LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Buick >> 1968 >> Wildcat Base, Not Available Trans >> Repair and Diagnosis >> Engine Performance >> Tune-Up >> Tune-Up Specifications >> Tune-Up Specifications
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Tune-Up Specifications

ENGINE IGNITION TIMING DISTRIBUTOR SPARK PLUGS CARBURETOR Make & Type No.
Synchro. Irons. Auto. Trans. Cam Angle Point Gap Type Gap
AMERICAN MOTORS                 
199" & 232" 6 Cyl. 1 Bbl. TDC 5° BTDC 31-34° .016" CH. N14Y .033-.037" Car. RBS
Hol. 1931		 1
232" 6 Cyl. 2 Bbl. TDC (5)TDC 31-34° .016" CH. N14Y .033-.037" Car. WCD 2
290" V8 2 Bbl. TDC TDC 29-31 ° .016" CH. N12Y .033-.037" Ford 6200 Car. WCD 3
290" V8 4 Bbl. TDC TDC 29-31° .016" CH. N12Y .033-.037" Car. AFB 4
343" V8 2 Bbl. TDC TDC 29-31° .016" CH. N12Y .033-.037" Ford 6200 5
343" & 390" V8 4 Bbl. TDC TDC 29-31° .016" CH. N12Y .033-.037" Car. AFB 6
BUICK                 
250" 6 Cyl. TDC 4° BTDC 32° .019" AC 46 N (1) Roch. MV 7
350" V8 2 Bbl. TDC TDC 30° .016" AC 45TS .030" Roch. 2 GV 8
350" V8 4 Bbl. TDC TDC 30° .016" AC 45TS .030" Roch. 4MV 9
400" V8 4 Bbl. 2 1/2° ATDC TDC 30° .016" AC 44TS .030" Roch. 4MV 10
430" V8 4 Bbl. - TDC 30° .016" AC 44TS .030" Roch. 4MV II
CADILLAC                 
472" V8 4 Bbl. - 5° BTDC 28-32° .016" AC 44N .035" Roch. 4MV 12
CHEVROLET                 
153" 4 Cyl. TDC 4° BTDC 31-34° (1).019" AC 46N .035" Roch. M 13
230" & 250" 6 Cyl. TDC 4° BTDC 31-34° (1).019" AC 46N .035" Roch. MV 14
302" V8 4 Bbl. 4° BTDC - 28-32° (1).019" AC 43 .035" Hol. 4150 15
307" V8 2 Bbl. 2° BTDC - 28-32° (1).019" AC 45 .035" Roch. 2 GV 16
327" V8 210 HP 2° ATDC 2° BTDC 28-32° (1).019" AC 44 .035" Roch. 2 GV 17
327" V8 250 HP 4° BTDC 4° BTDC 28-32° (1).019" AC44S .035" Roch. 4 MV 18
327" V8 275 HP TDC 4° BTDC 28-32° (1).019" AC 44 .035" Roch. 4 MV 19
327" V8 300 HP 4° BTDC 4° BTDC 28-32° (1).019" AC 44 .035" Roch. 4 MV 20
327" V8 325 HP (4) - 28-32° (1).019" AC 44 .035" Roch. 4 MV 21
327" V8 350 HP (5)4° BTDC - 28-32° (1).019" AC 44 .035" Roch. 4 MV 22
350" V8 4 Bbl. TDC 4° BTDC 28-32° (1).019" AC 44 .035" Roch. 4 MV 23
396" V8 325 HP 4° BTDC 4° BTDC 28-32° (1).019" AC 43N .035" Roch. 4 MV 24
396" V8 350 HP TDC 4° BTDC 28-32° (1).019" AC 43 N .035" Roch. 4 MV 25
396" V8 375 HP 4° BTDC - 28-32° (1).019" AC 43 N .035" Hol. 4150 26
427" V8 385 & 390 HP 4° BTDC 4° BTDC 28-32° (1).019" AC 43 N .035" Roch. 4 MV 27
427" V8 400 HP 4° BTDC 4° BTDC 28-32° (1).019" AC 43N .035" 3-Hol. 2300 28
427" V8 425 HP 4° BTDC - 28-32° (1).019" AC 43N .035" Hol. 4150 29
427" V8 430 HP 12° BTDC - 28-32° (1).019" AC 43XL .035" Hol. 4150 30
427" V8 435 HP 4° BTDC - 28-32° (1).019" AC 43N .035" 3-Hol. 2300 31
CHRYSLER CORP.                 
