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  '64 1/2 to '73 -- The Classic Mustang
  Carter carb help

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Author Topic:   Carter carb help
70SportsRoof
Gearhead

Posts: 777
From: Phoenix, AZ
Registered: Dec 2001

posted 11-21-2002 12:24 PM     Click Here to See the Profile for 70SportsRoof   Click Here to Email 70SportsRoof     Edit/Delete Message   Reply w/Quote
I've been tuning up my '70 and have a question. My car has a 625 Carter, which as we all know is similar to the Edelbrock carbs. According to Edelbrock, on their carbs turning the Idle Mixture Screws clockwise leans the A/F mixture, and counter richens the A/F. Does this also apply to the Carters? Stupid qiestion, but I need to know. Thanks.

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Gary M.-
1970 Mustang Deluxe SportsRoof (daily driver), 1946 Ford pickup, 1947 Ford pickup, 1957 Ford Fairlane 500 Town Vic

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Moneymaker
Administrator

Posts: 19751
From: Lyons, IL, USA
Registered: May 99

posted 11-21-2002 12:29 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Counter clockwise for lean and clockwise for rich.

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Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
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Quote #1: "I never met a magazine mechanic I liked."
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70SportsRoof
Gearhead

Posts: 777
From: Phoenix, AZ
Registered: Dec 2001

posted 11-21-2002 12:44 PM     Click Here to See the Profile for 70SportsRoof   Click Here to Email 70SportsRoof     Edit/Delete Message   Reply w/Quote
So the Edelbrock is bass-ackwards from the Carter's...damn those engineers, making things difficult!

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Gary M.-
1970 Mustang Deluxe SportsRoof (daily driver), 1946 Ford pickup, 1947 Ford pickup, 1957 Ford Fairlane 500 Town Vic

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Moneymaker
Administrator

Posts: 19751
From: Lyons, IL, USA
Registered: May 99

posted 11-21-2002 12:49 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
I don't know about a$$backwards, but I do know that the needles at the end of the idle mixture adjusting screws come to a point. That point seats into a passage that introduces or blocks off air, not fuel. At least it did on the last AFB I looked at.

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Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"

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Jeff
Gearhead

Posts: 280
From: Moore, OK USA
Registered: Mar 2001

posted 11-21-2002 03:33 PM     Click Here to See the Profile for Jeff   Click Here to Email Jeff     Edit/Delete Message   Reply w/Quote
My Carter experience isn't recent but I recollect threads were right hand, meaning lean is CW. You can tell for sure by inspection. Whichever way tightens the mixture screw springs is lean.

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indyphil
Gearhead

Posts: 877
From: Lafayette, IN, USA
Registered: Jul 2002

posted 11-21-2002 04:13 PM     Click Here to See the Profile for indyphil   Click Here to Email indyphil     Edit/Delete Message   Reply w/Quote
Easy way to know for sure,
turn them one way till the motor slows down now look at the exhaust, if its rich it will be making smoke (black smoke) if its lean it will be misfiring periodically.

My guess is that they are like my edelbrock with right handed threads, CW will screw the adjusters in and make it leaner.

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70SportsRoof
Gearhead

Posts: 777
From: Phoenix, AZ
Registered: Dec 2001

posted 11-22-2002 05:04 PM     Click Here to See the Profile for 70SportsRoof   Click Here to Email 70SportsRoof     Edit/Delete Message   Reply w/Quote
Thanks guys, I knew I'd find my answers here.

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Gary M.-
1970 Mustang Deluxe SportsRoof (daily driver), 1946 Ford pickup, 1947 Ford pickup, 1957 Ford Fairlane 500 Town Vic

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soaring
Gearhead

Posts: 116
From: New Mexico
Registered: Nov 2002

posted 11-22-2002 06:29 PM     Click Here to See the Profile for soaring   Click Here to Email soaring     Edit/Delete Message   Reply w/Quote
Moneymaker is right. If you turn it clockwise, you are restricting the air, and if you turn it counter-clockwise you are adding more air.

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