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332: 120: 32: 340: 73: 563: 555: 396:. When both Miller and the company to whom he had sold much of the equipment and rights went bankrupt in 1933, Offenhauser opened a shop a block away and bought rights to engines, special tooling and drawings at the bankruptcy auction, and he and other former Miller employees took over production. They and former Miller employee, draftsman 525:
of only 168 cu in (2,750 cc). Outputs over 1,000 bhp (750 kW) could be attained, using around 44.3 psi (3.05 bar) of boost pressure. The final 2.65-litre four-cylinder Offy, restricted to 24.6 psi (1.70 bar) boost, produced 770 bhp (570 kW) at
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and Dale Drake. It was under Meyer and Drake that the engine dominated the Indianapolis 500 and midget racing in the United States. In 1965, Meyer was bought out by Drake, his wife Eve and their son John. From then until Drake's son John sold the shop to Stewart Van Dyne, the Drake family designed
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Offenhauser produced engine blocks in several sizes. These blocks could be bored out or sleeved to vary the cylinder bore, and could be used with crankshafts of various strokes, resulting in a wide variety of engine displacements. Offenhauser (and Meyer-Drake, in later years) frequently made
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could produce 420 hp (310 kW) at 6,600 rpm (1.77 hp per cubic inch, 81 kW/L) making it remarkably power-dense. Other variants of the engine produced even higher outputs of 3 hp per cubic inch (137 kW/L), unparalleled for their size and capacity in power-to
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only. On the strength of this performance, the car was entered in the Formula 1 1959 US Grand Prix at Sebring, where it was totally uncompetitive, setting a qualifying time of 3:43.8 compared to the pole time of 3 minutes dead and being the slowest Formula 1 starter at 3:33.4.
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of 144.895 mph (233.186 km/h). Miller developed this engine into a twin overhead cam, four-cylinder, four-valve-per-cylinder 220 cu in (3.6 L) racing engine. Variations of this design were used in
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the Offy began to lose its domination over Indy car racing, although it remained a competitive winner on the circuit including at the 500 through the mid-1970s even with the advent of
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blocks, pistons, rods, and crankshafts to specific customer requests. However, certain engine sizes were common, and could be considered the "standard" Offenhauser engines:
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in 1940, as the arms build-up for anticipated war began. The last prewar engine was shipped on July 17, 1941, and the plant began producing hydraulic systems after the
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27 times. From 1950 through 1960, Offenhauser-powered cars won the Indianapolis 500 and achieved all three podium positions, winning the
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In the 11 World Championship years, the Meyer-Drake Offenhauser engine partnered for at least one race with the following 35
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One of the keys to the Offenhauser engine's success and popularity was its power. A 251.92 cubic inch (4,128.29 cm³)
372:. In 1930 a four-cylinder 151 cu in (2.47 L) Miller engine installed in a race car set a new international 184: 1221: 156: 1801: 466:. Leo Goossen finally became a full-time Offenhauser employee in 1944, and Fred Offenhauser sold the company in 1946. 1771: 1744: 221: 203: 59: 1787: 1030: 163: 904: 579: 994: 964: 894: 719: 607: 597:
159 cu in (2.61 L) - displacement rule for turbocharged engines at Indianapolis (1969 and later)
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168 cu in (2.75 L) - displacement rule for turbocharged engines at Indianapolis (to 1968)
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cubic-inch/cylinder-count ratio. Another reason for the engine's success was its reliability. Its
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255 cu in (4.18 L) - for Indianapolis (during the 1930s fuel consumption rules)
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270 cu in (4.4 L) - displacement rule for the Indianapolis 500 under AAA rules
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252 cu in (4.13 L) - displacement rule for Indianapolis under USAC rules
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97 cu in (1.59 L) - to meet the displacement rule in many midget series
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the win that year. The engine made 750 hp (560 kW) @ 9,500 rpm, from a
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This article is about the racing engine. For the speed parts company, see
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From 1934 through the 1970s, the Offenhauser engine dominated American
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9,000 rpm. The Offy's final victory came at Trenton in 1978, in
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and a 4.28125-by-4.375-inch (108.744 mm × 111.125 mm)
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with much increased competition and sanctioning body rule changes,
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Offenhauser: The Legendary Racing Engine and the Men Who Built It
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The Offenhauser engine, familiarly known as the "Offy", was an
