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CORVETTE

 

1965-75 Tune-up Specifications

 
Year Engine Car Model Spark Plug Type
(AC)
- Gap
Point Gap Dwell Angle Firing Order Ignition Timing (BTDC or Mark)
1
Hot Idle
3
Std.Tran Auto Tran
2
1965 V8-327
250hp
44 -.035
4
28-32 18436572 475 475D
V8-327
300hp
44 -.035
4
28-32 18436572 475 475D
V8-327
350hp
44 -.035
4
28-32 18436572 665 -
V8-327
365hp
44 -.035
4
28-32 18436572 12° 765 -
V8-327
375hp
44 -.035
4
28-32 18436572 12° 850 -
V8-396
425HP
43N -.035
4
28-32 18436572 10° 800 -
1966 8-327
300hp
44 -.035
4
28-32 18436572 500 500D
8-327
300hp 13
44 -.035
4
28-32 18436572 4° ATC 700 -
8-327
300hp 14
44 -.035
4
28-32 18436572 4° ATC - 600D
8-327
350hp
44 -.035
4
28-32 18436572 10° 700 -
8-327
350hp 12
44 -.035
4
28-32 18436572 10° 700 -
8-427
390hp
43N -.035 - - 18436572 550 550D
8-427
390hp 12
43N -.035 - - 18436572 600 550D
8-427
425hp
43N -.035 - - 18436572 800 -
1967 8-327
300hp
44 -.035 .019 28-32 18436572 500
11
500D
11
8-327
300hp 13
44 -.035 .019 28-32 18436572 4° ATC 700
16
600D
16
8-327
300hp 14
44 -.035 .019 28-32 18436572 4° ATC 700
16
600D
16
8-427
390hp
43N -.035 .019 28-32 18436572 550
11
550D
11
8-427
390hp 12
43N -.035 .019 28-32 18436572 700
11
550D
11
8-427
400hp
43N -.035 .019 28-32 18436572 550
11
550D
11
8-427
400hp 12
43N -.035 .019 28-32 18436572 750
11
600D
11
8-427
425hp
43N -.035 .019 28-32 18436572 12°
17
1000
11
-
8-427
435hp
43N -.035 .019 28-32 18436572 750
11
-
8-427
435hp 12
43N -.035 .019 28-32 18436572 750
11
-
1968 8-327
300hp
44 -.035 .019 28-32 18436572 700
11
600D
16
8-327
350hp
44 -.035 .019 28-32 18436572 750
11
-
8-427
390hp
43N -.035 .019 28-32 18436572 1000
11
600D
16
8-427
400hp
43N -.035 .019 28-32 18436572 1000
11
600D
16
8-427
425hp
43N -.035 .019 28-32 18436572 750
16
-
8-427
430hp
43XL -.035 .019 28-32 18436572 12° 1000
16
-
8-427
435hp
43N -.035 .019 28-32 18436572 750
16
-
1969   8-350
300hp 18
R44 -.035 .019 28-32 153624 700
16
-
8-350
300hp 19
R44 -.035 .019 28-32 153624
-
600D
16
8-350
350hp
R44 -.035 .019 28-32 18436572 750
16
-
8-350
370hp
R43-.035 .019 28-32 18436572
20
750
16
-
8-427
390hp
R43N-.035 .019 28-32 18436572 800
11
600D
11
8-427
400hp
R43N-.035 .019 28-32 18436572 800
11
600D
11
8-427
425hp
R43N-.035 .019 28-32 18436572 750
16
750
D 16
8-427
430hp
R43XL-.035 - - 18436572 12°
5
1000
16
-
8-427
435hp
R43N-.035 - - 18436572 750
16
750
D 16
1970 8-350
300hp
R44-.035 .019 29-31 18436572 700 600
8-350
350hp
R44-.035 .019 29-31 18436572 750 -
8-350
370hp
R43-.035 - - 18436572 900 -
8-454
390hp
R43T-.035 .019 29-31 18436572 700 600
8-454
460hp
R43XL-.035 - - 18436572 700 600
1971 8-350
270hp
R44TS-.035 .019 29-31 153624 600 550D
8-350
330hp
R43TS-.035 - - 18436572 700 -
8-350
365hp
R43TS-.035 .019 29-31 18436572 600 600D
8-454
425hp 18
R44TS-.035 - - 18436572 700 -
8-454
425hp 19
R44TS-.035 - - 18436572 12° - 700D
1972 8-350
200hp
R44T -.035
4
29-31 18436572 800 600D
8-350
255hp
R44T -.035
4
29-31 18436572 900 -
8-455 R44T -.035
4
29-31 18436572 750 600D
1973 8-350
190hp
R44T-.035
4
29-31 18436572 12° 900 600D
8-350
250hp
R44T-.035
4
29-31 18436572 900 700D
8-455
275hp
R44T-.035
4
29-31 18436572 10° 900 600D
1974 8-350
195hp 18
R44T-.035
4
29-31 153624
6
900 -
8-350
195hp 19
R44T-.035
4
29-31 18436572 - 600D
8-350
250hp
R44T-.035
4
29-31 18436572 900 700D
8-454 R44T-.035
4
29-31 18436572 10° 800 600D
1975 8-350
18
R44TX-.060 - - 18436572
6
800 600D
8-350
19
R44TX-.060 - - 18436572 800 700D
 

1- BTDC - Before top dead center

2 - D- Drive N- neutral

3 - Where two speeds are listed, lower speed indicates idle solenoid disconnected

4 - New points .019, used .016. On V8 turn adjusting screw in clockwise until engine misfires, then back off 1/2 turn.

5 - Adjust timing at 800 rpm

6 - CA set at 4° BTDC

9- Early production 750 rpm. Engine date stamped 1118 QA or QB, 950-1000 rpm

10- Transistor Ign. 6° BTDC

11- With A/C on

12- With Air Injection Reactor system (A.I.R)

13- Manual tran & A.I.R system

14-Auto tran & A.I.R system

15-After top dead center

16- With A/C off

17- At 800 rpm

18- With standard tranny

19- With Auto tranny

20- With distributor 1111496 set at 12°