Ferrari 120-Degree V6 Charged Engines

The 296 GTB is the first Ferrari road car to sport a V6 turbo with a vee with an angle of 120° between the cylinder banks, coupled with a plug-in electric motor.

120° vee configuration with equally-spaced firings as well as the positioning of the turbos inside the vee which produces a much more compact engine and optimally distributed masses.

The architecture is also ideal in terms of combustion sequence and the integration of the intake plenums and the engine supports on the intake sides of the cylinder heads. The engine is thus lighter and more compact because of the elimination of the plenums and exterior supports, while the fluid-dynamics benefit from the reduction in volumes, boosting intake efficiency. The 120° vee architecture, which offers more space between the cylinder banks than a 90° vee, meant the turbos could be installed centrally, thus significantly reducing the unit’s overall size and the distance the air has to cover to arrive in the combustion chamber, maximising the fluid dynamics and efficiency of the intake and exhaust line ducts.

The IHI turbochargers have been completely redesigned using higher performance alloys. This meant the maximum revs of the turbos could be increased to 180,000 rpm, with a consequent improvement in performance and boost efficiency, which increases by 24%. The symmetrical, couter-rotating turbos are of the mono-scroll type: the technical solutions adopted have reduced the compressor wheel diameter by 5% and the turbo rotor 11% compared to the V8 applications, despite the very high specific power. The reduction in the rotating masses (the inertia of the two rotating elements has been reduced by 11% compared to the 3.9l V8 solution) has reduced the spool up time ensuring instantaneous power delivery.

The 120° V architecture guarantees a symmetrical firing order while the equal-length, tuned exhaust manifolds combined with the single exhaust line outside the hot-V amplify the pressure waves. These characteristics are what lend such purity to the orders of harmonics, which are further helped by a limiter that hits an impressive 8500 rpm. The patented “hot tube” has been completely redesigned for the 296 GTB and is positioned prior to the exhaust gas treatment systems so that it channels the pure sound into the cabin, further enhancing driver involvement and excitement.

1980 126 CK

“Spaghetto” exhaust pipes

1981 126 CX

‘Comprex’ supercharger was developed with BBC Brown Boveri.

1985 156-85
1986 F1-86

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