170" 6 Cyl. 5° ATDC 2 1/2° ATDC 40-45° .017-.023" CH. N14Y .035" Car. BBS 32
225" 6 Cyl. TDC TDC 40-45° .017-.023"] CH. N14Y .035" Hol. 1920 Car. BBS 33
273" V8 5° ATDC 2 1/2° ATDC 28-33° .014-.019" CH. N14Y .035" Car. BBD 34
318" V8 5° ATDC 2 1/2° ATDC 28-33° .014-.019" CH. N9Y .035" Car. BBD 35
340" V8 TDC 5° BTDC 28-33° .014-.019" CH. N9Y .035" Car. AVS 36
SPARK PLUGS: AL  -AUTOLITE, CH  -CHAMPION
CARBURETORS: Car.  -CARTER, Hol  .-HOLLEY, Roch  .-ROCHESTER, Str  .-STROMBERG
No. HOT IDLE FAST IDLE Initial Idle Mixture Air Fuel Ratio Remarks
Synchro Trans. Auto. Trans. Synchro Trans. Auto. Trans.
RPM Com Step RPM Cam Step
1 600 525 1600 (1) 1600 (1) 1 Turn (2) (1) Hol. 1931-2nd Car, RBS-High
(2) See Chevrolet (6)
(3) Car. WCD-High;
(4) Ford 6200-Index at 1600 RPM
(5) Rogue-5° BTDC
2 600 525 1600 High 1600 High 1 Turn (2)
3 650 550 2000 (3) (4) 2000 (3) (4) 1 Turn (2)
4 650 550 2000 High 2000 High 2-3 Turns (2)
5 650 550 2000 (4) 2000 (4) 2-3 Turns (2)
6 650 550 2000 High 2000 High 2-3 Turns (2)
7 700 (2)500 720 Low 520 Low 1 1/2 Turns (3) (1).035"-Synchro.030"-Auto
(2) Set in drive
(3) See Chevrolet (6)
8 700 550 720 Low 570 Low 1 1/2 Turns (3)
9 700 550 720 Low 570 Low 1 1/2 Turns (3)
10 700 600 720 Low 570 Low 1 1/2 Turns (3)
11 - 550 - - 570 Low 1 1/2 Turns (3)
12 - 550 - - (P1900-1950 High 1 1/2 Turns (2) (1) A/C off, trans, in neutral
(2) See Chevrolet (6)
13 750 600 2400 High 2400 High 3 Turns (6) (1) Used points-.016"
(2) A/C on
(3) Correct when hot idle set at specified RPM
(4) Dist. 111144-4° BTDC Dist. 1111478-8° BTDC
(5) Dist. 1111475, 477-8° BTDC
(6) A/F ratio not available, tune engine for smoothest idle with highest vacuum reading at leanest mixture setting
14 700 (1)500 2400 High 2400 High 3 Turns (6)
15 900 - 2200 High - - 3 Turns (6)
16 700 - (3) - - - 3 Turns (6)
17 700 600 (3) - (3) - 3 Turns (6)
18 (2)700 600 2400 High 2400 High 3 Turns (6)
19 (2)700 600 2400 High 2400 High 3 Turns (6)
20 (2)700 600 2400 High 2400 High 3 Turns (6)
21 (2)755 - 2400 High - - 3 Turns (6)
22 (2)755 - 2400 High - - 3 Turns (6)
23 700 600 2400 High 2400 High 3 Turns (6)
24 (2)700 600 2400 High 2400 High 3 Turns (6)
25 (2)700 600 2400 High 2400 High 3 Turns (6)
26 (2)700 - 2200 High - - 3 Turns (6)
27 700 600 2400 High 2400 High 3 Turns (6)
28 750 600 2200 High 2400 High 3 Turns (6)
29 750 - 2200 High - - 3 Turns (6)
30 1000 - 2200 High - - 3 Turns (6)
31 750 - 2200 High - - 3 Turns (6)
32 (1)700 (1)650 1550 2nd 1700 2nd 1 1/2 Turns 14.2 (1) Set idle with lights on.
33 (1)650 (1)650 1550 2nd 1550 2nd 1 1/2 Turns 14.2
34 700 650 1400 2nd 1600 2nd 1 1/2 Turns 14.2
35 650 600 1300 2nd 1500 2nd 1 1/2 Turns 14.2
36 700 650 1700 2nd 1400 2nd 1 1/2 Turns 14.2
ENGINE IGNITION TIMING DISTRIBUTOR SPARK PLUGS CARBURETOR Make & Type No.
