An ESD reader pointed us to this engine Callaway designed that combines four Yamaha inline-four motorcycle engines into a 4.0 L V16 engine. The engine makes 550 bhp at 10,000 rpm and 340 lb-ft of torque at 8,500 rpm. When Autoblog posted their article they claimed there was a prototype with the redline raised to 11,500 rpm which allowed the engine to make 640 horsepower. Although they developed as far back as 2004, I had never heard of it.
The Callaway Cyclone V16 is a prototype engine for a future Callaway project. With its exceptionally-high specific power output, striking visuals and an exhaust note only a high revving V16 can make, this power plant should be reserved for a very special vehicle.
Engine Specifications:
- 16 cylinder, 90° V-angle, aluminum cylinder block with iron liners, aluminum cylinder heads
- 4.0 liter displacement (243.6 cid), naturally aspirated , electronic fuel injection
- Bore: 75.50 mm (2.972″). Stroke: 55.75 mm (2.195″)
- Compression Ratio: 11.5:1
- Valvetrain: DOHC, 5 valves per cylinder, patented camshaft drive system
- Maximum horsepower: 550 bhp @ 10,000 rpm (2.26 bhp/cid, 138 bhp/L)
- Peak Torque: 340 lb-ft @ 8,500 rpm
- Maximum engine speed: 10,500 rpm
- Length: 926 mm (36.45″). Width: 540 mm (21.25″). Height to top of throttle body trumpets: 500 mm (19.70″)
- Dry weight: 152 kg (334 lb)
- Dry sump lubrication, triple plate 5.5″ diameter clutch, electronic coolant pump
This video quality is bad but it gives some idea of what it sounds like.
Not very exciting considering the Hartley H1 V8 made close to those numbers (400hp) with 1/2 the cylinders.
I was blown away when I saw Hartley take two engines and put them together. I just think the Cyclone is amazing because they took four engines and put them together.
But double the torque.
how is 400hp close to 550hp…that’s 150hp off..thats an entire economy car less power…
Short stroke engines rarely have torque, but you have to love the F1 rev range.