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Unread 10-05-2012, 06:17 AM   #1
Vaalnn
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1979 CJ7 
 
Join Date: Sep 2012
Location: Goodyear, AZ
Posts: 8
4 barrel or 2 barrel carb

Hi guys I just wanna know some of your opinions, sorry im new here so I might not know what everything means right away so ill probably ask a ton of questions. Any what do you guys think is better a 4 barrel carb or 2 barrel carb for my 1979 CJ7 with a 304, I mostly just do trail riding, and when I do trail riding I tow my jeep there. I drive it around the streets when the weather is nice so on average it sees about 50-100 miles a month. Thanks for your opinions

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Unread 10-05-2012, 07:06 AM   #2
lsukevinc
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1979 CJ5 
 
Join Date: Mar 2009
Location: Geismar, Louisiana
Posts: 323
i recently installed a Holley truck avenger 470 with an edelbrock intake on my 304. Really woke up the engine. i originally had the motorcraft 2100.
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Unread 10-05-2012, 07:41 AM   #3
Jamesurq
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1976 CJ5 
 
Join Date: Jul 2012
Location: Greensboro, NC
Posts: 118
In tagging along on this one. My 304 has the stock motorcraft 2100 and it's stumbling... Shadytree mechanic friend of mine is convinced I need to switch it out for a basic edelbrock 4 bbl and intake...
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Unread 10-05-2012, 07:52 AM   #4
GaryInOhio
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1976 CJ7 
 
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Location: Westerville, OHIO
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Go 4 bbl and Edelbrock intake like the others said.
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Unread 10-05-2012, 12:30 PM   #5
lsukevinc
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1979 CJ5 
 
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Location: Geismar, Louisiana
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there are some decent 2 bbl carbs out there. the MC2100 is a very capable carb. Holley does make a 390 and 500 CFM 2bbl if you don't want to replace your intake. I have heard lots of negative offroad stories on the 600 CFM Edelbrock.
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Unread 10-05-2012, 07:51 PM   #6
Vaalnn
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1979 CJ7 
 
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well i had the 4 barrel Edelbrock on it and it wasnt running good at all so i had it rebuild and i still didnt like the way it felt so i put the motocrat 2 barrel on it and also changed out the intake manifold and it runs better but i still dont like the way it feels when taking off some times it feels slugish, any ideas what i should do or try
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Unread 10-05-2012, 09:54 PM   #7
jumbojeepman
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1976 CJ7 
 
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Location: Greenville, NC
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My Jeep with a 304 runs great with an Edelbrock 4-bbl 600 cfm carb (also has a Crower Baja Beast cam and Edelbrock 4-bbl non-EGR intake.) I did put the off-road needles in it, it used to flood at extreme angles when it was on it's former home, a 78 F-150 with a 400.
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Unread 10-06-2012, 01:54 AM   #8
Vaalnn
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where can i look to see what model # my Edelbrock and motocraft are
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Unread 10-06-2012, 05:56 AM   #9
Matt1981CJ7
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Vaalnn

Learn to use the search function. Not only will it prevent you from asking no-brainer questions, you'll get a lot more responses, if you show that you've done a little research.

I find Google usually works better than the JeepForum search function. When I search, more often than not, Google's first link will be a JeepForum thread.

Matt
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Unread 10-06-2012, 06:01 AM   #10
1SASjeepster
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1992 YJ Wrangler 
 
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When you ran your four barrel, was it new or a used model? The reason I ask is a small Holley four barrel would be perfect for the 304 but it has to be tuned correctly. Any carburetor shop can help with that, Holley can help with that or you can find help ONLINE. What makes the four barrel great is that your 304 will mostly run on the small primaries, which are a lot smaller than the normal on a two barrel carburetor. Than when you are on the highway, the secondaries will open up. You will have good gas mileage, and power when you need it. It is a great, simple system for a V8. Have you tried going to Holley's website and going through their "Carburetor selection guide?" Answer a few questions honestly and it narrows down your selection in a reasoned manner. It should help a lot.

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Unread 10-11-2012, 05:07 AM   #11
Vaalnn
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1979 CJ7 
 
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Location: Goodyear, AZ
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the 4 barrel came on the jeep when I got it and I had it rebuilt twice by 2 different shops and I still didnt like it, the 2 barrel I have I got from the the guy I bought the jeep from and I had that rebuild then put on, maybe its just im used to driving my chevy truck around everyday and im used the to the gas pettal on that, and thats probably why I dont like the way the jeep feels when I gas it. but ill check out that holley website and see where that takes me.
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