Synchro. Trans. Auto. Trans. Cam Angle Point Gap Type Gap
CHRYSLER CORP. (Cont.)                 
383" V8 2 Bbl. TDC 7 1/2° BTDC 28-33° .01 4-.01 9" CH. J14Y .035" Car. BBD 1
383" V8 4 Bbl. TDC 5° BTDC 28-33° .014-.019" CH. J14Y .035" Car. AVS 2
426" V8 TDC 7 1/2° BTDC (3)28-33° .014-.019" CH. N10Y .035" 2-Car. AFB 3
440" V8 - 7 1/2° BTDC 28-33° .014-.019" CH. J13Y .035" Hol. 4160 4
440" V8 HP TDC 5° BTDC (3)27-32° .014-.019" CH. J11Y .035" Car. AVS 5
CORVAIR                 
95 HP 6 Cyl. 6° BTDC 14° BTDC 31-34° (1).019" AC 46FF .035" Roch. HV 6
110 HP 6 Cyl. 4° BTDC 12° BTDC 31-34° (1).019" AC 44FF .030" Roch. HV 7
140 HP 6 Cyl. 4° BTDC 4° BTDC 31-34° (1).019" AC 44FF .030" 2-Roch. H 8
FORD                 
170" 6 Cyl. 6° BTDC 6° BTDC 35-40° .027" AL. BF82 .032-.036' Car. YF 9
200" 6 Cyl. 6° BTDC 6° BTDC 35-40° .027" AL. BF82 .032-.036' Ford MOO 10
240" 6 Cyl. 6° BTDC 6° BTDC 35-40° .027" AL. BF42 .032-.036' Car. YF 11
289" V8 2 Bbl. 6° BTDC 6° BTDC 24-29° .021" AL. BF42 .032-.036' Ford 2100 12
289" V8 HP 6° BTDC 6° BTDC 30-33° .020" AL. BF32 .032-.036' Ford 2100 13
302" V8 2 Bbl. 6° BTDC 6° BTDC 24-29° .021" AL.BF42 .032-.036' Ford 2100 14
302" V8 4 Bbl. 6° BTDC 6° BTDC (3)24-29° (3).021" AL. BF42 .032-.036' Ford 4300 15
390" V8 2 Bbl. 6° BTDC 6° BTDC (4)26-31 ° (4).017" AL. BF42 .032-.036' Ford 2100 16
390" V8 4 Bbl. 6° BTDC 6° BTDC 24-29° .021" AL. BF42 .032-.036' Ford 4300 17
390" V8 GT 6° BTDC 6° BTDC 26-31° .016" AL. BF32 .032-.036' Hol. 4150 18
427" V8 4 Bbl. - 6° BTDC 26-31° .017" AL. BF42 .032-.036' Hol. 4150 19
428" V8 4 Bbl. 6° BTDC 6° BTDC (5)24-29° (5).021" AL. BF42 .032-.036' Ford 4300 20
428" V8 Police - 6° BTDC 26-31° .017" AL. BF32 .032-.036' Ford 4100 21
428" V8 C.J. 6° BTDC 6° BTDC 26-31° .017" AL. BF32 .032-.036' Ford 4300 22
429" V8 4 Bbl. - 6° BTDC 26-31° .017" AL.BF42 .032-.036' Ford 4300 23
460" V8 4 Bbl. - 10° BTDC 26-31° .017" AL. BF42 .032-.036' Ford 4300 24
462" V8 4 Bbl. - 10° BTDC 26-31° .017" AL. BT42 .032-.036' Car. AFB 25
OLDSMOBILE                 
250" L6 TDC 4° BTDC 31-34° .019" AC 46N .035" Roch. MV 26
350" V8 2 Bbl. 5° BTDC 5° BTDC 28-32° .016" AC 45S .030" Roch. 2GC 27
350" V8 4 Bbl. 7 1/2° BTDC 7 1/2° BTDC 28-32° .016" AC 44S .030" Roch. 4MV 28
400" V8 2 Bbl. 5° BTDC 5° BTDC 28-32° .016" AC 45S .030" Roch. 2GC 29
400" V8 4 Bbl. (4)2.5 BTDC 7 1/2° BTDC 28-32° .016" AC 45S .030" Roch. 4MV 30
455" V8 310 HP.2 Bbl. (3)5° BTDC (3)5° BTDC 28-32° .016" AC 45S .030" Roch. 2GC 31
455" V8 4 Bbl. (4)7 1/2° BTDC (4)7 1/2° BTDC 28-32° .016" AC 45S .030" Roch. 4MV 32
PONTIAC                 
250" 6 Cyl. 1 Bbl. TDC TDC 32° .019" AC 44N .035" Roch. MV 33
250" 6 Cyl. 4 Bbl. 5° BTDC 5° BTDC 32° .019" AC 44N .035" Roch. 4MV 34
All V8 9° BTDC 9° BTDC 32° .016" AC 45S .035" Roch. 2 GV Roch 4MV 35
SPARK PLUGS: AL  -AUTOLITE, CH.-CHAMPION
CARBURETORS: Car  .-CARTER, Hol  .-HOLLEY, Roch  .-ROCHESTER, Str  .-STROMBERG
No. HOT IDLE FAST IDLE Initial Idle Mixture Air Fuel Ratio Remarks
Synchro Trans. Auto. Trans. Synchro Trans. Auto. Trans.
