Chevrolet 10 Series 1970 Service Manual page 652

Carburetor M
250
Engine Displacem ent 292 250
(H orsepow er) (155) (170) (155)
Transm ission A ll A ll A ll
40
Truck Series 40 10
50
P a rt Number
(except R PO NA9
RPO NA9
- -
P a rt Number
F loat L e v e l 1/4 1/4 1/4
Float Drop
A c c e le ra to r Pump
Idle Vent
Mechanical .100 .100 .100
Fast Idle
Running
2400 rpm
C arbu retor Choke Rod .150 .150 .190
Choke Vacuum Break
.230
Choke Unloader .350
Therm ostat Choke Rod
A ir Valve Spring
Main M e te r­
P rim a ry .106 .128 .104
ing Jet
P rim a ry 1 11/16"
Throttle
B ore
Secondary
A ir V alve Dashpot
M etering Rod .070 .070 .070
(T)
Bottom of rod should be even with top o f hole.
( 2 ) Top of rod should be even with bottom of hole.
R OCHESTER
M V 2GV (1 1/4)
250 292 292 307 307 307
(155) (170) (170) (200)
(200) (200)
A ll A ll A ll Auto Man A ll
20 40 20
10 10 10
30 50 30
- -
1/4 1/4
1/4 23/32 23/32 27/32
1 3/4 1 3/4 1 3/4
1 3/8 1 3/8 1 3/8
.027 .027 .027
.100 .100 One Turn
.100
2200-2400 rpm
.180 .275 .275 .060 .060
.060
.260 .350 .350 .140 .140 .130
.350 .350 .350 .215
.215 .215
® ® ®
® ® ®
.106 .128 .128 .049 .051 .052
1 7/16"
.070 .070 .070
2G (1 1/2)
4MV
350 350 350 350 350
396 396
(215) (215) (255) (255) (255) (310) (310)
A ll A ll Auto Man A ll
Auto Man
20
40 50 10 10
10 10
30
- -
23/32 23/32 1/4 1/4 1/4 1/4 1/4
1 3/4 1 3/4
1 17/32 1 17/32
5/16 5/16 5/16 5/16 5/16
.020
.020 3/8 3/8 3/8 3/8 3/8
2 Turns
2400 rpm
.100 .100 .100 .100 .100
- -
.245 .275 .245 .245 .275
- -
- .450 .450 .450 .450 .450
-
© ® © © ©
- -
7/16 7/16 7/16 13/16 13/16
.066 .067 .076 .075 .078 .078
.076
11/16"
1 3/8"
2 1/4"
.020 .020 .020 .020 .020
H O LL E Y
C arburetor 4150G
396
Engine Displacem ent 366 427
(310)
(H ors e p ow e r) (235) (260)
A ll
T ransm ission A ll A ll
20
Truck Series 50 60
30
P a rt Number
(Mfg. Number)
-
P rim a ry .195 .195
Mechan­
Float
ical
Secondary .250
.250
L e v e l
1/4
Final Sight Plu g
A c c e le ra to r Pump .015 .015
5/16
Idle Vent .060 .060
3/8
Mechanical .035 .035
Fast Idle
Final 1800-2400 rpm
Secondary Stop 1/2 Turn Open
.100
P rim a ry #62 #62
Main M e te r ­
.245
ing Jet
Secondary #68 #68
.450
P rim a ry 1 9/16
Throttle
Bore
Secondary 1 9/16
13/16
.075
.020
>
cn
m
3 0
O
00
c
O
Z
*
m
-4
o
50