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Engine Tech Page

2.2 Litre

 

Cronology of the 2.2

 

1981 This was the first year for the 2.2 liter engines. They developed 84 horsepower @ 4800 rpm and 111 ft-lbs of torque @ 2800 rpm. They gained popularity in the Plymouth TC3 Turismo and Dodge Charger 2.2, and were offered in just about every Chrysler 4-cylinder car. The first 2.2 featured a cast iron block with aluminum pistons, overhead camshaft and valves, and an aluminum cylinder head. In 1981, equipment included a Holley electronic feedback carburetor, water heated intake manifold, and a computer that monitored engine functions and controlled the air-fuel ratio.
1982 Slightly different intake manifold (shorter runner, larger plenum), still 84 hp. Underhead flat removed from exhaust valve. Cam centerline changed, with new sprockets. TRW exhaust valve seats. New "D" intake manifold as a running change.
1983 The first year for the A511 "G" Casting cylinder head, slightly more air-flow then the older head. .030" higher pistons for an increased compression ratio give it 94 hp. Also the first year for the Shelby engine in the Dodge Shelby Charger - the same as the regular engine except for slightly richer carb jets, a .030" milled engine block and slightly different engine computer, yielding107 hp. New exhaust manifold, flanges removed from sprockets (running change), low load valve springs, anti drainback valve added.
1984 The regular engine develops 96 hp @ 5200 rpm, the Shelby engine 110, now offered in the Shelby Omni GLH. First year for the TBI (throttle body injection) engine (99hp @ 5600rpm, the highest it would ever go, with 121 lb-ft of torque).

First year for the Turbo I engine - 142 hp, used in the Dodge Daytona Turbo. It featured multi-point fuel injection, a turbocharger with the wastegate set to limit boost to 7psi, and a compression ratio lowered to 8.5:1 to reduce detonation.

Other changes include hardened inserts added to rockers, higher load valve springs (both NA and turbo), stamped rockers, lightweight crankshaft, oil pump relief riased to 70 psi.

1985 The carbed engine makes 96 horsepower, TBI 99, the Shelby engine 110. Chrysler offers the Shelby engine in any Charger or Turismo with a 5 speed manual transmission. The Turbo I engine makes 146 hp and features a computer controlled wastegate set at 7psi with a new "transient boost system" that would allow 9psi for a small amount of time. First year for the Shelby Charger Turbo.

Other changes: bosses on block and head, oil management block (running change), intake valve surface improved, lightweight connecting rod (running change), high temp timing belt, 11 mm head bolts (running change), integral water box on bottom of intake manifold, better anti-drainback valve (running change), different oil pump rotor, oil pump relief back down to 60 psi, 8 bolt flywheel (late change).

1986 The first year for the A515 "fast burn" cylinder head and notched "fast burn" pistons, designed to decrease emissions. Carbed engine 96hp, TBI down to 97hp, Shelby 110hp, Turbo I 146hp.

The first year for the 2.5 liter engine, using the same cylinder head as the 2.2, single point throttle body injection, a taller block and balance shafts in the oil pan. 100hp @ 4800rpm - which would be the same through its end.

Other changes: low tension ring package, heater bypass moved to water pump, thicker head gasket (running change), new valve cover with curtain to prevent oil splashing, new valve spring on all engines, 2 mm longer valves (both intake and exhaust), exhaust guide materials changed, rocker pad surface finish improved, cam plug instead of lip seal in rear, better rod caps, crank drilled for N body (rear wheel drive), common dipstick and tube.

1987 Last year for the carbed engines, still 96hp. TBI stays at 97.

(this is where my information source on internal engine changes runs out).

1988 2.2 TBI goes down to 93 hp. Roller rocker camshafts are used in all 2.2 and 2.5 engines to replace the regular "slider" cams.
1993 Export 2.5 liter MPI engine produced with 106 hp.
1994 2.5 MPI drops to 103 hp. 2.2 TBI drops to 92 hp in its final year.
1995 The 2.2 and 2.5 finally drop from production. The Dodge Dakota, the last remaining vehicle to use the 2.5, switches to a 2.5 liter AMC engine producing 125 hp, in a final attempt to confuse Mopar fans.

Cam specs

1987 (Slider) Cam specs
                     2.2 Standard    2.2 Turbo       2.5 Standard

Intake Opens  (BTDC)          16              10              12
        Closes (ABDC)          48              50              52

Exhaust Opens  (BTDC)          52              50              48
         Closes (ABDC)          12              10              16

Valve Overlap                   28              20              28

Intake Duration                244             240             240*
Exhaust Duration               244             240             240*