC2100 or 2150. Cheaper, available everywhere, easy to rebuild, easier to tune than a Weber. The 32/36 is perfect for a street Jeep, it sucks on the 4x4 trails. On inclines the 32/36 suffers from float bowl overflow that runs right into the intake and stalls the engine.

stodg73 09-05-2011 10:08 AM

Trinidad, and I don't know anything about the BFH(Big Freaking Hammer). Big time brain fart. Thanks.

walkerhoundvm 09-05-2011 10:50 AM

Replace it with either the 2150 or TBI.

The 2150, as Tim mentioned, is fairly easy to work on and rebuild if necessary. It has an internal mechanism to adjust to wide changes in elevation - like you could easily do by driving west a few miles. The 2150 won't fly in emissions areas of CO, which you don't have to worry about currently, but a future owner might.

The TBI takes all your worries about elevation, pitch, and emissions away, but is a bit more expensive, depending on if you go with a kit or junkyard build. You'll be getting about as good as you can get in terms of mpgs, but still not much better than a freshly rebuilt carb with fully intact emissions components. You'll up the value of your CJ a touch - not nearly as much as the cost of the kit, but a touch.

Mike Romain 09-05-2011 12:41 PM

They rebuild easily with a $15.00 kit and then just purr while giving great gas mileage. I even have mine on my 'new' 4.0 HO engine and it gives me a sweet 24 mpg mixed driving. On my 258 I got a steady 21 highway fully loaded.

Here is how mine runs with 91 octane ESSO gas and the timing set at 8-9 BTDC using the stock carb, OEM cap, rotor and wires and an Accel coil with 3.31 gears turning 33's. (while still passing emissions and giving 21 mph highway) Computer disabled on the old 258.

1st lights up the 33's 'way' too easy off a stop. 2nd hauls fast to 52 mph@4400 rpm. 3rd pulls hard to 75 mph. 4th buries the speedometer and I have 'no' urge to find out how fast 5th will go.... It also will crawl up a sand pit wall or ravine wall at 400 rpm without a chug, get too steep and it just churns the tires in...

stodg73 09-08-2011 09:07 AM

For more responses.

CSP 09-08-2011 10:32 AM

Replace with MC2100 or 2150.

There's a guy in Colorado Springs selling them ready to go on eBay. You'll pay more than you would in an auto parts store, but everything is included in his kit and they are jetted correctly for an AMC six cylinder.

bkeese 09-08-2011 10:59 AM

I have not seen a BBD that didn't need bushings on the throttle shaft (major air leak & bad idle). If you bush it it will perform nicely.

CJunk 09-08-2011 05:04 PM

I bought a bbd from summit. Holley rebuilds them. The only problem I've ever had with it, is a piece of sand got in one of the air tubes- easy fix. (we have big grains of beach sand here)

tdkask 09-08-2011 05:21 PM

As mentioned, but to add my vote, go to the MC2100/2150. I don't have to worry about emissions so put a 2100 off of a '73 CJ5 w/304 onto my '80 CJ7 w/258. Super easy. Also between that and HEI upgrade I have noticeably more power. There are tons of write-ups online. Search "258 motorcraft 2100 2150".

Matt1981CJ7 09-08-2011 05:39 PM

I got fed up with trying to fix my BBD and went with the Weber 32/36.

It was pretty much plug and play, and I'm very pleased with the performance.


tdkask 09-08-2011 05:58 PM

I started out trying the Weber 34DEG... either I was really horrible at installing it or it was a PITA. Either way, I didn't want to go through the process of trying to rejet, etc... and got a deal on the 2100... and am glad.

BagusJeep 09-08-2011 06:38 PM

I rebuilt the original BBD and after 30 years of hard use it is still sweet.

My wife has a 40 Weber from a Ferrari Daytona on her manifold and it is fine but I struggle to see a real life difference.

I go with try to rebuild every time, bushings if needed. If uneconomic to repair than I would consider buying a second hand one from someone who has chopped it for a Weber without trying to fix it. Jeez, not many 30 year old devices still working.

tdkask 09-08-2011 07:03 PM

I just hated the idle tube issues and constant aggravation. I understand that they worked for 30 years, but mine always had problems. Since my swap (only 3 months ago) I have driven my CJ every day but 3 and have not had to touch the carb for any reason. Also, I can now pass people on the highway and accelerate to to speed (probably not more than 80... haha) reasonably with stock gears and 33's.

The time now is 06:52 PM.

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