need a breather for my mc2100 -
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post #1 of 7 Old 08-15-2009, 01:19 PM Thread Starter
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1986 CJ7 
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need a breather for my mc2100

I have a 1986 cj-7 258I6 that had the Carter BBD p.o.s. carb. I upgraded to the mc2100 and also put a wrangler power brake setup on and now I need a breather that will fit.I would like to run something like a k and n with a cold air setup, but haven't found anything that will bolt right up. Any help would be appreciated.

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post #2 of 7 Old 08-15-2009, 02:31 PM
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If I remember, my MC2100 had an intake that was the same as a 4-bbl -- that is, about 5-1/8" in diaameter. So just about any air filter that would fit a 4-bbl will work. Measure from the center mounting stud on the carb to the nearest obstruction in order to figure out the diameter needed.

BTW, I'd recommend a regular dry air filter over a K&N. I removed the K&N from my 360 some time ago because it let in too much crap.

1977 CJ7, AMC360 V8 w/ headers, DUI HEI, Edelbrock intake, Holley 4150 carb, , TF999, D300, D30 front and AMC20 rear with 4.56 gears and lockers both ends, 4" susp lift, 2.5" body lift, 35" BFGs, ARG steering, 8000-lb winch, etc.
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post #3 of 7 Old 08-15-2009, 04:10 PM
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If you are going to wheel this I whould suggest a stock type breather hole facing backwards. Your fan will sling water and mud into your breather. Not enough to screw up the engine but you will clog the air filter up quickly.

Anything is possible if you don't know what you are talking about.
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post #4 of 7 Old 08-15-2009, 06:55 PM
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post #5 of 7 Old 08-15-2009, 08:38 PM
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Keep in mind a carburetor is a wet manifold system. Unlike fuel injection, fuel and air is mixed by venturi at the carb/throttle body. If you want a cold air system (or snorkel) you're going to need a plenum like this.

Vibration? Bump steer? Wandering? Read the article (sticky) on Steering, suspension, and driveline.
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post #6 of 7 Old 08-15-2009, 09:43 PM Thread Starter
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Thanks for the help,guys. I figured I might have to fab something up.Just not sure if the kn plenum would fit and don't wanna drop alot of coin especially if I'm not sure about fitment issues...
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post #7 of 7 Old 08-16-2009, 08:07 AM
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I got one off the shelf at Advance Auto. I got a little adaptor/riser kit for a few bucks more since mine wouldn't sit flush because of the fuel bowl.

It's little, maybe 6 or 7 inches across and chrome, but it works. I don't do mud much, so I don't worry about it.

79' CJ7 - 4" lift, 33's
81' CJ8 bone stock
80' Chief "S" 6" lift, 33's
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