Suzuki Hayabusa Inline Five

Post here information about your own engineering projects, including but not limited to building your own car or designing a virtual car through CAD.
Rage
0
Joined: 08 Jan 2018, 18:03

Suzuki Hayabusa Inline Five

Post

I think this is a very cool project :)

https://www.engineswapdepot.com/?p=20296

User avatar
humble sabot
27
Joined: 17 Feb 2007, 10:33

Re: Suzuki Hayabusa Inline Five

Post

I'm trying to understand the justification for ever building a 5 cylinder at all. But It's an interesting choice.
the four immutable forces:
static balance
dynamic balance
static imbalance
dynamic imbalance

Facts Only
188
Joined: 03 Jul 2014, 10:25

Re: Suzuki Hayabusa Inline Five

Post

People have literally run out of things to do with Hay abusa engines by the looks of it. Turbocharged, Supercharged, Big Bore, Long Stroke, billet block for hewland gearbox, V8 version all been done so now it's this. Seems a tad pointless but I bet it will sound mental.
"A pretentious quote taken out of context to make me look deep" - Some old racing driver

roon
412
Joined: 17 Dec 2016, 19:04

Re: Suzuki Hayabusa Inline Five

Post

Opinions Only wrote:
26 Jan 2018, 12:51
People have literally run out of things to do with Hay abusa engines by the looks of it. Turbocharged, Supercharged, Big Bore, Long Stroke, billet block for hewland gearbox, V8 version all been done so now it's this. Seems a tad pointless but I bet it will sound mental.
Single, twin, triple, I6, V16, flat-8, and coffee-table variants still have yet to see the light of day.

User avatar
RicME85
52
Joined: 09 Feb 2012, 13:11
Location: Derby
Contact:

Re: Suzuki Hayabusa Inline Five

Post

humble sabot wrote:
26 Jan 2018, 06:06
I'm trying to understand the justification for ever building a 5 cylinder at all. But It's an interesting choice.
Isnt it hat they are just trying to squeeze an extra cylinder into an existing frame rather than plucking 5 cylinder out of the air as an idea for a project

User avatar
humble sabot
27
Joined: 17 Feb 2007, 10:33

Re: Suzuki Hayabusa Inline Five

Post

Why one then? Why not two and end up with a straight six? They're inherently smoother.
People have been making V8s from motorcycle engines for a few years now.
the four immutable forces:
static balance
dynamic balance
static imbalance
dynamic imbalance

User avatar
RicME85
52
Joined: 09 Feb 2012, 13:11
Location: Derby
Contact:

Re: Suzuki Hayabusa Inline Five

Post

because that is all the space they have got in the existing frame

Maritimer
19
Joined: 06 Sep 2017, 21:45
Location: Canada

Re: Suzuki Hayabusa Inline Five

Post

Nevermind this, passive aggressive negative voters can kiss my butt :lol:
Last edited by Maritimer on 29 Jan 2018, 21:09, edited 1 time in total.

User avatar
humble sabot
27
Joined: 17 Feb 2007, 10:33

Re: Suzuki Hayabusa Inline Five

Post

I've never heard that.
the four immutable forces:
static balance
dynamic balance
static imbalance
dynamic imbalance

Benard Bonhomme
0
Joined: 15 Nov 2017, 15:52

Re: Suzuki Hayabusa Inline Five

Post

Maritimer wrote:
29 Jan 2018, 15:33
Inline 5 have the best natural balance iirc, even better than 6s
It is not about the balance, but the irregularity of the engine. Generally, engines with an uneven number of cylinders have an irregularity way better than engines with an even number of cylinders:

https://www.gtisoft.com/wp-content/uplo ... ITE_GM.pdf

sosic2121
13
Joined: 08 Jun 2016, 12:14

Re: Suzuki Hayabusa Inline Five

Post

Maritimer wrote:
29 Jan 2018, 15:33
Inline 5 have the best natural balance iirc, even better than 6s
I don't think that's true. Inline 5 requires balancing shaft.

Maritimer
19
Joined: 06 Sep 2017, 21:45
Location: Canada

Re: Suzuki Hayabusa Inline Five

Post

sosic2121 wrote:
29 Jan 2018, 19:24
Maritimer wrote:
29 Jan 2018, 15:33
Inline 5 have the best natural balance iirc, even better than 6s
I don't think that's true. Inline 5 requires balancing shaft.
Good enough then, lower internal friction might be what im thinking of

Greg Locock
233
Joined: 30 Jun 2012, 00:48

Re: Suzuki Hayabusa Inline Five

Post

True boxers, I6 and v12 (which is basically two I6s) have the best natural secondary balance . A balancer shaft works at one harmonic only (typically twice crankshaft speed aka second order) , but the piston on crank assembly generates a whole series of forces, not just second order.

i5s and v10s aren't horrible, but they aren't anything like as smooth as an I6 unless they have a balancer shaft. I3s and 90 degree V6s and your usual I4 all create lots of powerful inertial forces.

Roughly speaking an I4 vibrates at 20 g rms at the redline at WOT, an I6 is at 5g rms. 10-1000 Hz.

The disadvantage of I6s and so on is that the crankshaft is so long that you run into torsional and bending problems with the crank.

Friction wise, the fewer cylinders the better for a given capacity , and a balancer shaft also adds friction.

Tommy Cookers
617
Joined: 17 Feb 2012, 16:55

Re: Suzuki Hayabusa Inline Five

Post

a Mr Duckworth said DFV valve motion produced bigger forces than those normally regarded as the causes of vibration

63l8qrrfy6
368
Joined: 17 Feb 2016, 21:36

Re: Suzuki Hayabusa Inline Five

Post

Tommy Cookers wrote:
29 Jan 2018, 22:55
a Mr Duckworth said DFV valve motion produced bigger forces than those normally regarded as the causes of vibration
Mostly because his 'constant acceleration cams' were particularly bad.
DFV cams were pretty out of date even for that time - the acceleration profile consisting of 3 'constant acceleration' plateaus resulted in infinite jerk at each transition.

His compliant idler was a clever band aid but spring failures were never really cured.