Ferrari Jano engine

Source: Wikipedia, the free encyclopedia.
For the V6 Dino engine designed by Vittorio Jano, see Ferrari Dino engine.
Water cooled
Chronology
PredecessorFerrari Lampredi engine
SuccessorFerrari Colombo engine

Vittorio Jano designed a new 60° V12 engine for sports car racing for Ferrari. This new engine, introduced in 1956, combined elements of both Colombo and Lampredi engines with new features.[1] Engine architecture was more of Lampredi school but retained smaller Colombo internal measurements. Jano moved to Ferrari along with his designs for the Lancia D50 in 1955 and went on to design not only a new V12 but also a family of the Dino V6 engines soon after.[2] Some of the technical ideas came from the Jano's Lancia V8 DOHC engine, intended for Formula One. This family of engines replaced Lampredi inline-4s known from Ferrari Monza line and went on to win many international races and titles for Ferrari.[3] The design team comprised Jano as well as Vittorio Bellentani,[4] Alberto Massimino (best known for the Maserati 250F), and Andrea Fraschetti.

Andrea Fraschetti (1928–57), Ferrari engineer

All Jano engines used

DOHC configuration with chain-driven camshafts and two valves per cylinder.[5]

Applications

290 MM

Type 130 was the first engine designed by Jano for Ferrari.

Weber 36 IR4/C1 carburettors this powerplant produced 320 PS (235 kW; 316 hp) at 7200 rpm and could achieve 280 km/h top speed. Only four cars were made, all bodied by Scaglietti as spyders.[9] The Ferrari 290 MM that used this engine was a highly competitive race car at its time.[10]

290 S

Type 136 was introduced in 1957 for the

Weber 42DCN carburettors. The power grew slightly to 330 PS (243 kW; 325 hp) but at higher, 8000, rpm. Compression and top speed remained the same.[7] This car was very short lived and same year, after a couple of races, upgraded to the 315 specification.[13]

315 S

Type 140 was a first step forward in terms of capacity.[14] Redesigned in 1957 and enlarged to 3,783.40 cc (3.8 L; 230.9 cu in) thanks to bigger 76 mm bore with the same stroke as before.[15] Power output was now 360 PS (265 kW; 355 hp) at 7800 rpm. Same six Webers setup, compression ratio and spark plugs arrangement remained. Double camshafts per bank engine was not only more powerful than previous single-cam engines but also lighter and more reliable, which was important in long distance racing.[16] The Ferrari 315 S with this engine won the last Mille Miglia in 1957.[2]

335 S

Type 141 also debuted in 1957 on the

Weber carburettors were upgraded to 44 DCN type. Compression ratio was slightly upped to 9.2:1 which resulted in 390 PS (287 kW; 385 hp) at 7400 rpm of maximum power.[17] The Ferrari 335 S equipped with this engine could top 300 km/h.[12]

312 S

Type 142 was very short lived installed in a single chassis ever produced. Due to tragic events at the

Spa Francorchamps Grand Prix in May 1958, the car was quickly converted into the 412 S.[20]

412 MI

412 S engine closeup

The

Weber 42DCN carburettors, it could produce up to 447 PS (329 kW; 441 hp) at 7700 rpm. It was the most powerful of the Ferrari engines to date.[21] Luigi Musso won qualifying at a record average speed of 280.8 km/h (174.5 mph). The actual race was divided into three heats and, with an aid from Phil Hill and Mike Hawthorn, the 412 MI was able to finish third overall, just behind two purpose-built American competitors.[22]

412 S

Type 141 again found its way into a sports racing chassis.[19] This time as a result of a conversion from the 312 S in 1958. This model is usually confused with the 412 MI due to a similar name. The engine was based on the 4.0 L unit from the MI with a higher compression ratio and the same 42-type carburettors. It could produce an impressive 432 PS (318 kW; 426 hp) at 8000 rpm.[23] The car was raced in California by Phil Hill, Richie Ginther and John von Neumann (Ferrari distributor for California).[19]

Racing successes

Ferrari race cars sporting Jano-designed V12 engines scored many victories in Europe and internationally. In 1956, the

1000 km Nürburgring
. In 1957, the 290 MM won the 1000 km Buenos Aires.[25] Same year the 315 S scored 1-2 victory at the Mille Miglia[26] and third place at the 1000 km Nürburgring with the highest Le Mans score of fifth place. The 335 S won 1-2 at the Gran Premio de Venezuela[27] and finished second at the Nürburgring and the Swedish Grand Prix. In the short-lived Race of Two Worlds, ran in 1957 and 1958 only, the highest place of any European entrant was achieved by the Ferrari 412 MI. The Jano V12 engines helped Ferrari achieve 1956 and 1957 World Sportscar Championships. In 1956 the 290 MM scored two out of five rounds and in 1957 three different Jano-engined models won three out of seven rounds.

