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Registered
Join Date: Dec 2005
Location: Hamilton, IL
Posts: 553
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basic zenith carb adjustment.
I can visibly see fuel shooting out of three cylinders when i rev my engine. and the engine is resistant to rev past about 2200 rpm. I'm sure its rich on three cylinders, but i don't know what screw does what on the carbs, and i cant find a diagram explaining it. I'm new to carbs completely. i plan to have the carb adjusted professionally. but i need to get it running well enough to get it there first. can some tell me what screw will lean out the carb?
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71' 911T Targa, current toy. 86.5 928s traded for new 911 71 911 Targa w/ gas burners, PMO's, *sold* Lamborghini diablo replica w/ 350 V8 85.5' 944 n/a euro ( gave to dad ) 87 fiero cp. candy blue, chrome 16's 90' DSM 24psi. 18G fmic, 82' benz 300sd turbo, intercooled. 73' Karmann Ghia cab. sold 04' Standard 250s ox, euro bb 28/10 gearing, odyssey, profile, 29lbs, check out www.vintagevwcars.com wanted: 914, 944, 928 project Last edited by fierochris; 01-08-2007 at 06:28 AM.. |
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01-08-2007, 06:15 AM
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I have had problems getting mine tuned as well. Have to tow the car two hours away to get it done. Nobody does carbs here anymore. There should be someone that we could ship them to to have them tuned.
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1974 911s "It smelled like German heaven" http://www.youtube.com/watch?v=6ySt9SeZl9s |
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01-08-2007, 07:34 AM
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Join Date: Apr 2002
Location: Santa Barbara, CA
Posts: 2,062
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I have the info for Zenith adjusting on my home computer and can post it when I get home tonight. Also do a search here using Zenith adjustment or carb adjustment and that should bring up several good threads on the subject.
Here is a diagram that might help also  This link may prove helpfull also, Zenith adjusment
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Dan Byers |
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01-08-2007, 07:53 AM
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Great Link Dan, Thanks.
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1974 911s "It smelled like German heaven" http://www.youtube.com/watch?v=6ySt9SeZl9s |
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01-08-2007, 08:21 AM
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Home of the Whopper
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The Haynes manual covers it pretty well. At least I was able to tune mine using it.
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1968 912 coupe 1971 911E Targa rustbucket 1972 914 1.7 1987 924S |
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01-08-2007, 08:36 AM
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Join Date: Dec 2005
Location: Hamilton, IL
Posts: 553
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i dont see 79 on mine. upgraded, or removed for some reason?
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71' 911T Targa, current toy. 86.5 928s traded for new 911 71 911 Targa w/ gas burners, PMO's, *sold* Lamborghini diablo replica w/ 350 V8 85.5' 944 n/a euro ( gave to dad ) 87 fiero cp. candy blue, chrome 16's 90' DSM 24psi. 18G fmic, 82' benz 300sd turbo, intercooled. 73' Karmann Ghia cab. sold 04' Standard 250s ox, euro bb 28/10 gearing, odyssey, profile, 29lbs, check out www.vintagevwcars.com wanted: 914, 944, 928 project |
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01-08-2007, 08:36 AM
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Join Date: Oct 2006
Location: Chicago
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#79 is the auxilary enrichment circuit....I've seen cars with them removed and in some cases the holes JB welded up. I believe it's for emmision control, but mine never did pass emmisions and I still have it. Too scared to take it off for fear of messing up something. If it ain't broke.....
Brian |
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01-08-2007, 03:18 PM
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OOoops I replied using my sons account.
sorry Brian
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PCA-Chgo 1970 911t |
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01-08-2007, 03:21 PM
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Join Date: Oct 2006
Location: Mt Pleasant, SC
Posts: 1,166
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These are great carbs once they are set up. Great throttle response. Check the injection nozzles (sp???) they will leak/drip fuel.
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Tim 1986 930 Gone:71,2,4 914's, 70T, 71T(RS),77S |
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01-08-2007, 04:02 PM
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1974 Porsche 911s
Olive
The Turtle
Ruby
Brownie
babysh*t
