[Hayabusa Zooka]

Team

I want to fit a 200hp suzuki Hayabusa motorcycle engine into my sierra. Does anyone have advise while I commence planning for the project.

The zook will be reduced to 2x4 as part of the conversion.

Running gear will be upgraded to match power unit.

[bumstein]

Why? Not trying to be funny or discouraging I’m just quite interested in what you’re looking to achieve.

I couldn’t really give you any meaningful advice myself however I wouldn’t have thought a Hayabusa motor would have gone well in a Sierra. It may have HP but won’t have a great deal of torque (I’m hypothesizing here), you’ll be taking a motor that powers a roughly >260kg bike into a roughly estimated >900kg car. Of course I may well be wrong.

What gearbox are you looking to use? And how will the Sierra diff ration (3.7 or 3.9:1) compare with the chain drive of the Hayabusa?

[vet 180]

bumstein wrote:

Why? Not trying to be funny or discouraging I’m just quite interested in what you’re looking to achieve.

I couldn’t really give you any meaningful advice myself however I wouldn’t have thought a Hayabusa motor would have gone well in a Sierra. It may have HP but won’t have a great deal of torque (I’m hypothesizing here), you’ll be taking a motor that powers a roughly >260kg bike into a roughly estimated >900kg car. Of course I may well be wrong.

What gearbox are you looking to use? And how will the Sierra diff ration (3.7 or 3.9:1) compare with the chain drive of the Hayabusa?

I am not so sure about that, the busa engine has a rather flat torque curve and considering the stock bike runs over 130kph in first gear it’s more about finding the right gearing and torque to the ground. The engine is a rever, but with the right gearing it could work.

To the OP, how do you plan to go 4x2?


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[bumstein]

^ I consider myself corrected

[suzukikid]

i remeber there was a hybusa sierra around in america years and years ago

[Gwagensteve]

Interesting.

How much experience do you have with Sierras? If you resolve the transmission issues you’ll have to resolve how to make it corner and stop. Sierras can be a handful with stock power.

[Gwagensteve]

So I did a bit more research and reading on Hayabusa powered cars.

General consensus is the stock gearbox can't cope with the load of (even a) <500kg car - and by "car" I mean a track car that's very aerodynamic and doesn't have to deal with any stop start. They last "a couple of thousand miles" before wearing out.

In normal bike fashion, the gearbox is integral with the engine and in a cutaway you can see the flywheel isn't driven off the end of the crank- so the bare engine can't be bolted to a car style flywheel readily.



In fact, this site seems to be the best resource of how to do it.

https://motoiq.com/project-miatabusa-pa ... -thinking/

but, you'll note it's 8 years old and there's been not-very-much activity about road car based transmission options since. All up it looks like an expensive and very complicated way of getting 145Kw and 150ish Nm* into a Sierra.



* except it's not. or something. Because crank speed is dropped by 0.626 into the input shaft, I'm not sure how output is actually measured. I rather hope Suzuki isn't having their cake and eating it too with how they're expressing power. Here's why I'm confused (and why it's relevant. Engine dyno graphs show peak power at 9750rpm. We know the input of the transmission sees 6103rpm when the engine is spinning 9750rpm - so what's the real HP figure? is it 158hp @ 9750rpm CRANK SPEED or is that 158HP at the input shaft? because if the 158HP is at the crank, the input shaft is seeing 98HP @ 6103rpm. Woopty doo.

Sure, the torque figure comes out at 132Nm at 7000rpm, and if the input is downstream of that, you're hitting the gearbox with 211Nm at 3500rpm, and that's awesome, but it explains why the Hayabusa gearbox can't handle the weight of a car - there's no way a bike can take 211NM in low gear - even a full power run to VMax would only see the bike at peak torque for seconds in the higher gears. It also raises questions about transmission choice for a Sierra swap.

As far as I have seen, the Hayabusa engined "sierra" (buggy) built years ago had the Hayabusa gearbox into either another transmission input or the transfer. The result was incredibly low gearing, which is one way to prevent the engine having to transmit full torque, and a way of sparing the motorbike gearbox from high load. I don't think that's what you have in mind Hayabusa Zooka.

[Stocky]

I can’t see it working
I ran a highly modified Suzuki gsx to 1200 cc in the speedway, most of the are cut always with a remote sump with minimal weight...like the passion to do it but your money spent is better elsewhere.

[Gwagensteve]

I agree lots of the reading I was doing was about the requirement for a dry sump in a car application.

[ZUZUKI]

A guy at work is building a "Triking" - a kit car he imported from England. This uses a Moto Guzzi something or other - not sure of the model, but I think it is 1200cc, EFI, Vtwin 5 speed sequential gearbox, but the reason they use this engine (and gearbox, and drive shaft unit and rear diff / wheel assembly) is that it's a neat, contained package for a single rear wheel drive trike, which weighs about 400kg complete (+ driver / passenger).
He bought a whole bike (2006? model) & stripped it.
Currently, Moto Guzzi do a 1380cc, produces 71kW @ 6500 & 120Nm @ 2750 - comparable to a G16B really, so a lot of work, for little benefit, but at least it wouldn't / shouldn't be too hard to run the driveshaft to a Sierra T/case.
Rgs, Michael