Mighty boy with motorbike engine.

MightyBoy tech questions and answers.
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Brayden
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The difference being that the Clubmans are RWD and you can simply output from the 'busa box into the driveshaft. FWD would be tricky to rig up.
F8B EFI turbo - Three pots and a snail.
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Husky
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Ive done some searching on the net and found a small ford metro in the states with a old CBR 900 motor. It looks to me from the photos that there is a chain drive off the sprocket to another sprocket where the drive shafts are bolted. The only thing it doesnt have a reverse cause it was for a track car.
If you look on the net putting bike motors in cars is something thats been around for a while. Each car is going to have its challenges with specific motors and be it RWD or FWD.
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Billie
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Z cars make a rwd mini with hayabusa, its rear engined, which means it uses a trans axle. Would be possible to put in front of mighty boy, if width of mini is same, custom driveshafts needed, but if you have cable linkage that would be easy, hydraulic clutch like you said, maybe using a 1000cc engine, hayabusa may not fit, although it fits in the mini quite nicely.
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Husky
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The reason Im thinking gixer 1000 motor is that its lighter and more compact than the busa donk. Being smaller may help in the fab side of things, brackets mounts etc,(more room in engine bay) Also standard power is not much different compare to the new/current gixer 1000 motor. Being lighter it will not affect handling as much as a heavier motor. I think its going to help in the balance of the MB. Imagine a power to weight of 400bhp/tonne :D Of course bikes are faster but you can be more comfy and stay dry when its raining in the MB.
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Billie
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Bikes are faster, emmm no. More traction off the line in a car, thus having 4 wheels. Cornering speeds are pretty much doubled in a car, more power is achievable, unless you have that 500hp hayabusa. Yeah smaller engine would be great, for changing hoses etc. You would need about 220hp from your motobike to get 400hp per tonne, thats if the engine weighs the same as a 800cc. You would also lose grunt being in a car with more weight than a bike, especially off the line, it would definatly bog down, trying to rev the bastard. A guy did a ford escort mk2 with a cb900 motor, it had to be turboed just to get it to go properly, theres a website with it, cant remember exact details. The wear on the engine would also be an issue, motorbikes dont have hat much touque too, just high hp firgures. If it was me i'd go ducati for the sound or kawasaki for power, they have decent touque. I have a feeling a 1000cc wont fit between the struts, going by pics of a motobike. And reverse gear hehe. Even though it would be easy to get out and push it, maybe use a goldwing? They have a starter motor trick that makes it reverse, not an actural reverse gear. Someone told me that had air cond also. But they are v6, i think.

Good luck.
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pat
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Husky wrote:Thanks Brayden,
Do you recommend any engineers in Sydney. (North shore, Northern beaches area)?
Thanks
Look, There’s no one wanting to see a crazy powerful Rwd mightyboy overtaking Rex’s and Evo’s more than me and I don’t want to be kill joy but to even get the modifications you will be looking at to even get near road legal state, you will have to be real close to an engineer.
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Billie
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If its awd and has 12 inch disc brakes it might.
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Husky
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let me quantify the "bikes are faster comment" generally speaking in outright accleration to most cars they are quicker. Double corner speeds from a car?
I understand the whole power to weight issue. I have spent many hours lightning my race bikes to improve braking handling and accleration.
The reverse gear can be done mechanically. It comes down to having enough room to locate and operate mechanical devices.
I love the debate about cars and bikes. Its one that will always get people reved up :) There are so many factors invovled in which one is faster. Ive always been a bike man and yes a Formula 1 car will leave a bike for dead on a circuit, but it wont lift the front wheels like a bike :D
Al_Zhiemer
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Ok, everyone else has had an opinion, so here's mine... Putting a motor bike engine into a mighty boy, or for that fact any car in my opinion is a waist of time... Main reason, where is the torque?? Hp is good, don't get me wrong but at the end of the day its torque that you require.

Torque is what is used to get a mass moving... Hp keeps that mass moving at speed... Well, thats a basic explanation... The weight of the mighty boy is going to have at least 400 - 500 kilos more weight than a bike, getting it moving from a standing start is going to be sluggish and a standing start on a steep hill... thats gonna be a bitch and alot of broken parts or worn clutches from slipping it to get it moving... once you have the mass moving and the Hp takes over, it will start to get up and go but then you hit a hill and have no torque to get up it at speed.

Watch the smartuki clip of the white one drifting, you can't say that its really drifting... Sure its sideways but drifting??

As a promtional stunt or for a vehicle that will spend 90% of its life on the track where it can be kept high up in the RPM, go for it but as an every day street driven vehicle... Its a definate pass from me.

But in saying all that, if you can get to work it'd be awesome little weapon. Good luck with it.

