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Unread 05-22-2010, 07:41 AM   #1
frank c
Registered User
1981 CJ5 
 
Join Date: Sep 2007
Location: northwest arizona
Posts: 403
M/C 2100-2150 JET Suggestions

I have my 81CJ5 258, I'm going to pick up the block at the machine shop today and I have a 2100 and a 2150 M/C carb to restore for it I am at 3200 ft elevation and will be using the jeep at 2500- 4500 ft elevations aproximately.
I'm going to do the distributor upgrade with the adapter , larger cap e-coil and probably summit cdi box Engine rebuild is stock specks except for .060 overbore.
The 2150 carb has # 50 jets in it I got it off a small v-8 ford p/up I don't know what size is in the 2100 havent taken apart yet.
Their both 1.08 Venturis
WHAT SIZE WOULD YOU GUYS RECOMMEND I HAVE IN THE carbs when I decide to install either one on the new rebuilt engine ?????????
From searching posts I've seen everything from 45's on up jet size ???


Last edited by frank c; 05-22-2010 at 09:14 AM..
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Unread 05-22-2010, 06:02 PM   #2
RR4W
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1986 CJ7 
 
Join Date: Jan 2009
Location: Washington
Posts: 21
I use 46's at sea level. Reading other posts have suggested 47's at higher elevations.
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Unread 05-22-2010, 07:02 PM   #3
frank c
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1981 CJ5 
 
Join Date: Sep 2007
Location: northwest arizona
Posts: 403
Thats making me wonder if I can get away with using the 50's that are in it at my el. I'll even be at 5000 + ft at times.
What I;'m worried about is initial start up of rebuilt engine with the carb cause I dont want to put the original carter back on it.
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