Re: "Krypto" the world's fastest Indian

Thread approved.

Re: "Krypto" the world's fastest Indian

Welcome aboard!

As speeds go up, you need aero assist and a lot of power. It's never proportional to the cubic capacity anymore.
As they say, you can hit 200 kmph with 600cc and 120 hp but to reach 350+, you need more than twice of that and some!

First, a mill capable of running 331 kmph may not get legally cleared, so you'd need permits for that.
Secondly, it's not a copy paste job. 440cc dual cylinders may not make 42 hp and ~40 nm. Even if you quadruple the blocks, by simple copy paste math we get a measly ~90 hp and some 80 torques.
This won't be enough to hit the speed you're looking at. Even if it reaches 250 kmph, it would require a long runway to be able to accelerate to such speeds and brake safely.
You're looking at completely revised geometry, reinforced chassis, engine and gearbox work (obviously), sprocketing, wheels, brakes, aero etc, along with a ballsy rider.
Costs involved will be huge and 90 days maybe too short for this project. It takes a long time to eliminate issues and tinker with small bits to make a vehicle road worthy.

It would be a lot cheaper to find a broken big bike and maybe make the necessary mods and do whatever you want to do.
But why do you aim to hit 331 kmph anyway? 220 mph (220 cc bike) translates to 350+ kmph.

Re: "Krypto" the world's fastest Indian

What Divya sharan has said is completely true. I would like to add some more points.

It is totally impossible to take a crude bajaj engine and make it fly at 331 kmph, even if you add 6 such engines to make it 1320cc!

High speed is derived at higher gears (obviously) and the engine needs ridiculously high amount of torque (say 100 Nm or more) to keep accelerating (beyond 200 kmph) in higher gears against the wind and rolling resistance.

Now you can never derive higher power and torque from crude engines made by our Indian manufacturers, all the basics of mechenical engineering are wrong in them. Superbike makers have poured in decades of knowledge and experience to design powerful engines and they have to even make a high tech factory for doing so. Even if you get your hands on the blueprints of a Yamaha MT-01, you won't be able to make it in any factory of India!

And as divya sharan pointed out, even the wheels, chasis, brakes, swing-arm, handlebar, forks, pratically the entire motorcycle needs to be redesigned to handle such high speeds of 331kmph.

You should have taken more achievable projects like a motorcycle engine powered racing car, etc etc.

Re: "Krypto" the world's fastest Indian

I have also the same words as they two guys above me said.
In order to achieve that much of speed you will need to change almost everything on P220.
Installing a high capacity V4 engine require complex Fuel ignition system, pump, cooling components, fuel delivery system, air intake should I say RAM intakes and powerfull electrical system to keep pumping igniters and injectors, etc. You will have to enlarge the stock frame which will eventually hamper the handle bar and swing arm and what NOT! A much better idea is to forget P220 and select a frame that can carry large mill, say RE 650 frame, or spend few days making a frame of yours.

Result --- You may get extreme vibrations, just 150kmph speeds or so, disappointment, discouragement, Poor final year project marks, less CGP in overall 8 semester, jokes on you, serious fractures on your body or even death.

It would be much better if you describe WHY YOU WANT TO DO THAT! What is the logic behind that?

Y2K, Ducati, etc etc have already achieved those speeds way long back and they won't appreciate you for riding above 200 kmph on a DIY motercycle. So no point of making somethings which already exist.
Better to look for a project that doesn't exist, is out of your classmate's minds, have logic behind it.
Make your P220 fly at 60kmph or even at 100 with good stability instead of running it on tarmac at 331. Stock torque and Bhp units are very much enough to drive a large propeller for given 300kg of gross weight. You will be appreciated for making a flying bike.

Still, If you are hell bent towards 331 on P220, then don't give a damn to others. Look for small turbine engine or something similar.

Re: "Krypto" the world's fastest Indian


Not possible.

Re: "Krypto" the world's fastest Indian

Buy a Hayabusa, try to slap p220 body on it. That's the most you can do in 90 days.

Re: "Krypto" the world's fastest Indian

I think before the powerplant is a concern, you should consider the actual frame and geometry of the bike as well.

The smaller commuter bikes are designed to be unstable. This makes them easier to maneuver in traffic and through tight city streets. When you get to highway speeds, they tend to get a bit squiggly, and at the speeds you are talking about - I would hazard to guess the chasis and components would have gone well outside of any reasonable stability.

I don't know the parameters of your project, whether you are requiring yourself to use the stock frame, forks and suspension or if you are just making it a Pulsar in spirit? If you look at topspeed bikes around the world - you will notice a lot of things that they have in common. Stretched out, dropped down and with a fairing that blocks any and all air from hitting the driver and other bits that would cause increased drag.

After you have that worked out, swap out all the bearings for high quality components. It sounds a bit small - but it all adds up. Being within 0.1 or 0.01 out of round makes a big difference when you are trying to achieve records. While at it, forged components are more uniform then cast - so, make friends with a machine shop...bone up on your understanding of the infernal combustion engine, stroke vs displacement for thermal efficiency, cam profiles, durations, fuel maps, exhaust design, forced air systems (supercharged or turbocharged)…

Though, as opposed to trying to fabricate a new engine side by side, just daisy chain them together. It is something which is much simpler to implement and would end up being more inline with your time frame.

Each engine is located one after the other - just like a pintle rider sits behind the driver. The output shaft from the front engine is connected to the output shaft in the engine behind it. So, on and so forth for as far as you have frame to fit them and patience to get the timing right. The final engine has the functioning transmission which will connect to the drive wheel.



I think that that would also be more in keeping with the idea of it still being a Pulsar. Once you start talking about creating a new engine block - it really is no longer a Bajaj engine even if you use the same approximate geometry.

Power output would be close to 1+1+1 - though, you will have some losses due to the linkages and additional rotating masses.