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In 1946, the name Offenhauser and engine designs were sold to
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The "Offy" engine was derived from this Miller marine engine
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From 1950 to 1960, the Indianapolis 500 was a round of the
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naturally-aspirated four-cylinder racing Offy with a 15:1
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for more than 50 years and is still popular among vintage
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220 cu in (3.6 L) - displacement rule in
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Unsourced material may be challenged and removed. 558:An Offenhauser midget engine, polished for display 458:The Offenhauser shop began to do machine work for 436:or cylinder stud problems, and allowed for higher 408:and refined the engine until its final race days. 513:version of the engine was used by Offenhauser in 1820: 1216:Complete Formula One World Championship results 493:, which was normally considered competitive on 549: 1220:(excluding the 1950-1960 Indianapolis 500) ( 602:World Championship Indianapolis 500 summary 60:Learn how and when to remove these messages 566:Offenhauser midget car engine - front view 242: 1839:Engine manufacturers of the United States 222:Learn how and when to remove this message 204:Learn how and when to remove this message 1788:"The Immortal Offenhauser Racing Engine" 1661:National Midget Auto Racing Hall of Fame 1024:Indianapolis Motor Speedway race results 561: 553: 338: 330: 97:of all important aspects of the article. 501:When Ford came onto the scene in 1963, 1821: 1649: 93:Please consider expanding the lead to 1733:White, Gordon Eliot (June 15, 2004). 1732: 343:An Offenhauser sprint "midget" racer 142:adding citations to reliable sources 113: 66: 25: 1759: 13: 485:contingent by beating them on the 14: 1850: 481:shocked the expensive and exotic 385:into the 1960s, with a choice of 41:This article has multiple issues. 1829:Formula One engine manufacturers 118: 71: 30: 1794: 1780: 432:construction made it immune to 368:. Originally, it was sold as a 311:design that dominated American 129:needs additional citations for 85:may be too short to adequately 49:or discuss these issues on the 1753: 1739:. MBI Publishing Company LLC. 1726: 1690: 1678: 1627: 1606: 1584: 95:provide an accessible overview 1: 1578: 21:Offenhauser Sales Corporation 1766:. MotorBooks International. 7: 608:World Drivers' Championship 10: 1857: 1026:for a more complete list. 550:Common Offenhauser engines 489:in an Offenhauser powered 358:internal combustion engine 326: 237:Offenhauser Racing Engines 18: 1776:– via Google Books. 1749:– via Google Books. 1478: 1473: 1412: 1407: 1402: 1399:Reventlow Automobiles Inc 1397: 1392: 1359: 1356: 1304: 1299: 1293: 1290: 1285: 536:Domino's Pizza Pocono 500 298:Offenhauser Racing Engine 281: 271: 263: 253: 241: 582:(later USAC) sprint cars 1716:by Gordon Eliot White, 455:in 10 of the 11 years. 1663:. 1999. Archived from 567: 559: 344: 336: 565: 557: 366:Harry Arminius Miller 342: 334: 138:improve this article 16:Racing engine design 1763:American Horsepower 464:Pearl Harbor attack 276:Fred H. Offenhauser 238: 1657:"Fred Offenhauser" 1637:. 24 December 2012 1594:. 27 November 2021 1291:Leader Cards Inc. 568: 560: 542:chassis driven by 509:. A more powerful 438:cylinder pressures 345: 337: 234: 1722:978-1-62654-041-5 1576: 1575: 1020: 1019: 825:Tony Bettenhausen 445:open-wheel racing 417:compression ratio 374:land speed record 313:open wheel racing 294: 293: 232: 231: 224: 214: 213: 206: 188: 112: 111: 64: 1846: 1834:Indianapolis 500 1814: 1813: 1811: 1809: 1798: 1792: 1791: 1790:. 16 March 2017. 1784: 1778: 1777: 1757: 1751: 1750: 1730: 1724: 1711: 1700: 1694: 1688: 1687:, 9/84, pp.82-3. 1682: 1676: 1675: 1673: 1672: 1653: 1647: 1646: 1644: 1642: 1631: 1625: 1624: 1622: 1620: 1610: 1604: 1603: 1601: 1599: 1588: 1417: 1227: 1226: 613: 612: 534:in 1982 for the 504: 449:Indianapolis 500 362:Fred Offenhauser 246: 239: 233: 227: 220: 209: 202: 198: 195: 189: 187: 146: 122: 114: 107: 104: 98: 75: 67: 56: 34: 33: 26: 1856: 1855: 1849: 1848: 1847: 1845: 1844: 1843: 1819: 1818: 1817: 1807: 1805: 1800: 1799: 1795: 1786: 1785: 1781: 1774: 1760:Mueller, Mike. 1758: 1754: 1747: 1731: 1727: 1712: 1703: 1695: 1691: 1683: 1679: 1670: 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driver 623: 620: 617: 603: 600: 599: 598: 595: 592: 589: 586: 583: 576: 551: 548: 473:held a famous 471:Lime Rock Park 447:, winning the 394:fuel injection 328: 325: 292: 291: 283: 279: 278: 273: 269: 268: 265: 261: 260: 255: 251: 250: 247: 230: 229: 212: 211: 194:September 2008 126: 124: 117: 110: 109: 89:the key points 79: 77: 70: 65: 39: 38: 36: 29: 15: 9: 6: 4: 3: 2: 1852: 1851: 1840: 1837: 1835: 1832: 1830: 1827: 1826: 1824: 1803: 1797: 1789: 1783: 1775: 1773:9781610608060 1769: 1765: 1764: 1756: 1748: 1746:9780760319185 1742: 1738: 1737: 1729: 1723: 1719: 1715: 1710: 1708: 1706: 1699:, 9/84, p.83. 1698: 1693: 1686: 1681: 1667:on 2012-02-05 1666: 1662: 1658: 1652: 1636: 1630: 1615: 1609: 1593: 1587: 1583: 1572: 1570: 1568: 1566: 1563: 1561: 1559: 1557: 1555: 1553: 1551: 1548: 1547: 1544: 1542: 1540: 1538: 1536: 1533: 1530: 1528: 1525: 1523: 1521: 1518: 1517: 1513: 1511: 1509: 1507: 1504: 1501: 1498: 1496: 1493: 1490: 1488: 1485: 1484: 1481: 1476: 1471: 1468: 1466: 1463: 1461: 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Automotive
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