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The Pontiac Trophy 4 engine (also called the Indianapolis 4, [1] or Indy 4) is a 194.5 cu in (3.2 L) inline four-cylinder engine [2] produced by the Pontiac Motor Division of General Motors for model years 1961 through 1963. [3]
The Iron Duke engine (also called 151, 2500, Pontiac 2.5, and Tech IV) is a 151 cu in (2.5 L) straight-4 piston engine built by the Pontiac Motor Division of General Motors from 1977 until 1993. Originally developed as Pontiac's new economy car engine, it was used in a wide variety of vehicles across GM's lineup in the 1980s as well as supplied ...
The SD4 (Super Duty 4-cylinder) was the last in a line of high-performance Pontiac engines. A 2.7 L (165 cu in) 232 hp (173 kW) SD4 engine powered the 1984 Indy Fiero Pace Car to over 138 mph (222 km/h) during the race.
The engine was a 195 cubic inch (3.2 L) straight-4 [7] marketed as the "Trophy 4," derived from the right cylinder bank of Pontiac's 389 cubic inch "Trophy 8" V8 engine. [8] The Tempest featured a drivetrain with a rear-mounted transaxle [ 9 ] that was coupled to a torque shaft arcing in a 3 in (76 mm) downward bow within a curved, longitudinal ...
This was so named because it began with Chevrolet's V8 engines. Chevrolet big-block V8s; Chevrolet small-block V8s; GM Vortec 4300 90° V6; GM Iron Duke RWD inline 4 (early RWD Variants, later versions may use a FWD pattern, and have two possible starter locations) Jeep with GM Iron Duke inline 4 2.5L/151 in³ (1980-1983).
The engine was the pinnacle of Pontiac engine development and was a strong performer that included a few race-specific features, such as provisions for dry-sump oiling. The only non-traditional Pontiac V8 engines were the 301 cu in (4.9 L) and the 265 cu in (4.3 L).
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