2-Liter V8 Engine
 

The ideal sports car engine has the following attributes:
- high-revving
- high output
- wide power band
- small size
- lightweight
- Ferrari sound

Is it possible to combine these characteristics in one engine at a fraction of the cost of a Ferrari V8?
Yes!

That’s what Cyclone Power engineers did by joining two Yamaha superbike engines together on a common crankshaft.

The idea may sound simple, but the cam drive, crankshaft, crankcase, bearings, sump, cooling and oil systems have to be custom built. It took two years of development to sort out the bugs. The final product is one amazing V8.

The Cyclone V8 features a flat plane crankshaft and contra-rotating banks of camshafts, such that the engine operates like two four-cylinder units. This design allows the use of many standard Yamaha parts to keep costs down. A cylinder fires at every 90-degree of crankshaft rotation.

The cam drive mechanism is contained within the engine – between the middle two cylinders. The engine is very short since external cam pulleys are not required.
The aluminum crankcase is machined from billet.

Cyclone Y40R V8

Induction: Normally Aspirated
Valvetrain: 5 valves per cylinder

Displacement: 1997 cc
Bore: 75.5 mm
Stroke: 55.75 mm
V-angle: 90 deg

Power: 302 hp @ 10000 rpm
Torque: 167 lb-ft @ 8500 rpm

Weight: 73 kg (161 lb)
Length: 460 mm (18.1 in)
Width: 540 mm (21.3 in)
Height: 430 mm (16.9 in)

Lubrication system: Dry Sump

Engine sound: close to a Formula 1 racecar


After the extremely successful testing sessions on both the dyno, and racking up considerable mileage in our Quantum Extreme development car, we are now ready for the next stage in the Y40R development.

In the form of eight 40mm diameter fuel injection throttle bodies, sequentially injecting fuel to the cylinders, and being fired by eight Denso individual ignition coils, all controlled by the latest Motec M800 engine management system.

The Motec M800 system not only controls all engine functions, but has considerable data logging capacity, and a full range of special functions:
- traction / launch control
- rev limit (hard / soft for ignition and fuel)
- wide and narrow band lambda control
- power shift ignition cut control
- warning alarms

http://www.motec.com

The Cyclone V8 can be mated to a Drenth or Hewland sequential gearbox for front & mid-engine applications.

http://www.cyclonepowerltd.co.uk

Thinking about an engine swap?
The Y40R is perfect for sports cars such as Lotus Elise, Mazda Miata, Honda S2000, Porsche Boxster, Toyota MR2, BMW Z3 …etc.

Used Miata + Y40R = Affordable Supercar

yup, this is the way to do it: something for americans to learn from.

only problem?? cost for production (those engines ain't cheap... componentry and the like), and the DURABILITY of the engine... a maintenance schedule and rebuilds only MORE intensive than owning a YZF-R1?? not exactly what sports-car owners have in mind.

"driveability"?? out the window??
"torque"?? *severe rolleyes* gone.
this is an engine for those who know how real performance is achieved :D

sweet engine though... but i think it'd sound more EXACTLY like a Yammy, and not like a Ferrari ;)

oops!! nearly forgot: Thanks Super :D

:D

A+ for coolness.

C for practicallity.

It can't be that easy to swap in. But once done it would be badass.

Dammit! I said two years ago that Honda should've used this kind of a set-up in the S2000. Now someone's beaten me to it! It actually puts out more power AND torque than the S2000's 2.0L four, so drivability wouldn't be a problem, I think.

Honda now has a 998cc 4-cyl in the CBR1000RR (see the "Fast, fast, FAST" thread) that supposedly generates 170 - 180Hp and 70 - 80 lb-ft at the crank. Put two of them together and you've got 340Hp and 140lb-ft. Even better, Honda has been building a 170Hp, 80lb-ft 1100cc engine for years for the CB1100XX. Put two of those togehter and The S2000 would've had a 2.2L, 360Hp V-8 from the start!

Furthermore, service intervals and reliability of the CB1100 engine are comparable to that of a Honda car, so that wouldn't be a problem. It's a proven engine with a stellar track record. And it's fuel injected, so no messing with carbs. Dammit, Honda, think outside the box!

Honda CBR1100XX engine and 2004 S2000 chassis is a potent combination.

http://www.cbr1100xx.org

The best tuner for this project is Comptech. They have extensive V8 racing engine and S2000 experience.

http://www.comptechusa.com

A 2000cc V8 has lower mass and friction compared to two 1000cc Inline-4s. The eight cylinders in a V8 drive one crankshaft instead of two. As a result, the V8 is more powerful than the I4s.


Benefits of flat-plane crankshaft (crank pins at 180°) V8:

- low rotational inertia (smaller counter weights)

- low center of gravity (smaller crankcase)

- good low-end torque (easier to match intake and exhaust resonance over a wide rev range)


A superbike engine’s short stroke and small pistons help to minimize vibrations.

V8 Dry-sump Crankcase Design

An integral sump/cap structure seals off the four sections of the crankcase from one another. It had been discovered in racing that running each pair of cylinders with what was in effect an independent V2 crankcase provided a reduction in windage losses that translated into a significant horsepower gain.