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Old 02-13-2012, 05:14 PM
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mav1320 is on a distinguished road
weber carb upgrade

I am in the process of building a 87 YJ with a 4.2. It currently has the stock 2bbl carb with 130,000 miles. If I set the idle to where it's supposed to be it stalls when in gear. if i raise the idle it doesn't stall but all in all it just runs like a bag of snot. carb has seen better days. Since I have to change the exhaust/intake gasket I figured I would do the weber carb upgrade that I keep hearing about. So far I havent heard anything negative about them.

My question is.... What would be the better choice? The weber 32/36 or the weber 38 dges. This is a spare vehicle and being built for a toy. What is the pros and cons of the two? gas milage is not a concern would rather have a bit more power but most of all want it to run smooth. Any insite would be greatly appreciated......

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Old 04-10-2012, 02:42 PM   #2
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Probably rather late

but there are several threads on this forum about Webers gasping about halfway through a moderate acceleration.
Weber carb secodaries not enough gas???

I have the same issue with a 34 DGEC, although I'm not sure how much is due to my cat likely being a solid block of charcoal after my pouring excess gas down the carb throat during installation (stupidity happens, especially since replacing the carb was the first thing of any complexity I'd ever done to a vehicle)--I know for certain the valves had 1/4" of charcoal on them and I had to get the head remachined.

If I had the money, I'd be tempted to do a Howell (I think) throttle-body injection mod. If I REALLY had the money, they have multiport injection mods too. (Or heck, someday, I could put a 4.0 in the thing, probably when I replace the automagic transmission.)

Others seem to think that the Motorcraft MC 2100/2150 walks on water, makes a mean cup of coffee, and balances the federal budget (see last two threads above), but I really couldn't say.

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Old 04-10-2012, 03:00 PM   #3
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get the weber 38 for more power. don;t even think about a weber 34, they are crap. i have one in the shed for cleaning my shoes on when its muddy out.

get hte motorcraft, an old holley economiser carb, or a holley 2 or 4 barrel and be good to go. out of all the carbs i have tried, the economiser was the best. it was like it was made for the i6. you can get htem for 20 bucks on ebay or find them in old mopar vehicles in the junkyard. a very solid carb.

i just ordered a holley 450cfm four barrel to try out on my i6. i will let everyone know how it goes. i have a mc2100 1.14 two barrel on it right now and it doesn;t have any trouble, its very easy to tune and rebuild but since my jeep is a 4.5, i would like a little more oopmh, you know.
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