The Honda Goldwing is a flat 6, a boxer engine like VW/Porsche/Subaru. At 1.8 ltrs and being a shaft drive, if there is enough room to slide that engine in between the towers i see this as being a good option. By memory they make about 120 odd Hp and 120 lbs of torque and at low RPM, it should get the mighty boy moving nicely Won't get the insane revs your looking for but its still a bike engine/car cross bread.

Like i said though, good luck with it.
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Brayden
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While you guys were talking out of your arses I did some research and found some factual information. :P

GSXR 1000 motor puts out 120+kw and 110nm torque. The bike itself weighs roughly 200kg.

Standard F5A puts out 19kw and 35nm torque. Vehicle weighs roughly 550kg.

I think a gixxer motor would move an MB quite nicely. However as Al pointed out it wouldn't exactly make a good daily driver or something that you'd want to drive in stop/start situations. The geabox and clutch would be under decent pressure from the extra 350kg.
F8B EFI turbo - Three pots and a snail.
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Husky
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How can you go backwards power and torque wise from a F5A MB? People are forgetting this is a 650cc 3 cylinder motor :-o
The thing is if you use the right final gearing it is in effect a torque multiplier. A gixxer will do 300km/h. With the final drive ratio sorted out you could get alot of torque and lower the top speed. It also puts less stress on the clutch. I honestly dont think power or torque would be a problem with a 1000cc gixer motor. The car would weigh maximum 300- 350kgs more than the bike.
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ike849
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the bike engine will be fine, but you will be stomped all over by a well setup car do to the lack of low down torque for the first 20m or so.....who cares :roll: (even if you do gear it down as you will be changing gears too early and that is the biggest factor in acceleration times)

but that's not what this car would be about....straight line speed is for tools who put nismo stickers on their bonnets!!!! having a lighter engine and revs makes corner speeds and braking a lot of fun!!!!!

then again if you did get a 1000cc 2smoker DFI in there torque would not be an issue!!!!!! :twisted: :twisted: :twisted:

again look at the diff that smartuki supply, compact, tuff and has reverse built in with a synchro mesh!!!! parts are there, you just have to build the subframe or new engine mounts...

only downside is that it retains the FWD.....

cars vs bikes, it's all got to do with the rider/driver......show me a 'normal' car driver that has the driving/riding ability of a 'normal' bike rider... fact is if you got them both on a track day the bike would win hands down....car drivers generally don't know there machines as well as a bike rider... an equal race driver vs race rider well the car has the advantage depending on the track itself...

either way bikes are more fun :D :D
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Billie
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Lol i love cars and bikes. Do the conversion. Daily driver would be an absoulute pig, i finaly have my mighty boy running, with just 1 problem atm, thats a world record. There was a race between car bike and boat. Boat stood no chance, ohh if anyone didn't know this, a bugatti veryron can out accelerate a f1 car, but gets owned in the corners. I'd assume this would be the same for a shelby ssc areo.
Al_Zhiemer
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yes, while the motorbike engines do make torque it will suffer due to the fact the engine doesn't have the recipricating mass of a car engine. from my understanding and pls correct me if i'm wrong but the more recipricating mass (ie: heavier flywheel), the better the engine will hold its torque. the first sign of a steep hill and i bet it would die in the arse real quick, definatly not as much as a F5A though :-)

reducing the final drive is an option but i think by doing this you would possibly loose the use of the first 2 - 3 gears as they would be to low to be of any use... i did say that this was only a possiblity.

As much as i'm a big turbo fan, i'd be looking at a supercharger for it. don't know how well they would work with such high RPM but it would at least help with your low down torque and Hp (let me edit that: it would help your bottom end torque and Hp) more than a turbo.
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stevan_istheman
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This debate will rage for months if the story isn't set straight...

Bike engine in a car:
Big Hp = Good
Big torque = Bad because it's in the wrong place...
It might have 100+Nm of torque but that's pretty useless if it's over 8000-10000RPM. Down low i'd be betting it has heaps less than an F5a.

If you look at a dyno readout of a car engine the torque band is very low compared to bike engines. This all relates to the stroke of the engine and as it was said weight of internal components, roller bearing cranks,etc.
Basically:
Less stoke = More revs but less torque (torque band comes in further up the rev range)
More stroke = Less revs and more torque (torque band is lower in the rev range)

Example:
Landcruiser 2F 4.2L inline 6 petrol has buckets more torque than the later model engine 3F 4.0L inline 6... they shortened the stroke to make the later engine rev more for highway use... less torque but more power.
It was a compromise.

As it was said before, if the car is gonna be purely track/show driven go for it... love to see it. Daily drive, hell no.

My 2 cents :wink:
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