 |
| Configuration
|
90º OHV V-8 with cast-iron
or aluminum blocks and heads |
| Cylinders (Front to Back)
|
Drivers side: 1-3-5-7 - Passenger
side: 2-4-6-8 |
| Firing
Order |
Clockwise on distributor:
1-8-4-3-6-5-7-2 (Gen. I, II and Vortec) - 1-8-7-2-6-5-4-3 (Gen.
III with eight coils) Computer controlled, no distributor. |
| Crankshaft |
Gen. I, II and Vortec: Forged
or cast, five main bearings, thrust on rear bearing. Gen III:
Cast, live main bearing, thrust on #3 center main bearings. |
| Crankshaft
Journal Dia. |
1955 - 1968:
Small Journal: Mains 2.30" - Rods 2.00" | 1967 - 1996:
Med Journal: Mains 2.45" - Rods 2.10" | 1970 - 1980:
400 Crank: Mains 2.65" - Rods 2.10" | 1997 - Up:
Gen. III: Mains 2.558" - Rods 2.10" |
| Crank strokes |
Small Journal: 3.0" and
3.25" | Medium Journal: 3.0" - 3.10" - 3.25"
- 3.48" | 400 Crank: 3.75" | Gen. III 350 LS1:
3.62" |
| Rod
Length |
Forged Steel 5.7"
center to center - 5.565" 400 Rod - 5.940" Gen. II 265
CID L-99 V-8 - 6.098 Gen. III 350 LS1 |
| Pistons |
Cast, hypereutectic or forged aluminum
slipper skirt design |
| Lubrication
|
Full pressure oiling,
wet sump. Some Bowtie blocks offered for dry sump Gen. III uses
crank-driven front generator pump. |
| Block Bores |
3.50" - 4.126" |
| Bore
Centerlines |
4.040" |
| Cubic Inch Displacement
|
262 - 265 - 267 - 283 - 302 - 305 -
307 - 327 - 346(Gen. III) - 350 - 400 |
| Compression
Ratios |
8.0:1 - 11.0:1 |
| Induction |
2-bbl - 4-bbl - inline 2 x 4-bbl - Crossram
2 x 4-bbl - Rochester Mechanical Fuel Injection - Throttle Body
Fuel Injection (TBI) - Crossfire 2 x TBI - Tuned Port Fuel Injection
(TPI) - Fuel Injection with Calloway Twin Turbochargers - Sequential
Fuel Injection with mass airflow sensor. |
| Engine
Weight |
Approx 550 lbs, all
cast-iron and approx 450 lbs, all aluminum and Gen. III LS1 |
|
| Main
Bearings |
.002" - .003
|
| Crank End Thrust
|
.005" - .007" |
| Rod
Bearings |
.002" - .0025"
|
| Rod Side Bearings
|
.010" - .020" |
| Piston
to Bore |
Follow recommendation
of piston maker |
| Valve Lash |
Follow recommendation of cam maker |
| Min.
Piston Ring End Gap |
Follow recommendation
of ring maker |
| Min. Piston Deck to Head
Deck |
.035 - .040" with steel rods, more
may be needed with aluminum rods |
| Open
Valve to Piston Deck |
Minimum of .045"
on a stock engine - .100" on a HP or race engine |
| Spark Plug Gap |
.035" with GM point ignition -
.045" with GM HEI ignition - .035" - .060" with GM/MSD
ignition |
| Cam
End Play /w Cam Button |
.004" - .006"
|
|
 |
| Configuration |
Canted OHV V-8 Cast
Iron or Aluminum blocks and heads |
| Cylinders (Front to Back) |
Drivers side: 1-3-5-7 - Passenger
side: 2-4-6-8 |
| Firing
Order |
1-8-4-3-6-5-7-2 |
| Bore Spacing |
4.84" |
| Crankshaft |
5 main bearings, thrust
on #5 (rear) cast or forged crank |
| Crankshaft Diameter
|
Main Journal: (1-4) 2.7494"
(5) 2.7488" - Rod Journal: 2.20" |
| Connecting
Rods |
Forged steel, 6.135"
centers - Big end diameter, 2.345" - Rod bolt diameter, 3/8"
or 7 1/16 |
| Pistons |
Forged & cast aluminum, slipper
skirt |
| Lubrication |
Full pressure oiling |
| Bores |
3.935" - 4.500" |
| Strokes |
3.47" - 4.0" |
| Cubic Inch Displacement
|
366 - 396 - 402 - 427 - 454 - 510 |
| Compression
Ratios |
8.25:1 - 12.5:1 |
| Factory Induction |
2-bbl - 4-bbl - 3x2-bbl Throttle Body
Injection and Electronic Port Fuel Injection |
| Horse
Power |
215 HP to 465 HP (Factory
ratings) |
| Weight |
Approx. 500 lbs, all aluminum or 750
lbs, all cast iron, complete |
