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In 1967 the 421 was enlarged to 426.61 cu in (7.0 L) by increasing its bore to 4.12 in (104.6 mm). Both Chevy and Ford had 427 cu in performance engines, so Pontiac simply referred to its 427 as a 428 to one-up them. It retained the 421's 4 in (101.6 mm) stroke and 3 + 1 ⁄ 4 in (82.6 mm) main journal.
Heads used on the high performance 409 and 427 engines had larger ports and valves than those used on the 348 and the base 409 passenger car and truck engines, but externally were identical to the standard units – but for the location of the engine oil dipstick, on the driver's side on the 348 and the passenger's on the 409/427.
As Chevrolets under the skin, Canadian Pontiacs including the Parisienne used the same engines and transmissions as full-size Chevys, including the 230 and 250 cubic inch 6 cylinder and 283, 307, 327, 350, 396, 400, 409, 427 and 454 cu inch V8s. These engines were mated to the same transmissions as Chevrolet, including 3 and 4 speed manual and ...
Introduced in 1963 on Pontiac's 389 and 421 cu in (6.4 and 6.9 L) drag racing engines, General Motors fitted it to the 1967 Z/28 before they used it on the L88 427 cu in (7.0 L) Corvette. It eliminated the production breaker-point ignition allowing greater spark energy and more stable ignition timing at all engine speeds including idle.
Do not confuse with later AMC 2.5 L engine that uses GM small corporate pattern . Chevrolet Turbo-Thrift engine (post-1962) Chevrolet 153 Inline 4 (Chevy II, pre-Iron-Duke - includes the Vortec 3000/181 industrial/marine crate motor) Detroit Diesel V8 6.2L and 6.5L; Duramax V8; Generation III V8s with modifications. These modifications include ...
For the 1963 season NASCAR engines were restricted to using a maximum displacement of 427 cu in (7.0 L), and using only two valves per cylinder. Then, in 1964 the new Chrysler 426 Hemi engine so dominated the series in a Plymouth Belvedere "Sport Fury" , the homologation rules were changed so that 1,000 of any engine and car had to be sold to ...
LS7 can also refer to a 454 over-the-counter 460+ hp high compression engine Chevrolet Big-Block engine of the 1970s 7.0L LS7 engine in a 2006 Chevrolet Corvette Z06. The LS7 is a 7,011 cc (7.0 L; 427.8 cu in) engine, based on the Gen IV architecture.
1963-engines were available in 415 and 425 horsepower versions. 1964 was the final year of the Max Wedge option. The engine for the third year was named the "Stage III." Max Wedge cars equipped with four-speed transmissions were only produced in the final year, as prior to that point Chrysler did not have a manual transmission that could handle ...
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