Year
|
Engine or
Car Model
|
Spark Plug
Type (AC)
- Gap
|
Point
Gap
|
Dwell
Angle
|
Firing
Order
|
Ignition Timing
(BTDC or Mark)1
|
Hot Idle
|
Std.
Tran
|
Auto
Tran 2
|
1965
|
6-215 3
|
46N -.035
|
.016
|
31-34
|
153624
|
4°
|
590 4
|
490D 4
|
V8-326
|
45S -.035
|
5
|
30
|
18436572
|
6°
|
590 4
|
490D 4
|
V8-389,421
|
45S -.035
|
5
|
30
|
18436572
|
6°
|
525 4
|
500D 4
|
1966
|
6-230
|
44S -.035
|
.016
|
31-34
|
153624
|
5°
|
600 4
|
500D 4
|
6-230 With A.I.R 6
|
44S -.035
|
.016
|
31-34
|
153624
|
5° ATC
|
700 7
|
600D 7
|
V8s
|
45S -.035
|
5
|
30
|
18436572
|
6°
|
600 4
|
500D 4
|
V8s With A.I.R 6,8
|
45S -.035
|
5
|
30
|
18436572
|
4° ATC
|
700 7
|
600D 7
|
Tri-Carb
|
44S -.035
|
5
|
30
|
18436572
|
6°
|
600 4
|
500D 4
|
Tri-Carb 6
|
44S -.035
|
5
|
30
|
18436572
|
6°
|
700 7
|
600D 7
|
1967
|
6-230
|
44N -.035
|
.016 |
31-34 |
153624 |
5° |
600
4 |
500D
4 |
6-230 With A.I.R 6
|
44N
-.035 |
.016 |
31-34 |
153624 |
TDC |
700 7
|
600D 7
|
8-326, 400
2 bar carb
|
45S -.035
|
5
|
30
|
18436572
|
6°
|
600 4
|
500D 4
|
8-326, 400
2 bar carb 6
|
45S -.035
|
5
|
30
|
18436572
|
6°
|
700 9
|
600D 9
|
8-326, 400
4 bar carb
|
45S -.035
|
5
|
30
|
18436572
|
6°
|
600 4
|
600D 4
|
8-326, 400
2 bar carb 6
|
45S -.035
|
5
|
30
|
18436572
|
6°
|
700 9
|
600D 9
|
8-400 Hi perf
|
44S -.035
|
5
|
30
|
18436572
|
6°
|
700 4
|
600D 4
|
8-428
|
44S -.035
|
5
|
30
|
18436572
|
6°
|
700 4
|
650D 4
|
8-428 With A.I.R
|
44S -.035
|
5
|
30
|
18436572
|
6°
|
700 7
|
650D 7
|
1968
|
6-250 1 bar carb
|
44N -.035
|
.016 |
31-34 |
153624 |
TDC |
700/
500 7
|
600/
500 7
|
6-250 4 bar carb
|
44N -.035
|
.016
|
31-34
|
153624
|
4°
|
800/
600 7
|
600/
500 7
|
8-350
|
45S -.035
|
.016
|
28-32
|
18436572
|
9°
|
650/
500 7
|
650/
500 7
|
8-400 Firebird
|
44S -.035
|
.016
|
28-32
|
18436572
|
9°
|
850/
600 7
|
650/
500 7
|
8-400 Firebird H.O.
