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post #1 of (permalink) Old 03-14-2001, 02:44 PM
ramekr
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Which Weber Carb?

I hear a lot about how a new Weber carb will improve the drivability of my 1990 jeep. Which model carb is everybody raving ab out? Is it the one listed in 4 wheel drive hardware parts catalog( 300 cfm 2bbl for 6cyl 258?) or is it a 4bbl? Will the stock air cleaner work with this new carb and if not what becomes of the pulse air tubes and all the emissions junk hanging from the air cleaner? Any help on this would be welcome. Thanks

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post #2 of (permalink) Old 03-14-2001, 03:32 PM
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Re: Which Weber Carb?

http://www.weber-carburetors.com/index.htm This link has the info you seek. Somewhere con it is a adapter for a Weber and your breather, I think. You will also have to get your computer out of the carb loop with the "Nutter bypass".


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post #3 of (permalink) Old 03-14-2001, 03:45 PM
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Re: Which Weber Carb?

The Nutter bypass has nothing to do with hooking up another carb like the Weber. You simply don't use that plug anymore, the carb doesn't need the computer to run properly. There are 2 Webers for your application, the Progressive 32/36 and the 38. The 32/36 is for a stock motor, you will notice slight performance gains with it. The 38 is a little too much carb for a stock motor, virtually everyone I have heard complain about the performance of their Weber had a 38 on a stock motor, and they experienced bogging.

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post #4 of (permalink) Old 03-14-2001, 05:06 PM
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Re: Which Weber Carb?

do you think this is an emission friendly conversion? Being from Connecticut we have strict emission regulations. The jeep didn't pass with the stock carb so I had to get waivers a real pain in the butt. They would brobably hang me if the discovered an "evil after market" piece of equipment

post #5 of (permalink) Old 03-14-2001, 05:24 PM
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Re: Which Weber Carb?

YOu most likely will NOT pass a visual inspection, but it should pass a sniffer with flying colors.

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post #6 of (permalink) Old 03-14-2001, 05:53 PM
 
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Re: Which Weber Carb?

My $.02 is if you are even thinking about doing any engine mods in the future, get the 38. If you plan on leaving your 258 completely stock, get the 32/36.
I have had my Weber 38 on my mostly stock motor for over 10 years now and it has always been a dependable, powerful unit. I recently swapped to a HEI distributer, and with those 2 changes the 258 really comes alive.
I was origanly going to get a different cam soon after buying my carb, and that's the main reason I went with the 38, but to be honest, I have no complaints with my current setup. The only "problem" I had to cure was it's tendancy to go rich in *very* extreme angles, but lowering the float level 1/4" or so seems to have cured it. Others have reported success with using a fuel pressure regulator set to 3-5 psi.
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post #7 of (permalink) Old 03-15-2001, 01:33 AM
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Re: Which Weber Carb?

I just switched to the 32/36 after hearing why I shouldn't go with the 38. I feel like I'm driving a new vehicle. The stock air cleaner and many of the hoses you will be able to throw away. The new weber comes with the air filter and housing. The one thing I did need in addition to my new carb (it's pretty much ready to go out of the box) was a manual fuel pressure regulator. The 32/36 wants about 3psi and I know my YJ was pushing more than that stock. I think the regulator was an additional $25 from a local performance place. Napa, Advanced, etc don't stock them. Good luck.

CJ

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post #8 of (permalink) Old 03-15-2001, 05:03 PM
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Re: Which Weber Carb?

Beg to differ with you Rusty87YJ, I got my fpr at NAPA.

The NAPA part # is #730-2367 . It was the one for the 5/16" fuel line. Not sure if you want that or the 3/8" one, but mine works fine. I just bought it off the rack at NAPA for something like $23. It was made by Balkamp, is chrome plated, and has a range something like 1 to 6 psi in 1/2 psi increments.

DesertRat


90 YJ, 258 I6. Weber 32/36, the rest is stock Sahara.
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post #9 of (permalink) Old 03-15-2001, 05:34 PM
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Re: Which Weber Carb?

Same fpr I got. Good, heavy duty unit.

Brad
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post #10 of (permalink) Old 03-17-2001, 11:30 PM
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Re: Which Weber Carb?

Damn... Thanks for the info, I tried Twin-B first just because it's with in walking distance, and they called around for me. They couldn't find one, and recommended I try specialty stores... Maybe just the Napa down the street was out or doesn't carry anymore. Who knows, but thanks...


CJ

Rusty beat-up old junker with many problems.
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