1982-1993 5.0. H.O. history highlights.
3/19/13, 08:32 AM
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1982-1993 5.0. H.O. history highlights.
Focus will be on the 5.0. H.O. motor. The 1982 H.O. 302 is a thin –wall casted block with a 4.00 X 3.00 bore and stroke ( ’79 used the non-thin walled heavy cast carry over block). In the late 1982 production cycle a revision to the blockwas made to change it to a one piece rear main seal , this also required aredesign of the crankshaft. Two types ofblocks have been used in the fox mustang non-roller short casting and rollertall casting block. The crank shaft wascast iron and the connecting rod where forged steel through 1993 in the fox mustang 5.0. .
Year by year 5.0. H.O. highlights :
1982
The 5.0. H.O. was introduced in the fox mustang
Imbalance changed to 50oz. and a 34oz damper
Cast aluminum pistons
351W flat tappet camshaft, duration 260* intake, 278*exhaust. Lift .416” intake & .444 exhaust
Double roller timing chain
Carry over “D9AE” heads with larger valves and upgraded valve springs
Aluminum dual plane intake manifold
369 cfm motorcraft 2 barrel carb
Dual snorker 15” high dome air cleaner
Cast iron headers
1983
600 cfm motorcraft/holley 4 barrel carb
Dual snorker 17” high dome air cleaner
Engine carried over
1984
Engine carried over
Redesigned automatic choke
Central fuel injection added for automatic transmission equipped H.O.’s
1985
Revised block with retainer bosses for roller tappets
Hydraulic roller camshaft introduced. 266* duration and .444”lift
Revised cylinder heads to allow removal of roller tappets w/o removing heads. New part # E5AE
Distributor drive gear changed to work with new steelcamshaft
Forged aluminum pistons make debut. 2 valve reliefs cut intothe tops and compression stayed 8.4:1
Carry over motorcraft/holley 4 barrel carb with improvedsecondary metering
Water pump impeller blades redsigned to improve cooling
Stainless steel tubular headers make debut on fox mustang
1986
Block revision. The block now has extra thick decks &cylinder walls. The block was cast in semi-siamese design. The upper bore wallsare fully coolant jacketed and the lower bore is cast with solid iron joiningthe cylinders.
Flat top forged aluminum pistons increased compression to9.2:1
New high swirl cylinder heads with masked valves where used. New part # E6AE
Camshaft carried over
SEFI ( sequential fuel injection) introduced on the fox. Speed density controlled sytem with 58mm TB and 19lb/hr injectors
New aluminum low drag water pump
1987
New truck cast cylinder heads with with revised combustionchamber. New part # E7TE
Forged aluminum domed pistons with 4 valve reliefs. Compression now 9.1:1
1988
Mass air on California models. 55mm mass air meter nowmeasures actual air flowing into the engine
49 state models remain carry over
Minor cam revision. Change in lobe contour makes small change to valve events. Cost about3hp
1989
Mass Air on all models
1990
carry over
1991
Cam revision to fix hole and threads in in snout of cam.
Carry over
1992
Carry over
Late ’92 production got cast hypereutectic pistons ( from searching for a firm answer, yes some owners of '92 have these pistons, no doubt has ford was getting ready for '93 production around 10/92. Research has also found that majority have found that forged piston motors had the gray oil pan and hypers had the black oil pan found on '93 and later 302's )
1993
Cast hypereutectic pistons
High torque mini starter
Carry over
1993 GT40
Cast hypereutectic pistons
GT40 cylinder heads with larger ports, valves and performance springs
1.7 roller rockers
High lift short duration camshaft. .282” lift 270* duration
GT40 cast aluminum upper/lower intake
65mm TB
70mm MAF
24lb/hr injectors
Under driven water pump & crank pulleys
Special calibrated ECC
.
Year by year 5.0. H.O. highlights :
1982
The 5.0. H.O. was introduced in the fox mustang
Imbalance changed to 50oz. and a 34oz damper
Cast aluminum pistons
351W flat tappet camshaft, duration 260* intake, 278*exhaust. Lift .416” intake & .444 exhaust
Double roller timing chain
Carry over “D9AE” heads with larger valves and upgraded valve springs
Aluminum dual plane intake manifold
369 cfm motorcraft 2 barrel carb
Dual snorker 15” high dome air cleaner
Cast iron headers
1983
600 cfm motorcraft/holley 4 barrel carb
Dual snorker 17” high dome air cleaner
Engine carried over
1984
Engine carried over
Redesigned automatic choke
Central fuel injection added for automatic transmission equipped H.O.’s
1985
Revised block with retainer bosses for roller tappets
Hydraulic roller camshaft introduced. 266* duration and .444”lift
Revised cylinder heads to allow removal of roller tappets w/o removing heads. New part # E5AE
Distributor drive gear changed to work with new steelcamshaft
Forged aluminum pistons make debut. 2 valve reliefs cut intothe tops and compression stayed 8.4:1
Carry over motorcraft/holley 4 barrel carb with improvedsecondary metering
Water pump impeller blades redsigned to improve cooling
Stainless steel tubular headers make debut on fox mustang
1986
Block revision. The block now has extra thick decks &cylinder walls. The block was cast in semi-siamese design. The upper bore wallsare fully coolant jacketed and the lower bore is cast with solid iron joiningthe cylinders.
Flat top forged aluminum pistons increased compression to9.2:1
New high swirl cylinder heads with masked valves where used. New part # E6AE
Camshaft carried over
SEFI ( sequential fuel injection) introduced on the fox. Speed density controlled sytem with 58mm TB and 19lb/hr injectors
New aluminum low drag water pump
1987
New truck cast cylinder heads with with revised combustionchamber. New part # E7TE
Forged aluminum domed pistons with 4 valve reliefs. Compression now 9.1:1
1988
Mass air on California models. 55mm mass air meter nowmeasures actual air flowing into the engine
49 state models remain carry over
Minor cam revision. Change in lobe contour makes small change to valve events. Cost about3hp
1989
Mass Air on all models
1990
carry over
1991
Cam revision to fix hole and threads in in snout of cam.
Carry over
1992
Carry over
Late ’92 production got cast hypereutectic pistons ( from searching for a firm answer, yes some owners of '92 have these pistons, no doubt has ford was getting ready for '93 production around 10/92. Research has also found that majority have found that forged piston motors had the gray oil pan and hypers had the black oil pan found on '93 and later 302's )
1993
Cast hypereutectic pistons
High torque mini starter
Carry over
1993 GT40
Cast hypereutectic pistons
GT40 cylinder heads with larger ports, valves and performance springs
1.7 roller rockers
High lift short duration camshaft. .282” lift 270* duration
GT40 cast aluminum upper/lower intake
65mm TB
70mm MAF
24lb/hr injectors
Under driven water pump & crank pulleys
Special calibrated ECC
.
Last edited by skunk21; 3/22/13 at 04:03 PM.
3/22/13, 03:42 PM
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12/30/13, 03:56 PM
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Source:http://www.fiveohinfo.com
Id stop there or get an aftermarket block or a 351. You can push a 351 to 500 hp.
9/27/23, 09:40 AM
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