Britain’s Eisenberg Racing fitted a V8 engine on a custom motorcycle. The engine displacement is 3000cc while the total output is staggering – 500 hp (if it runs on racing fuel) and 480 hp (on standard gas). The man behind this project is Zef Eisenberg and as hard to believe as it is, the motorcycle is still running some tests in order to become road legal.
The name of this bike is Eisenberg EV8 (don’t mistake the EV for “Electric Vehicle’) and it was designed from scratch by Eisenberg. The V8 motorcycle is fitted with a 3000cc V8 engine manufactured from the ground up by some of the most top engine designers in the UK under the special requirements of Eisenberg. The aim was to create a V8 engine with the ‘correct’ weight, length and height to not affect the motorcycle’s handling. Well, after four years in the making, the end result is quite impressive as the V8 engine with just a 3000cc displacement has a total output of 500 hp at 10,500 rpm running on race fuel and in race-spec. Eisenberg is offering a road version which will be making from 420 hp to 480 hp, according to the fuel map. The maximum torque level stands at 353 Nm (261 lb-ft). We would expect the V8 engine to weight a couple of hundred kilos, but in this case, it weighs just 80 kg (176 lb). What is more mind-boggling is the fact that the total output is achieved without adding any nitrous or turbo.
With so much power, we would expect some serious top speed. During some engine tests, the Eisenberg EV8 hit 207 mph (333 kph). Eisenberg claims that the bike is capable to reach a top speed of 225 mph (362 kph). And all this without using any turbos, blowers, NOS, or fairings. Also, adding some fairings and the top speed can increase up to 250 mph (402 kph). That’s outrageous for a road-legal motorcycle.
Besides the power figures, this V8 engine is different from what you see fit on an American muscle car for example. In other words, a crossplane crankshaft design giving the engine that typical ‘chevy v8’ burble sound thanks to the uneven exhaust pulses. As a result, the American muscle car V8 engines are heavier and bulkier due to the heavy balance shaft which makes them quite a challenge when they are used on motorcycles. The Eisenberg V8 engine, on the other hand, features a flatplane crankshaft which delivers even exhaust pulses. Also, the V8 engine can rev much higher and easier compared to a V8 with a crossplane crankshaft. As an end result, it delivers more hp, it’s revvier, it uses a smaller displacement and it weighs less thanks to the compact design features.
The Eisenberg V8 features eight independent fly by wire, Jenvy throttle bodies with tuned trumpet lengths to provide better airflow and throttle response. The throttle bodies are controlled by a bespoke ECU which offers full ride by wire. As a result, the rider can manage the maximum power delivery of the motorcycle without the need to use various menu controlled power maps. Furthermore, the experienced riders will receive a special red key that, when activated allows full control of the Eisenberg EV8 without electronic intervention.
It took over two years to design the special 6-speed gearbox and as Eisenberg claims, the gearbox was dyno tested and patented. To sustain such a high power delivery, the gearbox features some special elements such a swappable primary gears as we see fitted on GP race bikes.
The Eisenberg EV8 was equipped with a reverse spinning clutch which counteracts gyroscopic inertia. It’s a technical solution used to counteract the considerable inertial response when the rider twists the throttle.
Moreover, the motorcycle features a concentric swingarm design with anti-squat geometry to reduce chain tension issues. By using a smaller 530 chain (rather than a heavier 630) the friction level is reduced and the engine doesn’t lose any horsepower. All in all, it’s a technical solution we don’t get to see on most of the bikes out there. The swingarm alone is made using CNC and billet aluminium that shreds off some kilos to keep the bike’s weight down. The whole bike, especially around the engine, was designed to handle the full stress put through the frame and powertrain.
The Eisenberg EV8 is still in the prototype phase of development and it’s put through its paces going under continuous engine dyno and road testing to make sure that the production bike provides a smooth clutch feel, handling, gearbox, rideability, engine cooling and so on.
The production version of the is underway, but it will have to comply with a bunch of legislation rules in order to actually see it run on the streets. Of course, there’s a price to pay for all this performance and in the UK the price tag will be set around £100,000 (close to US$130,000) which might increase until the production version is completed.