Step-Up Piston & Rod Assembly

Be sure step-up rods move freely on each side of vertical position. Carefully guide step-up rods into main metering jets.

1975 CARBURETOR ADJUSTMENT SPECIFICATION TABLE

Carter Carb. No.

Idle Speed (Engine RPM)

Fast Idle Cam Position

Float Level Setting ⁽¹⁾

Acc.⁽²⁾ Pump Travel

Unloader Setting

Vacuum Break Setting

Hot

Fast

BBD-8000S

750

1500

.070"

1/4"

1/2"

.280"

.130"

BBD-8064S

750

1500

.070"

1/4"

1/2"

.310"

.070"

BBD-8001S

900

1500

.070"

1/4"

1/2"

.310"

.110"

BBD-8003S

750

1500

.070"

1/4"

1/2"

.310"

.110"

⁽¹⁾	At center of floats.

⁽²⁾	Throttle closed tightly.

1976 CARBURETOR ADJUSTMENT SPECIFICATION TABLE

Carter Carb. No.

Idle Speed (Engine RPM)

Fast Idle Cam Position

Float Level Setting ⁽¹⁾

Acc.⁽²⁾ Pump Travel

Unloader Setting

Vacuum Break Setting

Hot

Fast

AMC

8073

850

1700

.095"

.250"

.500"

.250"

.128"

8067

700⁽³⁾

1700

.095"

.250"

.500"

.250"

.128"

Chry. Corp.

8069S

750

1200

.070"

.250"

.500"

.310"

.070"

8070S

750

1500

.070"

.250"

.500"

.310"

.110"

8071S

750

1500

.070"

.250"

.500"

.280"

.130"

8077S

900

1250

.070"

.250"

.500"

.280"

.110"

⁽¹⁾	At center of floats.

⁽²⁾	Throttle closed tightly.

⁽³⁾	600 RPM - Calif.

1977 CARBURETOR ADJUSTMENT SPECIFICATION TABLE

Carter Carb. No.

Idle Speed (Engine RPM)

Fast Idle Cam Position

Float Level Setting ⁽¹⁾

Acc.⁽²⁾ Pump Travel

Unloader Setting

Choke Valve Clearance

Hot

Fast

AMC

8103

600

1600

.120"

.250"

.496"

.280"

.150"

8104

600

1500

.095"

.250"

.520"

.280"

.128"

8117

700

1600

.112"

.250"

.480"

.280"

.152"

Chrys. Corp.

8087S

750

1600

.070"

.250"

.469"

.280"

.100"

8089S

800

1600

.070"

.250"

.469"

.280"

.130"

8090S

850

1700

.070"

.250"

.469"

.280"

.130"

8093S

700

1400

.070"

.250"

.469"

.310"

.130"

8094S

700

1400

.070"

.250"

.469"

.310"

.070"

8096S

850

1500

.070"

.250"

.469"

.310"

.110"

8126S

850

1500

.070"

.250"

.469"

.310"

.110"

8127S

750

1500

.070"

.250"

.469"

.280"

.110"

8170S

700

1300⁽³⁾

.070"

.250"

.500"

.310"

.110"

8172S

750

1500⁽³⁾

.070"

.250"

.500"

.310"

.110"

⁽¹⁾	At center of floats.

⁽²⁾	Throttle closed tightly.

⁽³⁾	RPM after 500 miles.

1978 CARBURETOR ADJUSTMENT SPECIFICATION TABLE

Carter Carb. No.

Idle Speed (Engine RPM)

Fast Idle Cam

Float Level Setting

Acc. Pump Travel

Choke Unloader Setting

Vacuum Kick Setting

Step-Up Piston Gap

Choke Valve Clearance

Auto. Choke Setting

Hot

Fast

American Motors

258" 6 Cyl.

BBD-8128

⁽¹⁾

1600⁽²⁾

.110"

.25"⁽³⁾

.496"

.280"

.....

.040"

.150"

INDEX

BBD-8129

⁽¹⁾

1500⁽²⁾

.095"

.25"⁽³⁾

.520"

.280"

.....

.040"

.128"

1 NR

Chrysler Corp.

225" 6 Cyl.

BBD-8136S

⁽¹⁾

1500

.070"

.25"⁽³⁾

.500"

.280"

.110"

.035"

.....

BBD-8137S

⁽¹⁾

1600

.070"

.25"⁽³⁾

.500"

.280"

.100"

.035"

.....

BBD-8177S

⁽¹⁾

1600

.070"

.25"⁽³⁾

.500"

.280"

.100"

.035"

.....

318" V8

BBD-8143S

⁽¹⁾

1500

.070"

.25"⁽³⁾

.500"

.280"

.150"

.035"

.....

BBD-8175S

⁽¹⁾

1400

.070"

.25"⁽³⁾

.500"

.280"

.160"

.035"

.....

⁽¹⁾	See Emission Control/Tune-Up Decal.

⁽²⁾	± 100 RPM. Hot with TCS solenoid & EGR disconnected.

⁽³⁾	± 1/32" (.031").

1979 CARBURETOR ADJUSTMENT SPECIFICATION TABLE

Application	Float Level Setting	Vacuum Piston Gap Setting	Accel. Pump Stroke Setting	Fast Idle Cam Setting	Choke Vacuum Kick Setting	Choke Unloader Setting	Auto. Choke Setting
American Motors
8185	1/4"	.035"	.470"	.110"	.140"	.280"	1 Rich
8186	1/4"	.035"	.520"	.110"	.150"	.280"	1 Rich
8187	1/4"	.035"	.470"	.110"	.140"	.280"	1 Rich
8188	1/4"	.035"	.520"	.110"	.150"	.280"	1 Rich
8221	1/4"	.035"	.530"	.110"	.150"	.280"	1 Rich
Chrysler Corp.
BBD-8198S	1/4"	.035"	.500"	.070"	.100"	.280"	.....
BBD-8199S	1/4"	.035"	.500"	.070"	.100"	.280"	.....
BBD-8230S	1/4"	.035"	.500"	.070"	.110"	.280"	.....
BBD-8245S	1/4"	.035"	.500"	.070"	.100"	.280"	.....