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The firing order has been changed from that shared by all previous Modular V8s (1-3-7-2-6-5-4-8) to that of the Ford Flathead V8 (1-5-4-8-6-3-7-2). [17] Compression ratio is 11.0:1, and despite having port fuel injection (as opposed to direct injection) the engine can still be run on 87 octane gasoline.
A high-performance 327 cu in (5.4 L) variant followed, turning out as much as 375 hp (280 kW) (SAE gross power, not SAE net power or the current SAE certified power values) and raising horsepower per cubic inch to 1.15 hp (0.86 kW). From 1954 to 1974, the small-block engine was known as the "Turbo-Fire" or "High Torque" V8.
The 351W had larger main bearing caps, thicker and longer connecting rods, and a distinct firing order (1-3-7-2-6-5-4-8 versus the usual 1-5-4-2-6-3-7-8, a means to move the unacceptable "noise" of the consecutively-firing adjacent front cylinders to the sturdier rear part of the engine block all while reducing excessive main bearing load ...
The ZZ632's iron block shares a mold with Chevrolet Performance's ZZ572 crate engines, but the castings are machined to accommodate the huge 632 cubic-inch displacement. The bore grows by 0.040 in (1.0 mm), compared to the 572-cubic-inch V8s, with most of the displacement gain coming from a stroke that is 0.375 in (9.5 mm) longer.
1986–1987 Ford-Cosworth GBA engine—120° V6, 1.5 L (Formula One engine) 1986–2007 Vulcan V6 —60° pushrod V6 3.0 L, originally designed for the Taurus 1989–1995 SHO V6 3.0/3.2 L DOHC V6
It was a popular high-performance engine; [18] although not as powerful as the 427 and 428 models, it provided good performance, particularly in lighter-weight vehicles. The 390 cu in (6.4 L) 2v is rated at 265 bhp (197.6 kW) at 4,100 rpm, while the 4v version was rated at 320 bhp (238.6 kW) at 4,100 rpm in certain applications.