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One of the key upgrades were the 6x4 heads. The standard head seen on an L78 400 Pontiac was the low compression 6x8 head, while the 6x4 head seen on the W72 had hardened valve seats for a higher RPM operating range, improved air flow, and higher compression. These heads can be distinguished from 6x8 heads through a small stamped "4" on the top ...
From 1952 to 1954 two compression ratios were specified, 6.8:1 with synchromesh (manual) transmission, and 7.7:1 with Hydramatic automatic transmission. [4] The engine had a remarkably low idle speed of 450 rpm with standard transmission and 375 rpm (while in drive) for the automatic; [ 5 ] a modern engine is usually tuned to a minimum 600-700 rpm.
In 1929, the "split head" Pontiac six was increased in displacement to 200 cu in (3.3 L). The horsepower rating increased to 60 hp (45 kW; 61 PS) @ 3000 rpm. Compression was increased slightly to 4.9:1. [2] The "split-head" six was discontinued by Pontiac at the end of the 1932 model year.
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 ...
2.5L 60° V6 (LB8) The LB8 is General Motors ' base V6 in China. It is a derivative of the LG8 with the same 89 mm (3.5 in) bore and a shorter 66.7 mm (2.6 in) stroke for 2.5 L (2,490 cc). It remains an iron block with pushrods and an aluminum two-valve head. Power is 145 hp (108 kW) and 155 lb⋅ft (210 N⋅m).
Pontiac Catalina. The Pontiac Catalina is a full-size automobile produced by Pontiac from 1950 to 1981. Initially, the name was a trim line on hardtop body styles, first appearing in the 1950 Chieftain Eight and DeLuxe Eight lines. In 1959, it became a separate model as the "entry-level" full-size Pontiac. [ 1]
Predecessor. 301.6 cu in (4.9 L) Pontiac 301. The Pontiac 301 Turbo is an engine that Pontiac produced for the 1980 and 1981 Trans Am. It was a V8 engine with a displacement of 301 cubic inch which produced an officially factory rated 210 hp (157 kW) and 345 lb⋅ft (468 N⋅m) of torque in 1980. In 1981 it underwent some changes and offered a ...
The Pontiac LeMans / ləˈmɑːnz / is a model name applied to automobiles marketed by Pontiac. The name came from the French city of Le Mans, the site of the 24 Hours of Le Mans, the world's oldest active sports car endurance race that began in 1923. Originally a trim upgrade package based on the Tempest, the LeMans became a separate model in ...