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The Offenhauser engine, colloquially known as Offy, was developed by Fred Offenhauser and his employer Harry Arminius Miller 1 Originally, it was sold as a marine engine in 1930, a four-cylinder 151-inch cubed 2 47 l engine Miller installed in a car race set a new international land speed record 144 895 mph 233,186 km h Miller developed this engine cams double head, four-cylinder 220 cu four valves per cylinder 3 6L racing engine variants of this design would be used in midgets and sprints in the 1960s, 2 with a choice of carburetor or fuel injection Hilborn 3 When both Miller and the company to which he had sold most of the equipment and the rights went bankrupt in 1933, Offenhauser opened a store a block away and bought the rights to the motors, special tooling and drawings to the auction from bankruptcy, e Does he and other former employees Miller resumed production Themselves and former employee Miller, designer Leo Goossen Miller developed the engines in the engine Offenhauser s Then, in 1946, designs and engine name were sold Louis Meyer and Dale Drake Meyer was purchased by Drake, his wife Eve and their son John in 1965. From then until the son of John Drake sold the shop to Stewart Van Dyne, Drake designed and refined family the engine until its final days of racing, he was under Drake Meyer and the engine dominated the Indy 500 and midget in the United States 4.
One of the keys Offenhauser engine success and popularity is its power A 251 92 4128 29 cm cubic inch stroke DOHC four-cylinder engine with a Offy Report 15 1 compression and 4-28125-en-inch 4375 108 744 mm 111 bore of 125 mm and the race could produce 420 hp 310 kW at 6600 rpm January 77 hp per cubic inch 81 kW l Other product engine variants even higher results of 3 hp per cubic inch 137 kW l another reason for engine success was reliability; its monobloc building meant that it was not vulnerable to the head of the stud or roller seal problems, and has the higher pressure cylinders.
From 1934, in the 1970s, the Offenhauser engine dominated the American wheel racing to win the Indianapolis 500 27 times this time, the company had already been sold, just after World War II, Meyer and Drake, who continued to build engines of 1950 to 1960, the Offenhauser powered cars won the Indy 500 and reaches the three places on the podium, winning the pole position in 10 of the 11 years in 1959 Lime rock Park held a famous race Free Formula, where Rodger Ward shocked the expensive sports car and exotic quota beating on the course of the road in a midget car powered Offenhauser which was generally considered competitive on oval tracks only.
When Ford came on the scene in 1963, the Offy began to lose its dominion over Indy car racing, though he remained a competitive winner through the mid-1970s, even with the advent of turbocharging more outlets 1000 bhp 750 kilowatts could be achieved, around 44 using 3 psi 3 05 supercharge pressure bar final 2 the 65 liter four cylindar Offy, limited to 24 6 psi 1 70 bar amplification product 770 c 570 kW at 9000 rpm Offy final victory came at Trenton in 1978, Gordon Johncock Wildcat last a Offy powered car was raced in 1982 for Domino's Pizza Pocono Pocono 500 in an Eagle chassis driven by Jim McElreath well two chassis with Vollstedt Offenhauser engines failed to qualify for the Indianapolis 500 in 1983.
The Offenhauser shop started making the machine work for Lockheed in 1940, such as arms buildup for the anticipated war began last prewar engine was delivered July 17, 1941 After the attack on Pear Harbor the factory has worked overtime on hydraulic systems, Fred Offenhauser get money and fatigue to retire in 1944, Leo Goossen finally became a full-time employee Offenhauser 4.
Offenhauser engine blocks produced in several sizes These blocks could be bored or sleeves to vary the cylinder bore and can be used with crankshafts of various shots, causing a wide variety of engine displacements and Meyer-Drake Offenhauser, years later often blocks, pistons, rods and crankshafts to specific customer requests However, some motor sizes were common and could be considered standard motors Offenhauser 4.
97 cu in 1 L 59 - to meet the travel rule in many midget series.
220 cu in 3 6 L - sets moving in subsequent sprint cars AAA USAC.
270 cu in 4 4 L - sets the displacement of the Indianapolis 500 according to the rules of AAA.
255 cu in 4 18 L - Indianapolis during fuel economy rules 1930.
252 cu in April 13 L - move rule Indianapolis under USAC rules.
168 cu in 2 75 L - move rule for supercharged engines in Indianapolis and 1968.
159 cu in 2 61 L - move rule for supercharged engines in Indianapolis 1969 and later.
Two views of a racing engine Offenhauser midget - polished for display.
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