AFB question ???

[2R5]

Just acquired a 4 bbl manifold , carb and air cleaner off a ' 64 Lark, today. When I got it home I checked all the numbers out and the carb # isn't in the parts book but I find it on a Studebaker carb listing I have and it shows that # in this listing. The # is 3506S with A3 under it . Now I have another ' 64 set up and the carb # is 3726S and that one is in the book . Can anyone tell me what the difference is between these two carbs ....if any ? There doesn't appear to be any difference looking at them.

[JDP]

It's a R1 carb, wanna trade for the stock one. <g>

Studebaker On The Net http://stude.com
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64 Daytona HT
64 Daytona Convert.
64 R2 4 speed Challenger
63 R2 4 speed GT Hawk
63 R1 GT Hawk
63 Avanti R1/AC
63 Avanti R2/4 speed
62 Daytona HT
62 Lark 2 door
60 Hawk

[2R5]

So whats the diffence....bigger jets?

[JDP]

It's jetted richer and I think may flow a bit more. ( not sure)

Studebaker On The Net http://stude.com
Studebaker News Group

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64 Daytona HT
64 Daytona Convert.
64 R2 4 speed Challenger
63 R2 4 speed GT Hawk
63 R1 GT Hawk
63 Avanti R1/AC
63 Avanti R2/4 speed
62 Daytona HT
62 Lark 2 door
60 Hawk

[Laemmle]

For carb questions...Jon Myer is the go to person.

[2R5]

JP....I looked in the back section under jet thrust part numbers and the 3506S carb # isn't mentioned there either. You sure its a R1 carb ?

[Laemmle]

That and 3726S were on standard 289s.

[JDP]

Found by Googleing 3506S

Carter Carbs Specs for R - Engines
R1 - Carter AFB 1 7/16" primaries, 1-1 1/16" secondries
model 3506s
flow 625 CFM (+-10)
Replacement = Carter CRT-9635 or Edelbrock 1406
Jets: .089" (120-159) primaries;
.058" & .069 (16-99) metering rods.
Secondary jets were .077" (120-177)


R2 - Carter AFB 1-7/16" primaries, 1-11/16" secondries
Calibrated and sealed Stude# 1561641
model AFB-3606
flow 625 CFM (+-10)
Replacement Carter CRT-9635 or Edelbrock 1406
( Use Procharger bonnet to adapt supercharger hose)

R3 - Carter AFB 1-7/16" primaries, 1-11/16" secondries
Competition model Stude# 1558637
Standard model 1563050
model AFB-3808S
flow 625 CFM (+-10)
Primary jet # 120-159 Size (.089)
Secondary Jet # 120-166 size (.0935)
Primary metering rod # 16-103 size (.068 X .060)
float setting 13/32"

R4 - Carter AFB 1-9/16" primaries, 1-11/16" secondries
Front Carb
Standard model Stude# 1563051
AFB-3810S
flow 675 CFM (+-10)
Primary jet # 120-162 Size (0-1015)
Secondary Jet # 120-176 size (.0635)
Primary metering rod # 16-124 size (.069 X .0635)
float setting 5/16"

Rear Carb
Standard model Stude# 1563051
AFB-3811S
flow 675 CFM (+-10)
Primary jet # 120-162 Size (0-1015)
Secondary Jet # 120-122 size (.070)
Primary metering rod # 16-204 size (.073 X .063)
float setting 5/16"

Studebaker On The Net http://stude.com
Studebaker News Group

http://groups.google.com/group/alt.autos.studebaker

64 Daytona HT
64 Daytona Convert.
64 R2 4 speed Challenger
63 R2 4 speed GT Hawk
63 R1 GT Hawk
63 Avanti R1/AC
63 Avanti R2/4 speed
62 Daytona HT
62 Lark 2 door
60 Hawk

[2R5]

Thanks JP...thats good info to have