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It is an all-iron engine (block and heads) with two valves per cylinder. It retained the 4.25 in (107.95 mm) bore diameter of the old 7.0 L (427 cu in) and 7.4 L (454 cu in) big-blocks, but the stroke was increased to 4.37 in (111.00 mm) for a total displacement of 495.95 cu in (8.1 L).
The bore diameter was reduced to 74mm (from 81mm on the full-size Kent), and was standard across both the 957 and 1117 versions; the extra capacity was achieved by varying the stroke. In addition to these changes, the Valencia featured a new transmission flange to suit the BC4/5 transaxle and the cylinder head was redesigned using flat-top ...
An overhead valve engine, abbreviated (OHV) and sometimes called a pushrod engine, is a piston engine whose valves are located in the cylinder head above the combustion chamber. This contrasts with flathead (or "sidevalve") engines , where the valves were located below the combustion chamber in the engine block .
However, in 1991, USAC quietly lifted the requirement, and purpose-built pushrod engines were permitted to be designed for racing at the onset. Attempting to create an equivalency formula, [14] both pushrod engine formats were allowed increased displacement (209.3 cid vs. 161.7), [13] and increased turbocharger boost (55 inHG vs. 45 inHG) [13]
The Chevrolet Inline-4 engine was one of Chevrolet's first automobile engines, designed by Arthur Mason and introduced in 1913. Chevrolet founder Billy Durant, who previously had owned Buick which had pioneered the overhead valve engine, used the same basic engine design for Chevrolet: exposed pushrods and rocker arms which actuated valves in the detachable crossflow cylinder head.
The bore spacing of 4 + 3 ⁄ 4 in (120.7 mm) was unlike any American V8 engine, with the sole exceptions of Buick's big block V-8 and AMC American Motor's V-8 line which share the same identical 4.750 bore centers, and the firing order was 1-5-4-8-6-3-7-2 something uncommon in any period American OHV V8.
New brakes were fitted to the model, full width hubs instead of the previous half width items. The front brake was 8" and the rear 7". Both were operated by cables. [19] The 357 race camshaft was fitted in 1960 [10] and the clutch was improved. [35] A larger 1 5/32" bore Monoblock carburettor fitted in 1962. [12]
For the 2008 Dodge Viper, the engine's output was increased to 600 bhp (608 PS; 447 kW) at 6100 rpm and 560 lb⋅ft (759 N⋅m) at 5000 rpm of torque via a slight displacement increase to 8,382 cc (8.4 L; 511.5 cu in) and the use of variable valve timing, among the first utilized in a pushrod engine. The bore was now 4.055 in (103.0 mm), the ...
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