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Unread 07-22-2014, 02:21 PM   #1
83vert
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Replacing bbd to the newer bbd????

I am using the oem carb on my 82 but it is time for a rebuild, I have a newer bbd with the metering pins??? Can I just swap them out? Do I have to adjust those pins somehow? Thanks

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Unread 07-22-2014, 02:30 PM   #2
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image-2133072039.jpg

And should I drill out the tubes to .32?
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Unread 07-22-2014, 02:32 PM   #3
Mike Romain
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Quote:
Originally Posted by 83vert View Post
I am using the oem carb on my 82 but it is time for a rebuild, I have a newer bbd with the metering pins??? Can I just swap them out? Do I have to adjust those pins somehow? Thanks
You need to set the pins so they show 1/8" of shoulder before the point shows. But figure what "newer" means... The last Jeep BBD was made in 1990. 24 years ago. The odds are real high it needs a kit now too.

The kits are only $20.00 or so and aren't hard to put in. They come with good directions, just don't take anything apart you don't have to to clean it and use 2 wrenches when taking off and putting on the gas line. That is important. The brass fitting is the float adjustment and needs yo be held from moving.
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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
Some Canadian Bush Jeep Runs and Build Photos: http://mikeromainjeeptrips.shutterfly.com (10 new albums added Sept 16/10)
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Unread 07-22-2014, 02:33 PM   #4
Mike Romain
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Originally Posted by 83vert View Post

And should I drill out the tubes to .32?
I would.
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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
Some Canadian Bush Jeep Runs and Build Photos: http://mikeromainjeeptrips.shutterfly.com (10 new albums added Sept 16/10)
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Unread 07-22-2014, 02:34 PM   #5
83vert
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Thanks mike
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Unread 07-22-2014, 02:34 PM   #6
Mike Romain
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The choke looks seized on that carb, it should be closed.
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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
Some Canadian Bush Jeep Runs and Build Photos: http://mikeromainjeeptrips.shutterfly.com (10 new albums added Sept 16/10)
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Unread 07-22-2014, 03:06 PM   #7
83vert
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I opened it, popped the clip off the linkage to look down inside of it. I just ordered rebuild kit from napa and now in need to find that drill bit somewhere????
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Unread 07-22-2014, 03:11 PM   #8
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I opened it, popped the clip off the linkage to look down inside of it. I just ordered rebuild kit from napa and now in need to find that drill bit somewhere????
harbor freight sells a set of little drill bits. One of them is the size 32 you want.

I think i paid $7 for the set.. i think its 24 bits.
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Unread 07-22-2014, 03:13 PM   #9
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and are you looking for economy, or power? You get more power out of a motorcraft swap (at a loss of a bit of fuel economy).

If your ECU still works, you dont need to do anything with the metering pins... they are computer controlled. If you are nuttered or pre-ECU, set them to 1/8 inch out (I adjusted mine further out than that to get a leaner burn)....
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Unread 07-22-2014, 03:24 PM   #10
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I'm just looking for reliability, the jeep is an 82 so no ecu. I guess I will rebuild the original carb and hold onto this other one. The newer carb looks new though, got it off a parts jeep. image-3136298213.jpg image-598733890.jpg
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Unread 07-22-2014, 03:27 PM   #11
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This is on jeep now image-1509328039.jpg image-4079383806.jpg

image-2680305408.jpg
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Unread 07-22-2014, 04:17 PM   #12
Mike Romain
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Originally Posted by rbthompsonv View Post
. If you are nuttered or pre-ECU, set them to 1/8 inch out (I adjusted mine further out than that to get a leaner burn)....
Ok, you want to up your gas mileage, then set them back to the leaner 1/8" mark. Full in is full rich, full out is full lean. They are air bypass pins. :-)
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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
Some Canadian Bush Jeep Runs and Build Photos: http://mikeromainjeeptrips.shutterfly.com (10 new albums added Sept 16/10)
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Unread 07-22-2014, 04:20 PM   #13
Mike Romain
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This is on jeep now
I would rebuild that one if I had a choice which I recently did. Helped a friend do a mc2150 swap and he gave me one of those sweet things. 25 mpg with my 4.0 HO engine. He gets a nice 16....
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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
Some Canadian Bush Jeep Runs and Build Photos: http://mikeromainjeeptrips.shutterfly.com (10 new albums added Sept 16/10)
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Unread 07-22-2014, 06:03 PM   #14
rbthompsonv
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Originally Posted by Mike Romain View Post
I would rebuild that one if I had a choice which I recently did. Helped a friend do a mc2150 swap and he gave me one of those sweet things. 25 mpg with my 4.0 HO engine. He gets a nice 16....
Im with Mike on this one.. I would rebuild the carter (its incredibly easy to do).. Set your metering pins to roughly 1/8 inch out and fine tune with the A/F mixture screws (bottom front of carb) to get peak HP and best MPG...

MC swap can be a bit of a pain to get right (Ask me how I know )

I am actually thinking about going back to a Carter to see if i can eek out the legendary 25MPG Mike rants about (and swap to the MC for offroading... Also, wouldnt mind getting the ECU to function correctly.. )
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Unread 07-23-2014, 04:56 AM   #15
Mike Romain
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Quote:
Originally Posted by rbthompsonv View Post

Im with Mike on this one.. I would rebuild the carter (its incredibly easy to do).. Set your metering pins to roughly 1/8 inch out and fine tune with the A/F mixture screws (bottom front of carb) to get peak HP and best MPG...

MC swap can be a bit of a pain to get right (Ask me how I know )

I am actually thinking about going back to a Carter to see if i can eek out the legendary 25MPG Mike rants about (and swap to the MC for offroading... Also, wouldnt mind getting the ECU to function correctly.. )
I was recommending the older carb with no stepper motor by the way. And if you still have the ECU in there, you will never get the best out of an aftermarket carb. The ECU controls engine timing and needs the components all working to do its thing.

Several folks on here have gone back to the old style BBD from other carbs recently too. Like Keith460.
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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
Some Canadian Bush Jeep Runs and Build Photos: http://mikeromainjeeptrips.shutterfly.com (10 new albums added Sept 16/10)
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