carb size
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Posting Guru
Joined: Apr 2006
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From: NAMPA, ID.
carb size
Does anyone KNOW if the carbs are different based on engine size such as 390 versus 360? Are jet sizes different? My 390 has a little lean surge and carb was originally for a 360.
Post Fiend
Joined: Apr 2002
Posts: 19,311
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From: Waterloo, Iowa
The Ford Shop manual will have the specific carburetor venturi size, booster, jets and power valve size for your engine as from the factory. After all this time there's no telling what's on there or what has been done to it so you'll have to check. What jets are in there now, it would take some work to get a lean surge at Idaho elevations I'd think.
Lead Driver
Joined: Aug 2003
Posts: 7,592
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From: **** hole San Jose ca.
Through the yrs, I've found jetting on the same carb was done by model of the trucks.
A f100 autolite say had #52 for a 360, where as say model Custom f250 360 was jetted with #54. Then a f250 C/S was jetted with #57 with having a 360/390. Then possible change Carb size whit jetting
Orich
A f100 autolite say had #52 for a 360, where as say model Custom f250 360 was jetted with #54. Then a f250 C/S was jetted with #57 with having a 360/390. Then possible change Carb size whit jetting
Orich
Ford Parts Specialist
Joined: Nov 2006
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From: Simi Valley, CA
Your Gallery pic shows a 1967 F100 Camper Special that would have come with the 352 2V
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From: NAMPA, ID.
Where exactly is this stamping? I don't see any.
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Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
Tag code C8TF-Z =
2) C3UZ-9533-B .. #55F Jet - 0-5,000 ft. (Motorcraft CJ-140) / Obsolete
2) C3DZ-9533-A .. #53F Jet - 5,000-10,000 ft. (Motorcraft CJ-128) / Obsolete
---------------------------------------------------------------------------------------
Tag codes C8TF-AY & AZ =
2) C3GY-9533-C .. #54F Jet - 0-5,000 ft. (Motorcraft CJ-146) / Obsolete
2) C3UZ-9533-A .. #52F Jet - 5,000-10,000 ft. (Motorcraft CJ-133) / Obsolete
All of these jets are available NOS
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Posting Guru
Joined: Apr 2006
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From: NAMPA, ID.
It looks like 1.23 to me.
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Posting Guru
Joined: Apr 2006
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From: NAMPA, ID.
1968/69 F100/350 390/C6:
Tag code C8TF-Z =
2) C3UZ-9533-B .. #55F Jet - 0-5,000 ft. (Motorcraft CJ-140) / Obsolete
2) C3DZ-9533-A .. #53F Jet - 5,000-10,000 ft. (Motorcraft CJ-128) / Obsolete
---------------------------------------------------------------------------------------
Tag codes C8TF-AY & AZ =
2) C3GY-9533-C .. #54F Jet - 0-5,000 ft. (Motorcraft CJ-146) / Obsolete
2) C3UZ-9533-A .. #52F Jet - 5,000-10,000 ft. (Motorcraft CJ-133) / Obsolete
All of these jets are available NOS
Tag code C8TF-Z =
2) C3UZ-9533-B .. #55F Jet - 0-5,000 ft. (Motorcraft CJ-140) / Obsolete
2) C3DZ-9533-A .. #53F Jet - 5,000-10,000 ft. (Motorcraft CJ-128) / Obsolete
---------------------------------------------------------------------------------------
Tag codes C8TF-AY & AZ =
2) C3GY-9533-C .. #54F Jet - 0-5,000 ft. (Motorcraft CJ-146) / Obsolete
2) C3UZ-9533-A .. #52F Jet - 5,000-10,000 ft. (Motorcraft CJ-133) / Obsolete
All of these jets are available NOS
