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Author
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Topic: Air/Fuel Mixture Settings
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MustangRdr68
Gearhead Posts: 385
From: Bensalem, PA
Registered: Jul 2001
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posted 02-13-2002 07:29 PM
   
could anyone tell me how to set the screws for the air/fuel mixture on the carb. i need to know the # of turns. i have a 2 barrel holley on a 289.Thx
Mike ------------------
1968 Mustang Coupe 289
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V8 Thumper
Gearhead Posts: 3529
From: Orange, Ca. United States of America
Registered: Dec 2001
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posted 02-13-2002 07:39 PM
Adjust mixtures for maximum manifold vaccum at idle
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MustangRdr68
Gearhead Posts: 385
From: Bensalem, PA
Registered: Jul 2001
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posted 02-13-2002 09:57 PM
Sorry V8, dont understand.... to technical for me  . i just need to no what the screws were set at stock or what is a good setting for them.Thx Mike ------------------
1968 Mustang Coupe 289
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Stang28965
Gearhead Posts: 411
From: Webster New York USA
Registered: Mar 2001
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posted 02-14-2002 06:23 AM
You need a vacuum gauge. It will hook up to one of your ports on your carb, After you have that done have the car warmed up and let it idle, You will want to adjust the settings untill you see max vacuum on the gauge. Its hard to say a stock setting. This is the only real way to do it. Or try trial and error set it for an idle then keep adjusting the mixture untill it sounds good and will idle smooth, but id go the vacuum gauge route------------------
-Jeff
1965 Mustang with a 289 bored .030" over. The 289 has a Holley 600cfm 4bbl, 302 heads, tri-y headers, Elgin cam .448int. 204deg, .472 exh 214deg. Eagle connecting rods, As for the drivetrain, I have a 4speed with 3.55 gears in the back.
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