Les premiers essais débuteront un peu plus tard au cours de cette année.

Hennessey Performance, le préparateur texan a dévoilé la Venom F5 en 2017. Elle remplace la Hennessey Venom GT. Le développement est en cours, mais la fin semble toute proche. Hennessey a annoncé que le moteur de la Venom F5, un V8 de 6,6 litres de cylindrée, produirait 1842 ch pour 1617 Nm de couple.  

Pour développer ce moteur hors du commun, l'entreprise utilise des matériaux légers pour le vilebrequin, les pistons et le bloc moteur lui-même. On peut citer d'autres pièces du groupe motopropulseur comme le collecteur d'admission en aluminium, l'arbre à cames en acier, les culbuteurs montés sur l'arbre en acier inoxydable, le système d'huile à carter sec, etc. 

Le moteur est doté d'une conception unique qui abaisse la température de l'air des turbocompresseurs lorsqu'il entre dans la chambre à combustion, ce qui entraîne une plus grande densité d'air et un meilleur rendement énergétique. Cela aide le moteur à produire sa puissance élevée, le moulin offre plus de 1355 Nm de couple de 2000 à 8000 tr/min.  

Galerie: Hennessey Venom F5

Avec un poids en ordre de marche inférieur à 1360 kg, la Venom F5 de Hennessey s'annonce comme une puissante hypercar qui vise à détrôner la Bugatti. Pour rappel, la Chiron Super Sport 300+ a dépassé la barrière des 300 mph. L'objectif du fabricant américain et de faire de même, en allant, pourquoi pas, au-delà de la vitesse à laquelle a roulé la Chiron.

Source: Hennessey
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Hennessey Venom F5 Engine Delivers 1817 Horsepower

A Texas-Built Twin Turbo V8 Engine Named “FURY”

Sealy. Texas– After an extensive engineering and development phase, the Hennessey team has done it again. The company’s all-new Venom F5 engine produces an astounding 1817 horsepower and 1193 lb-ft of torque. Based on the classic American V8 architecture, the Hennessey V8 engine uses a combination of high-tech, light weight engine components (crankshaft, pistons, connecting rods & custom engine block) that combine for 6.6L of displacement. Combined with a pair of Precision ball bearing twin turbochargers with 3D printed titanium compressor housings, the Venom F5 engine delivers over 1800 bhp at 8000 rpm!

“We exceeded our target horsepower number. Actually, we blew our target number out of the water by delivering over 1,800 horsepower,” said company founder and CEO, John Hennessey. “The F5 engine has a very broad power band with over 1,000 lb-ft of torque available from 2,000 to 8,000 rpm. Give it the full throttle and it’s the most furious engine that we have ever built. Thus, we gave our F5 engine a special name: “Fury."

“Fury” also incorporates a unique Venom F5 intake manifold design which places the intercooler between the plenum and cylinder heads. This unique design allows the inlet air temperatures coming out of the turbos to be greatly reduced before the charge air goes into the combustion chamber, thus resulting in greater air density and greater overall power efficiency. Rounding out the engine package, “Fury” has a multi-stage dry sump oiling system that keeps Pennzoil 10w60 synthetic motor oil flowing through the heart of the beast at all times and at its 8000 rpm redline.

“This is a very important milestone in the building of our all new Venom F5,” said Hennessey. “With over 1800 bhp and a curb weight of less than 3000 lbs, the Venom F5 will offer the best power to weight ratio on the market. We plan to begin testing our first car later this year.”

Hennessey Venom F5 V8 Engine Specifications:

  • Power: 1817 bhp @ 8,000 rpm
  • Torque: 1,193 lb-ft @ 5,500 rpm
  • Redline: 8,200 rpm
  • Displacement 6.6 liter (400 CID)
  • Bore: 4.125 in.
  • Stroke: 3.750 in.
  • Billet aluminum intake manifold with integrated air to water intercooler system
  • Forged aluminum pistons (10.0:1 compression ratio) with steel extreme duty wrist pins
  • Forged steel light weight H-bean connecting rods
  • Extreme duty forged steel connecting rod bolts
  • Light weight extreme duty billet steel crankshaft
  • Forged steel V8 engine block with billet main caps, increased cylinder wall & deck thickness & 6 bolts per cylinder
  • High-flow aluminum cylinder heads with canted titanium intake valves and Inconel exhaust valves with dual valve springs
  • Extreme duty billet steel hydraulic roller camshaft
  • Extreme duty hydraulic roller lifters
  • Extreme duty billet steel pushrods
  • Extreme duty stainless steel shaft mounted rocker arms
  • Dailey Engineering 4 Stage billet dry sump oiling system
  • Dailey Engineering Billet CNC aluminum oil pan
  • Pennzoil 10w60 synthetic motor oil
  • Precision ball bearing twin turbochargers (76 mm billet aluminum compressor wheels) rated at 1,350 bhp per turbo, making 23 psi boost pressure at 1,817 bhp
  • 3D printed titanium turbo compressor housings
  • High-flow twin turbo wastegates
  • High-flow twin turbo blow-off valves
  • High-flow billet aluminum 90 mm dual throttle bodies
  • High-flow fuel injectors, 2 per cylinder
  • High-flow stainless steel twin turbo headers with 1 7/8 in. primary tubes
  • High-flow stainless steel 3.0 in. twin turbo downpipes
  • High-flow catalytic converters
  • High-flow 3.5 titanium exhaust system