| LT5
Engine Specifications |
| |
1990-1992 |
1993-1995 |
| GENERAL |
| SAE Net Power |
375 hp @ 6,000 rpm |
405 hp @ 5,800 rpm |
| SAE Net Torque |
370 ft lbs @ 4,800 rpm |
385 ft lbs @ 4,800 rpm |
| Bore/Stroke |
99 x 93 mm (3.90 in. x 3.66 in.) |
Carryover |
| Bore/Stroke Ratio |
1.07:1 |
Carryover |
| Compression Ratio |
11:1 |
Carryover |
| Displacement |
349 cu in, 5727 cc |
Carryover |
| Firing Order |
1,8,4,3,6,5,7,2 |
Carryover |
| Redline |
7200 rpm |
Carryover |
| ACCESSORY DRIVE |
| Type |
Single poly "V" belt |
Carryover |
| Supplier |
Dayco |
Carryover |
| ALTERNATOR |
| Idle Output |
50 amps |
Carryover |
| Max Output |
120 amps |
Carryover |
| Supplier |
Delco |
Carryover |
| CAMSHAFT DRIVE |
| Description |
Primary drive-silent chain- Secondary drive-duplex roller chain |
Carryover |
| Supplier |
Borg Warner |
Carryover |
| CAMSHAFTS |
| Material |
Alloy cast iron |
Carryover |
| Base Circle |
32.8 mm (1.291 in.) |
Carryover |
| Lobe Lift |
9.9 mm (0.39 in.) |
Carryover |
| Supplier |
GM Bay City |
GM Bay City (design changes, 1993-95) |
| CHAIN TENSIONERS |
| Description |
Hydraulic |
Carryover |
| Supplier |
INA |
Carryover |
| COOLING SYSTEM |
| Type |
Pressurized |
Carryover |
| CONNECTING ROD |
| Material |
Forged steel |
Carryover |
| Length (CTR distance) |
145.8 mm (5.74 in.) |
Carryover |
| Supplier |
Albon Engineering |
Albon Engineering (rods lightened, 1993-95) |
| CRANKCASE |
| Material |
Aluminum, with cast-in nodular cast iron bearing inserts |
Carryover |
| Description |
Ladder frame 2-bolt fastening per bearing panel |
Ladder frame 4-bolt fastening per bearing panel |
| CRANKSHAFT |
| Material |
Nitrided |
Carryover |
| Counterweights |
6 |
Carryover |
| Crankpin Journal |
53.33 mm (2.10 in.) |
Carryover |
| Crankpin Splay |
None |
Carryover |
| Thrust Position |
Bearing No. 3 |
Carryover |
| Main Journal Diameter |
70.00 mm (2.76 in.) |
Carryover |
| Supplier |
Shardlow |
Carryover |
| CYLINDER CASE |
| Material |
Aluminum casting |
Carryover |
| Descriptions |
Open deck 2-bolt fastening per bearing panel |
Open deck 4-bolt fastening per bearing panel |
| Bore Spacing |
111.76 mm (4.40 in.) |
Carryover |
| Deck Height |
229.24 mm (9.03 in.) |
Carryover |
| Supplier |
Dennison Foundry |
GM Bedford |
| CYLINDER HEAD |
| Material |
Aluminum |
Carryover |
| Description |
Cross flow, fast burn, pent roof combustion chamber |
Carryover |
| Combustion Chamber Volume |
40 cc |
Carryover |
| Gasket |
Composition (Goetze) |
Carryover |
| Supplier |
Birmal |
1995 1/2 model year-A.L. Dunn (design changes 1993-95) |
| CYLINDER LINER |
| Material |
Forged aluminum Nikasil coated |
Carryover |
| Supplier |
Mahle |
Carryover |
| EXHAUST VALVE |
| Material |
VMS-478 Seat:VMS-590 Chrome flashed |
VMS-478 Seat:VMS-637 Chrome flashed |
| Overall Length |
103.47 mm (4.07 in.) |
102.97 mm (4.05 in.) |
| Head Diameter |
35.2 mm (1.39 in.) |
Carryover |
| Angle Seat/Face |
44 degree/45 degree |
Carryover |
| Stem Diameter |
7.96 mm (0.314 in.) |
Carryover |
| Valve Angle |
12 degree |
Carryover |
| Valve Seat Diameter |
33 mm (1.30 in.) gauge diameter |
Carryover |
| Lift |
9.9 mm (0.39 in.) |
Carryover |
| Supplier |
TRW |
Carryover |
| FLYWHEEL |
| Material |
Cast iron |
Carryover |
| Description |
Dual mass |
Carryover |
| Supplier |
LUK |
Carryover |
| FUEL RAIL |
| Material |
Extruded aluminum-multech injectors |
Extruded aluminum-multech injectors (commonized injectors, 1993-95)
|
| Supplier |
AC Rochester |
Carryover |
| IGNITION COILS |