|
44S -.035
|
.016
|
28-32
|
18436572
|
9°
|
850/
600 7
|
650/
500 7
|
Firebird Ram Air
|
44S -.035
|
.016
|
28-32
|
18436572
|
9°
|
1000/
650 7
|
650/
500 7
|
Pontiac 400
2 bar carb
|
45S -.035
|
.016
|
28-32
|
18436572
|
9°
|
800/
500 7
|
600/
500 7
|
Pontiac 400
4 bar carb
|
45S -.035
|
.016
|
28-32
|
18436572
|
9°
|
850/
650 7
|
600/
500 7
|
8-428
|
44S -.035
|
.016
|
28-32
|
18436572
|
9°
|
650/
500 7
|
650/
500 7
|
1969
|
6-250 1 bar carb
|
R44NS -.035
|
.016
|
31-34
|
153624
|
TDC
|
700/
500
|
600/
500D 7
|
6-250 4 bar carb
|
R44NS -.035
|
.016
|
31-34
|
153624
|
5°
|
850/
600
|
600/
500D 7
|
8-350 2 bar carb
|
R45S -.035
|
.016
|
30
|
18436572
|
9°
|
850
|
650D 7
|
8-350 4 bar carb
|
R45S -.035
|
.016
|
30
|
18436572
|
9°
|
1000
|
650D 7
|
8-400 2 bar carb
|
R45S -.035
|
.016
|
30
|
18436572
|
9°
|
850
|
650D 7
|
8-400 4 bar carb
|
10
|
.016
|
30
|
18436572
|
9°
|
700
|
600D
|
8-400 Ram Air
|
10
|
.016
|
30
|
18436572
|
15°
|
1000/
650
|
650/
500D 7
|
8-428
|
R44S -.035
|
.016
|
30
|
18436572
|
9°
|
1000
|
650D 7
|
1970
|
6-250 Std. trans 3
|
R46T -.035
|
.019
|
31-34
|
153624
|
TDC
|
750/
400
|
-
|
6-250 Auto trans 3
|
R46T -.035
|
.019
|
31-34
|
153624
|
4°
|
-
|
600/
400D
|
8-350 2 bar carb
|
R46S -.035
|
.016
|
30
|
18436572
|
9°
|
800
|
650D
|
8-400 2 bar carb
|
R46S -.035
|
.016
|
30
|
18436572
|
9°
|
800
|
650D
|
8-400 4 bar carb
|
R45S -.035
|
.016
|
30
|
18436572
|
9°
|
950
|
650D
|
8-400 Ram Air
|
R44S -.035
|
.016
|
30
|
18436572
|
15°
|
1000/
650
|
750/
500D
|
8-455
|
R45S -.035 11
|
.016
|
30
|
18436572
|
9°
|
950
|
650D
|
1971
22
|
6-250 3
|
R46TS -.035
|
.019
|
32.5
|
153624
|
4°
|
850/
550
|
650/
500D
|
8-307 Std. trans 3
|
R45TS -.035
|
.019
|
30
|
18436572
|
4°
|
550
|
-
|
8-307 Auto trans 3
|
R45TS -.035
|
.019
|
30
|
18436572
|
8°
|
-
|
550D
|
8-350 2 bar carb
|
R47S -.035
|
.016
|
30
|
18436572
|
12°
|
800
|
600D
|
8-400 2 bar carb
|
R47S -.035
|
.016
|
30
|
18436572
|
8°
|
-
|
600D
|
8-400 4 bar carb
|
R46S -.035
|
.016
|
30
|
18436572
|
12°
|
1000/
600
|
700D
|
V8-455
|
R46S -.035
|
.016
|
30
|
18436572
|
12°
|
-
|
650D
|
V8-455 H.O.
|
R46S -.035
|
.016
|
30
|
18436572
|
12°
|
1000/
600
|
700D
|
1972
22
|
6-250 3
|
R46T -.035
|
.019
|
32.5
|
153624
|
4°
|
850/
450
|
650/
450D
|
8-307 Std. trans 3
|
R44T -.035
|
.016
|
30
|
18436572
|
4°
|
900/
450
|
-
|
8-307 Auto trans 3
|
R44T -.035
|
.016
|
30
|
18436572
|
8°
|
-
|
600/
450D
|
8-350
|
R46TS -.035
|
.016
|
30
|
18436572
|
8°
|
800
|
-
|
8-350
|
R46TS -.035
|
.016
|
30
|
18436572
|
10°
|
-
|
625D
|
8-400 2 bar carb
|
R46TS -.035
|
.016
|
30
|
18436572
|
10°
|
-
|
625D
|
8-400 4 bar carb
|
R45TS -.035
|
.016
|
30
|
18436572
|
10°
|
1000/
600
|
700/
500D
|
V8-455 2 bar carb
|
R45TS -.035
|
.016
|
30
|
18436572
|
10°
|
-
|
625D
|
V8-455 4 bar carb
|
R45TS -.035
|
.016
|
30
|
18436572
|
10°
|
-
|
650/
500D
|
V8-455 H.O.
Std. trans
|
R45TS -.035
|
.016
|
30
|
18436572
|
8°
|
1000/
600
|
-
|
V8-455 H.O.
