Resend my activation email : Register : Log in 
BCF: Bike Chat Forums


Big Bang theory?

Reply to topic
Bike Chat Forums Index -> General Bike Chat
View previous topic : View next topic  
Author Message

Whosthedaddy
Super Spammer



Joined: 11 Dec 2005
Karma :

PostPosted: 19:40 - 25 Jun 2017    Post subject: Big Bang theory? Reply with quote

What was the difference in the Big Bang R1 versions over the previous models?
____________________
Current : MSX 125 Past : CBR 900RR Monkeybike : c50 LAC : ZXR750 H2 : FZR600 : ZX7R P3 : YW100 : TRX850: Trophy 900 T309 : GSXR 600 L0: Monkeybike : XJ6S Whosthedaddy
 Back to top
View user's profile Send private message You must be logged in to rate posts

Nobby the Bastard
Harley Gaydar



Joined: 16 Aug 2013
Karma :

PostPosted: 20:22 - 25 Jun 2017    Post subject: Re: Big Bang theory? Reply with quote

Whosthedaddy wrote:
What was the difference in the Big Bang R1 versions over the previous models?


Big bang engines usually have the two cylinders that move together firing together rather than alternate cycles, which is the norm. Both of these use the same crank layout.

Then theres the crossplane, which uses a different crank layout entirely. This ignores the standard layout's natural balance and instead aims to have a power pulse on each quadrant of the crank. Probably makes them quite viby as a result.
____________________
trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Sprint ST 1050
 Back to top
View user's profile Send private message You must be logged in to rate posts

wristjob
World Chat Champion



Joined: 30 Sep 2005
Karma :

PostPosted: 21:27 - 25 Jun 2017    Post subject: Reply with quote

normal 4 cyl goes bang bang bang bang.
big bang goes BANG space BANG space
r1 crosplane goes b,b,bang bang
 Back to top
View user's profile Send private message You must be logged in to rate posts

Whosthedaddy
Super Spammer



Joined: 11 Dec 2005
Karma :

PostPosted: 23:03 - 25 Jun 2017    Post subject: Reply with quote

Sounds like good for the track but not for longevity on the road?
____________________
Current : MSX 125 Past : CBR 900RR Monkeybike : c50 LAC : ZXR750 H2 : FZR600 : ZX7R P3 : YW100 : TRX850: Trophy 900 T309 : GSXR 600 L0: Monkeybike : XJ6S Whosthedaddy
 Back to top
View user's profile Send private message You must be logged in to rate posts

wristjob
World Chat Champion



Joined: 30 Sep 2005
Karma :

PostPosted: 23:07 - 25 Jun 2017    Post subject: Reply with quote

Whosthedaddy wrote:
Sounds like good for the track but not for longevity on the road?


why you say that?
 Back to top
View user's profile Send private message You must be logged in to rate posts

P.
Red Rocket



Joined: 14 Feb 2008
Karma :

PostPosted: 10:59 - 26 Jun 2017    Post subject: Reply with quote

Still the same amount of fire. Just delivered differently. It'll be fine. Non conventional doesn't mean less reliable.
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts

Teflon-Mike
tl;dr



Joined: 01 Jun 2010
Karma :

PostPosted: 11:37 - 26 Jun 2017    Post subject: Reply with quote

Principl comes from the track; late 90's 4-cyl 2-strokes, that firing every revolution have power pulses akin to a V8, ie very smooth, two bangs happening a rev, over lapping, and equispaced.

Suggestion was that the almost trurbine smoothness of power delivery was contributory to the large incidents of high-side slides, and that the almost constant application of force to the wheel, meant that the motor was actually less responsive to changes of throttle, and so was the grip, more the predictability of grip; altering the firing intervals to achieve bigger pulses ad longer gaps between them, more akin to a V-Twin or single was supposed to make them more tractable and predictable, and make the 'power' more useable; which had bee Yamaha's claimed reason for success over Honda, who had for sucessive seasons always had ore power, but not won races on it. Yamaha's theory was that it wasn't about how much, but how useable, and had sacrificed peak for usable... Honda's reply was to make the ore, and try ad make it useable.. hece the big-bang motor's that took Doohan from serial crasher to seriel winer, in a season.

So whatever the theory, practically it did seem it work.

As to the question of reliability; was interesting that when the big-bang motors helped make the Honda's handle, and started leavig the Yam's and Zooks like they had thier own lane; I thik Suzuki were caught with a tape recorder in the pit lane and an osciloscope, tryng to fathom the Honda firig order.. and copied it by re-timing the cranks o ther engines... that then started chucking con-rods! So emprically, not great for engie longevity... And honda did comment that they had had to do a lot of engineering to make the motors hold together with the revised firing intervals.

