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  '64 1/2 to '73 -- The Classic Mustang
  Air/Fuel Mixture Settings

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Author Topic:   Air/Fuel Mixture Settings
MustangRdr68
Gearhead

Posts: 385
From: Bensalem, PA
Registered: Jul 2001

posted 02-13-2002 07:29 PM     Click Here to See the Profile for MustangRdr68   Click Here to Email MustangRdr68     Edit/Delete Message   Reply w/Quote
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

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1968 Mustang Coupe 289

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V8 Thumper
Gearhead

Posts: 3529
From: Orange, Ca. United States of America
Registered: Dec 2001

posted 02-13-2002 07:39 PM     Click Here to See the Profile for V8 Thumper   Click Here to Email V8 Thumper     Edit/Delete Message   Reply w/Quote
Adjust mixtures for maximum manifold vaccum at idle

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MustangRdr68
Gearhead

Posts: 385
From: Bensalem, PA
Registered: Jul 2001

posted 02-13-2002 09:57 PM     Click Here to See the Profile for MustangRdr68   Click Here to Email MustangRdr68     Edit/Delete Message   Reply w/Quote
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

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1968 Mustang Coupe 289

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Stang28965
Gearhead

Posts: 411
From: Webster New York USA
Registered: Mar 2001

posted 02-14-2002 06:23 AM     Click Here to See the Profile for Stang28965   Click Here to Email Stang28965     Edit/Delete Message   Reply w/Quote
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

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-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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