mc 2100/2150 vs. Weber 38 DGES - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep CJ Forum > mc 2100/2150 vs. Weber 38 DGES

TeraFlex Now at Rockridge 4WD! BEST DEALS around!Alloy usa heavy duty ball joint kitsENGO QUADLUX 6" to 54" LED AMBER AND WHITE MULTI

Reply
Unread 08-21-2013, 12:11 PM   #1
shadoow
Member
1985 CJ7 
 
Join Date: Nov 2006
Location: Granbury, Texas
Posts: 471
mc 2100/2150 vs. Weber 38 DGES

i've read a lot of posts on these carbs and either seems to be good. I'm looking for someone that is familiar with both as i'm wondering which would be easiest to change between low and high elevations. I live at low elevation, but we go to higher elevation (8000-12000 ft.) in the summer. I would like to use my jeep in both situations. Jeep has a 258.

shadoow is offline   Reply With Quote Quick reply to this message
Unread 08-22-2013, 07:31 AM   #2
shadoow
Member
1985 CJ7 
 
Join Date: Nov 2006
Location: Granbury, Texas
Posts: 471
anyone ??? maybe someone that's familiar with retuning either of these carbs for elevation change??
shadoow is offline   Reply With Quote Quick reply to this message
Unread 08-22-2013, 07:50 AM   #3
swatson454
Mall-crawlin' Hot Rodder
 
swatson454's Avatar
1983 CJ7 
 
Join Date: May 2009
Location: Dripping Springs, TX (soon)
Posts: 4,913
I've been watching this one for someone who has done both carbs. I know a Weber 38 would go from a 145 main jet down to a 135 or maybe even a 130 and the jets are pretty easy to change. You'd need to take the idle jets down to 45s as well. Those are super easy to swap out.

I have no idea what's needed on an MC but Webers have quite a bit of tuning available with separate idle jets.


Shawn
__________________
Live in a way that those who know you but don't know God will come to know God because they know you.
swatson454 is offline   Reply With Quote Quick reply to this message
Unread 08-22-2013, 09:14 AM   #4
shadoow
Member
1985 CJ7 
 
Join Date: Nov 2006
Location: Granbury, Texas
Posts: 471
thanx for the info swatson. To change the weber jets as you described does the carb have to be removed from the intake manifold??

On the MC carb my understanding is the jets and likely the power valve has to be changed and changing the power valve requires removal of the carb as it's on the bottom. Can someone verify??
shadoow is offline   Reply With Quote Quick reply to this message
Unread 08-22-2013, 09:30 AM   #5
swatson454
Mall-crawlin' Hot Rodder
 
swatson454's Avatar
1983 CJ7 
 
Join Date: May 2009
Location: Dripping Springs, TX (soon)
Posts: 4,913
Quote:
Originally Posted by shadoow View Post
thanx for the info swatson. To change the weber jets as you described does the carb have to be removed from the intake manifold??
No but the top of the carb has to come off. It's quick and easy with the exception of that tiny c-clip on the choke plate. It comes off really easy but likes to play hide-and-seek.

The idle jets are located on the side of the carb and can be swapped out in no time with just a screw driver.

I can't imagine an MC needing a power valve swap


Shawn
__________________
Live in a way that those who know you but don't know God will come to know God because they know you.
swatson454 is offline   Reply With Quote Quick reply to this message
Unread 08-22-2013, 10:22 AM   #6
jeepwhore
Hair puller xtraordinaire
 
jeepwhore's Avatar
1984 CJ7 
 
Join Date: Jun 2006
Location: Kamloops, BC
Posts: 3,127
Quote:
Originally Posted by swatson454 View Post
......

I can't imagine an MC needing a power valve swap


Shawn
Me either. Changing the PV will change the point in acceleration at which the extra fuel is let into the system but unless the OP putts around at 1/4 throttle all day it will still do it's job.
__________________
'84 CJ-7: Yota axles (spartan locked front, e-locked rear) 4" BDS, 1" Daystar & 3/8" shackle lifts, 35" X-Terrains on steelies, YJ Tub & family roll bar, heater blower upgrade, 4.2L w/MC2100 & Team Rush, Warn 8274. Rebuilt 4.2/4.0 hybrid, AX15 and twin sticks/clocking ring waiting to go in.

The advertised position for a topless, dirty jeep girl has been filled......by my wife. Thanks to all that applied.
<------------and yes, that is her.
:-D
jeepwhore is offline   Reply With Quote Quick reply to this message
Unread 08-22-2013, 01:57 PM   #7
shadoow
Member
1985 CJ7 
 
Join Date: Nov 2006
Location: Granbury, Texas
Posts: 471
OK, sounds like i'm wrong on the MC power valve so that's good to know, appreciate it.
Can the jets on the MC be changed similarly to the Weber??
shadoow is offline   Reply With Quote Quick reply to this message
Unread 08-23-2013, 03:21 AM   #8
razor2264
Registered User
1979 CJ5 
 
Join Date: Sep 2008
Location: Iwakuni, Japan
Posts: 139
Quote:
Originally Posted by shadoow
OK, sounds like i'm wrong on the MC power valve so that's good to know, appreciate it.
Can the jets on the MC be changed similarly to the Weber??
I ran a mc 2100 for a couple years. I put #47 jets in and it ran well. To change the jets, take off the top and they are in the bottom of the bowl.
razor2264 is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Thread Tools






Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.