Returning to the World Motorcycle Grand Prix / 1979

Regaining the Summit

Returning to the World Motorcycle Grand Prix / 1979

The Oval Piston: Heart of a New and Different Breed

To design a 4-stroke, 4-cylinder engine in the conventional manner would not produce a machine that could out perform its 2-stroke rivals. No, for a 4-stroke engine to generate the same level of output as a 2-stroke engine it had to have twice as many cylinders as its competitor. Moreover, 20,000 r.p.m. was the absolute minimum a 4-stroke engine required to produce superior horsepower.

Increased power meant that the 4-stroke engine would have to consume and exhaust more of the critical fuel-air mixture. In other words, the aperture of the valve would have to increase for enhanced intake and exhaust efficiencies. To do that, the number of valves would increase, also. However, conventional circular pistons would accommodate only four or five valves. Furthermore, such a structure would provide no technical advancements, as compared to the time when Honda was competing in the World GP with its 4-valve DOHC engines. Therefore, the NR project's new challenge was to achieve "innovative technology," being more than a mere refinement of the previous technology.

Winning is the essence of racing. Thus, in winning the race, the team could prove that its technology was superior. Hence, there was no significance in creating a machine that was not capable of winning. That would lead neither to technical progress nor to the fostering of outstanding new talent. However, the Honda NR development team knew that to make a comeback in the World GP meant the establishment of a training ground for young talents; people who would strive to improve their skills through the creation of truly great motorcycles. If there were no chance of winning the race or fostering talent, Honda would be better off not trying at all.

Honda's answer was the adoption of an oval-piston design. With eight valves lined up atop the pistons, each supported by two connecting rods, the team's new 4-cylinder engine looked like an 8-cylinder. According to Fukui's calculation, the engine could potentially reach a maximum speed of 23,000 rpm and output of 130 horsepower. Therefore, the target output was set accordingly, at 130 horsepower.

However, the oval-piston design necessitated an extremely difficult manufacturing process, in which machining accuracy would be more critical than ever. Of course, no such design had been adapted for use in a high-performance racing machine. Nevertheless, the spirit of Honda was never to be pessimistic, and the team decided it was worth trying as long as there was a real possibility. In making such a decision the team was well aware of the difficult path ahead. In order to beat 2-stroke engines, they had to transcend common-sense thinking and bring in daring new technologies.

The concept for Honda's new engine was finalized in April 1979, and the NR Block set as its primary goal the realization of an oval-piston engine.