Auto trans
|
R45TS -.035
|
.016
|
30
|
18436572
|
10°
|
-
|
700/
500D
|
1973
22
|
6-250
|
R46T -.035
|
12
|
32.5
|
153624
|
6°
|
750/
450
|
600D
|
6-350 Std. trans
|
R46T -.040
|
.019
|
30
|
18436572
|
10°
|
900
/600
|
-
|
8-350 Auto trans
|
R46TS -.040
|
.016
|
30
|
18436572
|
12°
|
-
|
650D
|
8-400 2 bar carb
|
R46TS -.040
|
.016
|
30
|
18436572
|
13
|
-
|
650D
|
8-400 4 bar carb
|
R45TS -.040
|
.016
|
30
|
18436572
|
13
|
1000/
600
|
650D
|
8-455
|
R45TS -.040
|
.016
|
30
|
18436572
|
13
|
1000
|
650D
|
8-455 S.D.
|
R44TS -.040
|
.016
|
30
|
18436572
|
13
|
1000/
600
|
750/
500D
|
1974
22
|
6-250
|
R46T -.035
|
12
|
32.5
|
153624
|
6°
|
850
|
600D
|
8-350 2 bar carb
|
R46TS -.040
|
12
|
30
|
18436572
|
13
|
900
|
650D
|
8-350 2 bar carb 14
|
R46TS -.040
|
12
|
30
|
18436572
|
10°
|
-
|
625D
|
8-350 4 bar carb
|
R46TS -.040
|
12
|
30
|
18436572
|
13
|
1000
|
650D
|
8-350 4 bar carb 14
|
R46TS -.040
|
12
|
30
|
18436572
|
10°
|
-
|
625D
|
8-400 2 bar carb
|
R46TS -.040
|
12
|
30
|
18436572
|
13
|
-
|
650D
|
8-400 2 bar carb 14
|
R46TS -.040
|
12
|
30
|
18436572
|
10°
|
-
|
625D
|
8-400 4 bar carb
|
R45TS -.040
|
12
|
30
|
18436572
|
13
|
1000
|
650D
|
8-400 4 bar carb 14
|
R45TS -.040
|
12
|
30
|
18436572
|
10°
|
-
|
625D
|
8-455
|
R45TS -.040
|
12
|
30
|
18436572
|
13
|
-
|
625D
|
8-455 14
|
R45TS -.040
|
12
|
30
|
18436572
|
10°
|
-
|
650D
|
8-455 SD
|
R44TS -.040
|
12
|
30
|
18436572
|
12°
|
1000
|
750D
|
1975
22
|
6-250
|
R46TX -.060
|
-
|
-
|
153624
|
10°
|
800
|
650D
|
8-260 15
|
R46SX -.080
|
-
|
-
|
18436572
|
16°
|
750
|
650D
|
8-260 14,15
|
R46SX -.080
|
-
|
-
|
18436572
|
18°
|
750
|
650D
|
8-350
|
R46TSX -.060
|
-
|
-
|
18436572
|
19
|
800
|
20
|
8-350 16
|
R45TSX -.060
|
-
|
-
|
18436572
|
12°
|
800
|
600D
|
8-400 2 bar carb
|
R46TSX -.060
|
-
|
-
|
18436572
|
16°
|
800
|
650D
|
8-400 2 bar carb 17
|
R45TSX -.060
|
-
|
-
|
18436572
|
16°
|
800
|
650D
|
8-400 4 bar carb 18
|
R45TSX -.060
|
-
|
-
|
18436572
|
21
|
800
|
650D
|
8-400 4 bar carb 14
|
R45TSX-.060
|
-
|
-
|
18436572
|
12°
|
800
|
650D
|
8-455
|
R45TSX-.060
|
-
|
-
|
18436572
|
16°
|
800
|
650D
|
8-455 14
|
R45TSX-.060
|
-
|
-
|
18436572
|
10°
|
800
|
625D
|
|
|
1
- BTDC - Before top dead center
2
-
D- Drive N- neutral
3 - SEE Chevrolet for service
procedure
4 - If A/C, A/C turned to Full On
position
5 - Turn adjusting screw in
Clockwise until engine misfires,
then turn screw out 1/2 turn
|
6 - With Air Injection reactor
emission system (A.I.R)
7- With A/C off
8- Tempest with manual trans
9- 100 rpm higher with A/C
10- GTO uses R44S, all others R45S
11- Use R44s on Ram Air
TDC- Top dead center
|
12- New .019, used .016
13- Manual tran 10°, auto 12°
14- CA
15-SEE Oldsmobile for service
procedure
16- Ventura only SEE Buick for
service procedure
ATC- After top center
|
17- All except Firebird, Grand Prix,
and CA
18- Firebird, Grand Prix except CA
19- Manual tran 12°, auto 16°
20- 2 bar carb 600rpm,
4 bar carb 650 rpm
21- Manual tran 12°, auto 10°
22- Exc Astre
|