| Description |
Four-direct fire |
Carryover |
| Supplier |
Delco |
Carryover |
| INJECTOR HOUSINGS |
| Material |
Aluminum |
Carryover |
| Supplier |
Dennison |
Stahl (minor design change, 1993-95) |
| INLET VALVES |
| Material |
VMS-648 Flash chrome |
Carryover |
| Overall Length |
103.17 mm (4.06 in.) |
102.67 mm (4.04 in.) |
| Head Diameter |
39 mm (1.54 in.) |
Carryover |
| Angle Seat/Face |
44 degree/45 degree |
Carryover |
| Stem Diameter |
7.96 mm (0.314 in.) |
Carryover |
| Valve Angle |
10 degree |
Carryover |
| Valve Seat Diameter |
37.2 mm (1.46 in.) gauge diameter |
Carryover |
| Lift |
9.9 mm |
Carryover |
| Supplier |
TRW |
Carryover |
| LUBRICATION SYSTEM |
| Type |
Full flow. Temp regulated |
Carryover |
| Main and Con Rod Bearings |
Direct feed through center crank via cross drillings |
Carryover |
| Cam Bearings |
Forced through center cam |
Carryover |
| Piston Pins |
Splash |
Carryover |
| Cylinder Walls |
Splash |
Carryover |
| Total Capacity |
12 1/2 qts |
Carryover |
| MAIN BEARINGS |
| Material |
Lead-indium overlay |
Carryover |
| Description |
Cast leaded bronze steel-backed |
Carryover |
| Supplier |
Vandervell |
Carryover |
| OIL PAN |
| Material |
Aluminum |
Carryover |
| Capacity |
9.6 qts. |
Carryover |
| Supplier |
Stahl Specialty |
Stahl Specialty (design changed, 1993-95 model years) |
| OIL PUMP |
| Type |
Duo-centric-crankshaft driven |
Carryover |
| Pressure |
50-60 psi |
Carryover |
| Temp Regulation |
Thermostat-Open-95 degree C Fully open-130 degree C |
Carryover |
| Capacity |
Idle-1.6 gpm 7,000 rpm-9.1 gpm |
Carryover |
| Supplier |
Presta |
SHW (minor design change, 1993-95 model years) |
| PISTON |
| Material |
Aluminum-cast |
Carryover |
| Description |
Expansion control-spherical bowl |
Carryover |
| Compression Height |
36.5 mm (1.44 in.) |
Carryover |
| Supplier |
Mahle |
Mahle (piston strengthened, 1993-95) |
| PISTON PIN |
| Material |
Steel |
Carryover |
| Description |
Free Floating |
Carryover |
| Supplier |
Mahle |
Mahle (design revised, 1993-95) |
| PISTON RINGS |
| Top Compression |
Barrel-cast iron |
Plated-cast iron |
| Middle Compression |
Taper-cast iron |
Lapped-cast iron |
| Oil Control |
Cast iron-internal spring |
Lapped-cast iron-internal spring |
| Supplier |
Mahle (Goetze) |
Mahle (Goetze) (design revised, 1993-95) |
| PLENUM |
| Material |
Aluminum |
Carryover |
| Supplier |
Stahl Specialty |
Stahl Specialty (design changed, 1993-95 model years) |
| POWER STEERING PUMP |
| Type |
Engine mounted-reservoir |
Carryover |
| Supplier |
Saginaw |
Carryover |
| RADIATOR |
| Core Thickness |
1.34 in. |
Carryover |
| Frontal Area |
405 sq. in. |
Carryover |
| Radiator Cap |
17 psi. |
Carryover |
| Thermostat Open |
180 degree F |
Carryover |
| Fully Open |
195 degree - 200 degree F |
Carryover |
| STARTER MOTOR |
| Type |
Gear reduction |
Carryover |
| Output |
1.4 Kw |
Carryover |
| Supplier |
Delco |
Carryover |
| VALVE LIFTERS |
| Material |
Alloy cast iron |
Carryover |
| Type |
Hydraulic |
Carryover |
| Supplier |
AC Rochester |
Carryover |
| VALVE SPRINGS |
| Type |
Inner & outer opposed winding |
Carryover |
| Load-Closed |
160-313 N (36-70 lbs.) |
Carryover |
| Load-Open |
350-696 N (78-157 lbs.) |
Carryover |
| Supplier |
Tempered Spring |
Carryover |
| VALVE TRAIN |
| Description |
Direct acting Double overhead cam |
Carryover |
| WATER PUMP |
| Type |
Centifugal |
Carryover |
| Capacity |
12 gpm @ idle 85 gpm @ 7,000 rpm |
Carryover |
| Supplier |
Ace (Casting) |
Carryover |
