Offenhauser

Source: Wikipedia, the free encyclopedia.
This article is about the racing engine. For the speed parts company, see Offenhauser Sales Corporation.
Offy
Offenhauser Racing Engines
IndustryAutomotive
Founded1933
FounderFred H. Offenhauser
ProductsRacing engines

The Offenhauser Racing Engine, or Offy, is a

open wheel racing for more than 50 years and is still popular among vintage sprint and midget car racers.[1][2][3]

History

The "Offy" engine was derived from this Miller marine engine
An Offenhauser sprint "midget" racer

The Offenhauser engine, familiarly known as the "Offy", was an

fuel injection.[6] 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 Leo Goossen
, further developed the Miller engines into the Offenhauser engines.

In 1946, the name Offenhauser and engine designs were sold to Louis Meyer and Dale Drake. It was under Meyer and Drake that the engine dominated the Indianapolis 500 and midget racing in the United States.[7] 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 and refined the engine until its final race days.

One of the keys to the Offenhauser engine's success and popularity was its power. A 251.92 cubic inch (4,128.29 cm³)

monobloc construction made it immune to head gasket or cylinder stud problems, and allowed for higher cylinder pressures.[8][9]

From 1934 through the 1970s, the Offenhauser engine dominated American

open-wheel racing, winning the Indianapolis 500 27 times. From 1950 through 1960, Offenhauser-powered cars won the Indianapolis 500 and achieved all three podium positions, winning the pole position
in 10 of the 11 years.

The Offenhauser shop began to do machine work for Lockheed 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 Pearl Harbor attack. Leo Goossen finally became a full-time Offenhauser employee in 1944, and Fred Offenhauser sold the company in 1946.[7]

In 1959

oval tracks
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.

When Ford came onto the scene in 1963, with much increased competition and sanctioning body rule changes,[

Domino's Pizza Pocono 500, in an Eagle chassis driven by Jim McElreath
, although two Vollstedt chassis with Offenhauser engines failed to qualify for the 1983 Indianapolis 500.

Common Offenhauser engines

An Offenhauser midget engine, polished for display
Offenhauser midget car engine - front view

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 blocks, pistons, rods, and crankshafts to specific customer requests. However, certain engine sizes were common, and could be considered the "standard" Offenhauser engines:[7]

  • 97 cu in (1.59 L) - to meet the displacement rule in many midget series
  • 220 cu in (3.6 L) - displacement rule in AAA (later USAC) sprint cars
  • 270 cu in (4.4 L) - displacement rule for the Indianapolis 500 under AAA rules[11]
  • 255 cu in (4.18 L) - for Indianapolis (during the 1930s fuel consumption rules)
  • 252 cu in (4.13 L) - displacement rule for Indianapolis under USAC rules
  • 168 cu in (2.75 L) - displacement rule for turbocharged engines at Indianapolis (to 1968)
  • 159 cu in (2.61 L) - displacement rule for turbocharged engines at Indianapolis (1969 and later)

World Championship Indianapolis 500 summary

From 1950 to 1960, the Indianapolis 500 was a round of the

World Drivers' Championship
.

Season Cars entered Winning driver Second driver Third driver Pole sitter Race report
1950 31 Johnnie Parsons Bill Holland Mauri Rose Walt Faulkner Report
1951 32 Lee Wallard Mike Nazaruk Manny Ayulo Report
1952 30 Troy Ruttman
Jim Rathmann
 Sam Hanks Fred Agabashian Report
1953 32 Bill Vukovich Art Cross Sam Hanks Bill Vukovich Report
1954 34 Bill Vukovich Jimmy Bryan Jack McGrath Jack McGrath Report
1955 35 Bob Sweikert Tony Bettenhausen Jimmy Davies Jerry Hoyt Report
1956 32 Pat Flaherty Sam Hanks Don Freeland Pat Flaherty Report
1957 31 Sam Hanks
Jim Rathmann
 Jimmy Bryan Pat O'Connor Report
1958 31 Jimmy Bryan George Amick Johnny Boyd Dick Rathmann Report
1959 33 Rodger Ward
Jim Rathmann
 Johnny Thomson Johnny Thomson Report
1960 33
Jim Rathmann
 Rodger Ward Paul Goldsmith Eddie Sachs Report

See Indianapolis Motor Speedway race results for a more complete list.

In the 11 World Championship years, the Meyer-Drake Offenhauser engine partnered for at least one race with the following 35 constructors:

Complete Formula One World Championship results

(excluding the 1950-1960 Indianapolis 500) (key)

Year Entrant Chassis Engine Tyres Drivers 1 2 3 4 5 6 7 8 9 10 Points WCC
1959 Leader Cards Inc. Kurtis Kraft Midget
L4
 ? MON 500 NED FRA GBR GER POR ITA USA 0 -
Rodger Ward Ret
1960 Reventlow Automobiles Inc
Scarab F1
L4
 D ARG MON 500 NED BEL FRA GBR POR ITA USA 0 -
Chuck Daigh DNA DNQ DNS Ret DNS 10
Lance Reventlow DNQ DNS Ret
Richie Ginther DNS

References

  1. ^ "Kings of Indy: the phenomenal Miller-Offenhauser I4 engine". 27 November 2021. Retrieved 23 May 2022.
  2. ^ "This Offenhauser Racing DOHC four is the most storied of American racing engines". Retrieved 23 May 2022.
  3. ^ "Offenhauser. The Greatest Racing Engine Ever Built?". 24 December 2012. Retrieved 23 May 2022.
  4. ^ "Fred Offenhauser". National Midget Auto Racing Hall of Fame. 1999. Archived from the original on 2012-02-05. Retrieved 2008-09-06.
  5. ^ Circle Track, 9/84, pp.82-3.
  6. ^ Circle Track, 9/84, p.83.
  7. ^
    ISBN 978-1-62654-041-5
  8. ISBN 9780760319185
    – via Google Books.
  9. ISBN 9781610608060
    – via Google Books.
  10. ^ "The Immortal Offenhauser Racing Engine". 16 March 2017.
  11. ^ "Assembling A 270ci Offenhauser IndyCar Engine: Step By Step". 3 March 2015. Retrieved 23 May 2022.
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