The Challenging Spirit of Honda

A System that Fosters Expertise
  1. A System that Fosters ExpertiseA System that Fosters Expertise
  2. The R&D Center Goes Independent / 1960The R&D Center Goes Independent / 1960
  3. Employing the "My Record" Project and Expert Certification  / 1960Employing the "My Record" Project and Expert Certification / 1960
A Dream Come True: Car Builder for the World
  1. A Dream Come True: Car Builder for the WorldA Dream Come True: Car Builder for the World
  2. Launching the S360 and T360 / 1962Launching the S360 and T360 / 1962
  3. Entering the Auto Market at Last / 1966Entering the Auto Market at Last / 1966
  4. Introducing N360 / 1967Introducing N360 / 1967
  5. Launching the Honda 1300 / 1968Launching the Honda 1300 / 1968
  6. Introducing the CVCC / 1972Introducing the CVCC / 1972
  7. Announcing the Civic / 1972Announcing the Civic / 1972
  8. Introducing the Accord / 1976Introducing the Accord / 1976
Marketing Globally, Producing Lacally
  1. Marketing Globally, Producing LocallyMarketing Globally, Producing Locally
  2. Establishing American Honda Motor Co. / 1959Establishing American Honda Motor Co. / 1959
  3. Establishing Belgium Honda / 1963Establishing Belgium Honda / 1963
  4. Establishing Honda of America Manufacturing / 1980Establishing Honda of America Manufacturing / 1980
A Refreshing New Development
  1. A Refreshing New DevelopmentA Refreshing New Development
  2. Company Leaders Honda and Fujisawa Retire; Kawashima Assumes Presidency / 1973Company Leaders Honda and Fujisawa Retire; Kawashima Assumes Presidency / 1973
Products Emerging From Technology and Innovation
  1. Products Emerging From Technology and InnovationProducts Emerging From Technology and Innovation
  2. The Oval Piston Engine / 1979The Oval Piston Engine / 1979
  3. The Hondamatic Transmission / 1968The Hondamatic Transmission / 1968
  4. The Car Navigation System / 1981The Car Navigation System / 1981
  5. The Airbag System / 1987The Airbag System / 1987
  6. Four-Wheel Steering System (4WS) / 1987Four-Wheel Steering System (4WS) / 1987
  7. The VTEC Engine / 1989The VTEC Engine / 1989
  8. The ME Engine (G100 / 150 / 200 / 300 / 400 Series) / 1977The ME Engine (G100 / 150 / 200 / 300 / 400 Series) / 1977
  9. The ZE Engine (GX110 / 140 / 240 / 270 / 340 Series) / 1983The ZE Engine (GX110 / 140 / 240 / 270 / 340 Series) / 1983
  10. The Dream CB750 FOUR / 1969The Dream CB750 FOUR / 1969
  11. CG125 / 1975CG125 / 1975
  12. Road Pal / 1976Road Pal / 1976
  13. City / 1981City / 1981
  14. The NSX / 1990The NSX / 1990
  15. Odyssey / 1994Odyssey / 1994
  16. Honda EV Plus: The Dream of an Electric Vehicle / 1988Honda EV Plus: The Dream of an Electric Vehicle / 1988
  17. The E300 Portable Generator / 1965The E300 Portable Generator / 1965
  18. The HR21 Lawn Mower / 1978The HR21 Lawn Mower / 1978
  19. The F200 "Komame" Mini-Tiller / 1980The F200 "Komame" Mini-Tiller / 1980
Production Technology: The Essence of Creative Manufacturing
  1. Production Technology: The Essence of Creative ManufaturingProduction Technology: The Essence of Creative Manufaturing
  2. Establishment of Honda Engineering / 1974Establishment of Honda Engineering / 1974
  3. The World's Smallest Welding Line / 1982The World's Smallest Welding Line / 1982
  4. Transfer Lines for Modular Components / 1981Transfer Lines for Modular Components / 1981
  5. An Automated Line for Painting and Coating / 1988An Automated Line for Painting and Coating / 1988
A Neverending Passion for Racing
  1. A Neverending Passion for RacingA Neverending Passion for Racing
  2. Completion of Suzuka Circuit / 1962Completion of Suzuka Circuit / 1962
  3. Returning to the World Motorcycle Grand Prix / 1979Returning to the World Motorcycle Grand Prix / 1979
  4. Formula One Entry: The Initial Phase / 1964Formula One Entry: The Initial Phase / 1964
  5. Formula One Entry: The Second Phase / 1983Formula One Entry: The Second Phase / 1983
  6. Entry to Champ Car Racing / 1994Entry to Champ Car Racing / 1994
  7. The Birth of Twin Ring Motegi / 1997The Birth of Twin Ring Motegi / 1997
Creativity - The Way to Work Harder, Play Harder
  1. Creativity – The Way to Work Harder, Play Harder Creativity – The Way to Work Harder, Play Harder
  2. Holding All Honda Idea Contests / 1970Holding All Honda Idea Contests / 1970
People and Society Coexisting in Harmony with Nature
  1. People and Society Coexisting in Harmony with NaturePeople and Society Coexisting in Harmony with Nature
  2. Establishment of Honda Taiyo, Kibo-no-Sato Honda and Honda R&D Taiyo / 1992Establishment of Honda Taiyo, Kibo-no-Sato Honda and Honda R&D Taiyo / 1992
  3. Creating Hometown Forests / 1977Creating Hometown Forests / 1977
  4. Hosting "Orei-no-kai" / 1991Hosting "Orei-no-kai" / 1991

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