RPM Cam Step RPM Cam Step
1 650 600 1600 2nd 1600 2nd 1 1/2 Turns 14.2 (4) Trans. in Neutral
2 650 650 1600 2nd 1600 2nd 1 1/2 Turns 14.2
3 750 750 1800 2nd 1800 2nd 1 1/2 Turns 14.2
4 - 600 - - 1400 2nd 1 1/4 Turns 14.2
5 650 650 1600 - (2)1400 2nd 1-2 Turns 14.2
6 700 600 (2) 2nd (2) 2nd 1 Turn (3) (1) Used points -.016"
(2).075" between idle screw and throttle lever.
(3) See Chevrolet(1)
7 700 600 (2) 2nd (2) 2nd 1 Turn (3)
8 650 550 (2) 2nd (2) 2nd 1 Turn (3)
9 700 550 (1) - (1) - 1 1/2 Turns (2) (1) Bench adjustment on Car.
(2) See Notes at end of this Section.
(3) 302" 4 Bbl. Auto set: Dist. gap-.017" Cam Angle-26-31°
(4) Reg. fuel with Synchro: Dist. gap-.021" Cam angle-24-29°
(5) Auto. Trans. Dist. gap-.017" Cam angle-26-31 °
10 700 550 1400 Center 1500 Center 1 1/2 Turns (2)
11 600 500 (1) - (1) - 1 1/2 Turns (2)
12 625 550 1200 Center 1400 Center 1 1/2 Turns (2)
13 625 550 1200 Center 1400 Center 1 1/2 Turns (2)
14 625 550 1200 Center 1400 Center 1 1/2 Turns (2)
15 625 550 1250 Center 1400 Center 1 1/2 Turns (2)
16 625 550 11300 Center 1500 Center 1 1/2 Turns (2)
17 625 550 1300 Center 1400 Center 1 1/2 Turns (2)
18 700 550 1900 Center 2100 Center 1 1/2 Turns (2)
19 - 600 - _ 2100 Center 1 1/2 Turns (2)
20 625 550 1300 Center 1400 Center 1 1/2 Turns (2)
21 - 600 - - 1350 Center 1 1/2 Turns (2)
22 700 750 1900 Center 2100 Center 1 1/2 Turns (2)
23 - 550 - - 1500 High 1 1/2 Turns (2)
24 - 550 - - 1500 High 3 1/2 Turns (2)
25 - 550 - - 1500 High 3 1/2 Turns (2)
26 (1) (1) 650 Low 650 Low 5 Turns (5) (1) See Notes at end of this Section.
(2) Double snorkel at 1300 RPM
(3) 320 HP set at 7 1/2" BTDC
(4) Double snorkel set at 10° BTDC
(5) See Chevrolet (6)
27 (1) (1) 900 Low 900 Low 2 Turns (5)
28 675 575 700 Low 700 Low 2 Turns (5)
29 625 575 900 Low (2)900 Low 2 Turns (5)
30 695 725 900 Low (2)900 Low 2 Turns (5)
31 695 725 900 Low (2)900 Low 2 Turns (5)
32 - 575 700 Low 700 Low 2 Turns (5)
33 (1) (1) 2400 Top 2400 Top 5 Turns (3) (1) See Notes of end of this Section.
(2) RAM Air set at 2800
(3) See Chevrolet (6)
34 (1) (1) 2600 Top 2800 Top 2 Turns (3)
35 (1) (1) (2)2500 Top (2)2500 Top 6 Turns (3)
scientia non olet · About LEMON Manuals