Making a motor or tractable; implication for a very high powered ad relatively light road bike, would suggest it could have similar ad potentially more advantage, making the machine more manageable... but MEH! If you are riding that close to the ragged edge on the public road, it's unlikley to save many from crashing!
____________________
My Webby'Tef's-tQ, loads of stuff about my bikes, my Land-Rovers, and the stuff I do with them!
Current Bikes:'Honda VF1000F' ;'CB750F2N' ;'CB125TD ( 6 3 of em!)'; 'Montesa Cota 248'. Learner FAQ's:= 'U want to Ride a Motorbike! Where Do U start?'
 Back to top
View user's profile Send private message Visit poster's website You must be logged in to rate posts

Whosthedaddy
Super Spammer



Joined: 11 Dec 2005
Karma :

PostPosted: 12:33 - 26 Jun 2017    Post subject: Reply with quote

Paddy. wrote:
Still the same amount of fire. Just delivered differently. It'll be fine. Non conventional doesn't mean less reliable.


Cool
____________________
Current : MSX 125 Past : CBR 900RR Monkeybike : c50 LAC : ZXR750 H2 : FZR600 : ZX7R P3 : YW100 : TRX850: Trophy 900 T309 : GSXR 600 L0: Monkeybike : XJ6S Whosthedaddy
 Back to top
View user's profile Send private message You must be logged in to rate posts

1198
World Chat Champion



Joined: 24 Jan 2013
Karma :

PostPosted: 12:43 - 26 Jun 2017    Post subject: Reply with quote

wristjob wrote:
normal 4 cyl goes bang bang bang bang.
big bang goes BANG space BANG space
r1 crosplane goes b,b,bang bang


Or in other words....

Teflon-Mike wrote:
Principl comes from the track; late 90's 4-cyl 2-strokes, that firing every revolution have power pulses akin to a V8, ie very smooth, two bangs happening a rev, over lapping, and equispaced.

Suggestion was that the almost trurbine smoothness of power delivery was contributory to the large incidents of high-side slides, and that the almost constant application of force to the wheel, meant that the motor was actually less responsive to changes of throttle, and so was the grip, more the predictability of grip; altering the firing intervals to achieve bigger pulses ad longer gaps between them, more akin to a V-Twin or single was supposed to make them more tractable and predictable, and make the 'power' more useable; which had bee Yamaha's claimed reason for success over Honda, who had for sucessive seasons always had ore power, but not won races on it. Yamaha's theory was that it wasn't about how much, but how useable, and had sacrificed peak for usable... Honda's reply was to make the ore, and try ad make it useable.. hece the big-bang motor's that took Doohan from serial crasher to seriel winer, in a season.

So whatever the theory, practically it did seem it work.

As to the question of reliability; was interesting that when the big-bang motors helped make the Honda's handle, and started leavig the Yam's and Zooks like they had thier own lane; I thik Suzuki were caught with a tape recorder in the pit lane and an osciloscope, tryng to fathom the Honda firig order.. and copied it by re-timing the cranks o ther engines... that then started chucking con-rods! So emprically, not great for engie longevity... And honda did comment that they had had to do a lot of engineering to make the motors hold together with the revised firing intervals.

Making a motor or tractable; implication for a very high powered ad relatively light road bike, would suggest it could have similar ad potentially more advantage, making the machine more manageable... but MEH! If you are riding that close to the ragged edge on the public road, it's unlikley to save many from crashing!
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts

P.
Red Rocket



Joined: 14 Feb 2008
Karma :

PostPosted: 13:37 - 26 Jun 2017    Post subject: Reply with quote

[img]us.123rf.com/450wm/ajt/ajt1501/ajt150100022/35808423-burned-and-broken-computer-keyboard-isolated-on-white-background.jpg[/img]
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts

owl
World Chat Champion



Joined: 21 Oct 2016
Karma :

PostPosted: 13:42 - 26 Jun 2017    Post subject: Reply with quote

Paddy. wrote:
https://us.123rf.com/450wm/ajt/ajt1501/ajt150100022/35808423-burned-and-broken-computer-keyboard-isolated-on-white-background.jpg

____________________
Observation is the greatest source of wisdom.
 Back to top
View user's profile Send private message You must be logged in to rate posts

P.
Red Rocket



Joined: 14 Feb 2008
Karma :

PostPosted: 14:34 - 26 Jun 2017    Post subject: Reply with quote

Cheers. Abroad and really CBF to sort formatting Laughing
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts
Old Thread Alert!

The last post was made 6 years, 298 days ago. Instead of replying here, would creating a new thread be more useful?
  Display posts from previous:   
This page may contain affiliate links, which means we may earn a small commission if a visitor clicks through and makes a purchase. By clicking on an affiliate link, you accept that third-party cookies will be set.

Post new topic   Reply to topic    Bike Chat Forums Index -> General Bike Chat All times are GMT + 1 Hour
Page 1 of 1

 
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum

Read the Terms of Use! - Powered by phpBB © phpBB Group
 

Debug Mode: ON - Server: birks (www) - Page Generation Time: 0.08 Sec - Server Load: 0.49 - MySQL Queries: 17 - Page Size: 79.1 Kb