If you think the Hayabusa V8 is the epitome of motorcycle engines adapted to automotive use, think again, there's another player in town, the Callaway Cyclone V16. This 80 valve V16 is made from a specially built common crankcase which mounts 4 Yamaha 1000cc inline 4 top ends.
If you follow the world of high performance Corvettes, the name Reeves Callaway will be very familiar, for years he's been turning standard Corvettes into something on another performance level altogether. Callaway Cars helped develop the Yamaha 5 valve heads so when he started thinking about building a show car, he thought a truly spectacular engine would be appropriate and the Yamaha engines came to mind.
Callaway Cyclone V16
4.0 liter 16 cylinder 90° V angle
5 valve / cylinder DOHC
bore 75.5 (3.0 in.) x stroke 55.75 mm (2.19 in) = 3994 cc (243.83 cu. in.)
aluminium block and heads, iron liners
12 (2 x 6) main bearings, plain
crankshafts: en40b steel, 2x, 4 journal, flat plane, nitrided
connecting rod, steel, plain bearing
compression ratio 11.5-1 naturally aspirated
power 550 bhp@10,000 rpm
torque 340 ft/lb@ 8,500 rpm
max rpm- 10,500
dry sump lubrication, 1 pressure, 3 scavenge stages
super unleaded fuel
EFI single fuel injector / single throttle / cylinder
926 length (36.45")
540 width (21.25")
500 height (19.7") - to top of injector trumpets
Dry weight- 152 kg (334 lbs.)
patented, Cyclone cam drive system
clutch- superclutch triple plate 5.5"
water pump- ecu driven, vari-speed electric unit
They had the engine out to a car show a few days ago where the Autoblog boys found it and said the current state of tune allows a redline of 11,500 rpm so the horsepower is now up to 640.
If you have the slightest trace of motorhead tendencies within you, this engine is the stuff of dreams. If you think you can handle the sensory experience, you should listen to this baby run! The Callaway link has a few sound files, ... ah ... I have to go and cool off now.