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Cylinder head porting refers to the process of modifying the intake and exhaust ports of an internal combustion engine to improve their air flow. Cylinder heads, as manufactured, are usually suboptimal for racing applications due to being designed for maximum durability. Ports can be modified for maximum power, minimum fuel consumption, or a ...
The 322 Fireball V8 in a 1956 Buick Century. Buick's first generation V8 was offered from 1953 through 1956; it replaced the Buick straight-eight.While officially called the "Fireball V8" [1] by Buick, it became known by enthusiasts as the "Nailhead" for the unusual vertical alignment of its small-sized valves (Originally it was known to hot-rodders as the "nail valve", because the engine's ...
Buick Nailhead V8 The Buick straight-8 engine ( Fireball 8 ) was a straight-eight cylinder automobile engine produced from 1931 to 1953 by the Buick division of General Motors . It replaced the Buick Straight-6 engine across the board in all models on its debut.
The early Repco engines produced up to 300 bhp (220 kW), and featured new SOHC cylinder heads and iron cylinder liners. The 1967 and later versions of the Repco engine had proprietary engine blocks. In the mid-1980s, hot rodders discovered the 215 could be stretched to as much as 305 cu in (5 L), using the Buick 300 crankshaft, new cylinder ...
The cylinder heads on the 400 CID version had an intake port volume of 290 cc (17.70 cu in), nearly twice the size of a typical standard D-port Pontiac head - and flowed in the area of 315 cu ft/min (8.9 m 3 /min) at 0.8 in (20 mm) valve lift; in the realm of the NASCAR-dominating Chrysler 426 Hemi. [citation needed]
Schnuerle porting [1] [2] is a system to improve efficiency of a valveless two-stroke engine by giving better scavenging. The intake and exhaust ports cut in the cylinder wall are shaped to give a more efficient transfer of intake and exhaust gases.
This brings with it the problem that the exhaust ports have a tighter turn radius. This problem is somewhat offset by the larger port. Another popular solution, as used in the BMC A-Series and Holden 6-cylinder engines is the siamesed port. In this configuration one large port feeds 2 adjacent cylinders. The gain in area comes from effectively ...
The Nash Ambassador Six retained the Nash 252.6 cu in (4.1 L) OHV six for 1955 and 1956, V8 only for 1957. The Nash OHV six, dating back to 1934, was a totally different design than the Rambler 195.6. Hudson six-cylinder cars retained the Hudson L-head six, 308 cu in (5.0 L) in the Hornet and 202 cu in (3.3 L) in the Wasp.