After rules change for 1958 season, imposing a 3.0 L total capacity limit, most of the Jano sports cars became obsolete.[14] In the end Ferrari moved towards ubiquitous Colombo 250 engined sports and GT cars, winning 1958 World Sportscar Championship solely with the 250 Testa Rossas.

D50 V8

Lancia-Ferrari D50 V8 engine

Vittorio Jano being a talented engineer, designed many different types of engines in his career. When Enzo Ferrari brought him from

Ferrari D50 and was powered by a 2,485.98 cc (2.5 L; 151.7 cu in) engine with 76 x 68.5 mm of bore and stroke and capable of 265 PS (195 kW; 261 hp) at 8000 rpm.[28]

V8 engine was redesigned yet again for 1957 Formula One season and used in the

Ferrari 801 F1 single-seater. Now it could deliver 275 PS (202 kW; 271 hp) at 8400 rpm. Compression was 11.5:1 and four Solex 40 PII carburettors were installed.[29] Engine was of a quad-cam configuration and had a dry sump.[30] The 801 design team also included Carlo Chiti.[31]

See also

References

Wikimedia Commons has media related to Ferrari Jano V12 engine.
  1. ^ "Ferrari 290 MM". supercars.net. Retrieved 3 July 2019.
  2. ^ a b c d Schlegelmilch, Rainer W. (2004). Ferrari. Könemann. pp. 84–89.
  3. ^ "Driven by the Greats: 1956 Ferrari 290 MM Leads RM Sotheby's Los Angeles Auction". conceptcarz.com. Retrieved 3 July 2019.
  4. ^ Profiting from History Archived 2007-09-29 at the Wayback Machine quotes Phil Hill referring to the Jano V12 as the "Bellentani engine".
  5. ^ "Ferrari 290 MM". auto.howstuffworks.com. Retrieved 3 July 2019.
  6. ^ "Ferrari 290 MM". ferrari.com. Retrieved 3 July 2019.
  7. ^ a b Acerbi, Leonardo (2012). Ferrari: All The Cars. Haynes Publishing. pp. 98–99.
  8. ^ "Ferrari 290 MM". mitorosso.com. Retrieved 3 July 2019.
  9. ^ "Ferrari 290 MM Register". barchetta.cc. Retrieved 3 July 2019.
  10. ^ "1956 Ferrari 290 MM by Scaglietti". rmsothebys.com. Retrieved 3 July 2019.
  11. ^ "Ferrari 290 S". ferrari.com. Retrieved 3 July 2019.
  12. ^ a b "1957 Ferrari 335 Sport Scaglietti". artcurial.com. Retrieved 3 July 2019.
  13. ^ "Ferrari 290 S Scaglietti Spyder". barchetta.cc. Retrieved 3 July 2019.
  14. ^ a b c "1957 Ferrari 315 S". conceptcarz.com. Retrieved 3 July 2019.
  15. ^ "Ferrari 315 S Register". barchetta.cc. Retrieved 3 July 2019.
  16. ^ "Ferrari 315 S". ferrari.com. Retrieved 3 July 2019.
  17. ^ "Ferrari 335 S". ferrari.com. Retrieved 3 July 2019.
  18. ^ "Ferrari 312 S". ferrari.com. Retrieved 3 July 2019.
  19. ^ a b c "Ferrari 412 MI (312 S)". barchetta.cc. Retrieved 3 July 2019.
  20. ^ "Grand Prix Spa 1958 Race Results". racingsportscars.com. Retrieved 4 July 2019.
  21. ^ "Ferrari 412 MI". formula1.ferrari.com. Retrieved 3 July 2019.
  22. ISBN 1-40545-690-6
    .
  23. ^ "Ferrari 412 S". ferrari.com. Retrieved 3 July 2019.
  24. ^ "Mille Miglia 1956 Race Results". racingsportscars.com. Retrieved 4 July 2019.
  25. ^ "1000 km Buenos Aires 1957 Race Results". racingsportscars.com. Retrieved 4 July 2019.
  26. ^ "Mille Miglia 1957 Race Results". racingsportscars.com. Retrieved 4 July 2019.
  27. ^ "GP Venezuela 1957 Race Results". racingsportscars.com. Retrieved 4 July 2019.
  28. ^ "Ferrari D50". formula1.ferrari.com. Retrieved 4 July 2019.
  29. ^ "Ferrari 801 F1". formula1.ferrari.com. Retrieved 4 July 2019.
  30. ^ "Ferrari 801". f1technical.net. Retrieved 4 July 2019.
  31. ^ "801". mitorosso.com. Retrieved 4 July 2019.

Bibliography

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