Pontiac tempest 1968 Service Manual page 293

6 - 7 6 1968 P O N T I A C SERVICE M A N U A L
V-8
E N G I N E W R E N C H T O R Q U E
S P E C I F I C A T I O N S
N O T E : Torque in lb. ft. unless otherwise shown.
Application Torque L b . - F t . Application Torque L b . - F t .
Bolt - Main Bearing Cap to Block . . • . . , . . . . , . 100
Bolt - Rear Main Bearing Cap to Block . . 120
Bolt - Cylinder Head . . . . . . . . . . 95
Bolt - Flywheel to Crankshaft . 95
Nut - Connecting Rod Bearing Cap 43
Bolt - O i l Pan to Block . . . 12
Bolt - O i l Pump to Block 30
Bolt - Exhaust Manifold to Head . . . 30
Bolt - Intake Manifold to Head . . . . . . . . . 40
Bolt - Camshaft to Sprocket < > < > 40
Nut - Rocker Arm to Stud . 20
Stud - Rocker Arm . 50
Spark Plug to Head . . 20
V - 8 E N G I N E S P E C I F I C A T I O N S
Type 90° V - 8 0 . H . Valve
Bore and Stroke
(350 c u . i n . ) 3 - 7 / 8 " x 3 - 3 / 4 "
(400 c u . i n . ) . 4.120" x 3 - 3 / 4 "
(428 c u . i n . ) . . . . 4.120" x 4"
Taxable Horsepower
(350 c u . i n . ) . .
0
4 4 . 3
(400 c u . i n . ) . . . . . . . . . . . . . . . 5 4 . 3
(428 c u . i n . ) . .
0
. .. . . . 5 4 . 3
H O R S E P O W E R A N D T O R Q U E
Compression
Engine
Carburetor
Ratio Horsepower Torque
350 2-BBL 9.2 265
( c
£4600
355 @ 2800
350 Q ' J e t
10.5 320
( c
£5100
380 @ 3200
400 (Tempest) 2-BBL 8.6 265 (t £4600
397 @ 2400
400 (Tempest) Q - J e t 10.75
350
( c
£ 5000 445 @ 3000
400 HO (Tempest)
Q ' J e t 10.75 360
(c
£ 5100 445 @ 3600
400 Ram-Air (Tempest) Q ' J e t 10.75
360 (c £ 5 4 0 0 445 @ 3800
400 (Firebird)
9'Jet
10.75
330
( c
£ 4 8 0 0
430 @ 3300
400 HO (Firebird)
Q ' J e t 10.75
335
( c
£ 5 0 0 0
430 @ 3400
400 Ram-Air (Firebird)
Q ' J e t
10.75 335 ( < £ 5 3 0 0
430 @ 3600
400 2-BBL
8.6
265
(c
£ 4 4 0 0 397 @ 2400
400 2-BBL
10.5
290 a £ 4 6 0 0
428 @ 2500
400 MT & AT
Q ' J e t
10.5
340
d
£ 4 8 0 0
445 @ 2900
400 G P MT & AT Q ' J e t
10.5
350
( c
£ 5000
445 @ 3000
428 Q ' J e t 10.5 375 @ 4800
472 @ 3200
428 H O Q ' J e t 10.75
390
( c
£ 5 2 0 0
465 @ 3400
Compression Pressure at Cranking Speed
(8.6:1 and 9.2:1 Compression Ratio-Regular Fuel) . . . . . . . . . . . . . . . . . . . . . 150-170 PSI @ 155-165 RPM
Compression Pressure at Cranking Speed
(10.5:1 Compression Ratio-Premium Fuel)
(10.75:1 Compression R a t i o - G T O & 428 HO) . . .
0
. . . . . . . . . . 185-210 PSI @ 155-165 RPM
Firing Order 1 - 8 - 4 - 3 - 6 - 5 - 7 - 2
Car-Engine Serial N o . Location Front Face of Right Cylinder Bank
Production Engine N o . Location Front Face of Right Cylinder Bank
Cylinder Nos.-Front to Rear
Left Bank 1-3-5-7
Right Bank . . . . 2 - 4 - 6 - 8
Cylinder Block
Material . . Alloy Cast Iron
Installation Angle >
Pontiac . . . 4°
Tempest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4° 42'
Firebird 3° 35'
Cylinder Heads
Material . . Alloy Cast Iron
Combustion Chamber Quenchless Type - Fully Machined