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Whosthedaddy |
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Whosthedaddy Super Spammer
Joined: 11 Dec 2005 Karma :
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Posted: 19:40 - 25 Jun 2017 Post subject: Big Bang theory? |
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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 |
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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
Joined: 16 Aug 2013 Karma :
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wristjob |
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wristjob World Chat Champion
Joined: 30 Sep 2005 Karma :
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Whosthedaddy |
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Whosthedaddy Super Spammer
Joined: 11 Dec 2005 Karma :
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Posted: 23:03 - 25 Jun 2017 Post subject: |
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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 |
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wristjob |
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wristjob World Chat Champion
Joined: 30 Sep 2005 Karma :
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P. |
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P. Red Rocket
Joined: 14 Feb 2008 Karma :
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Teflon-Mike |
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Teflon-Mike tl;dr
Joined: 01 Jun 2010 Karma :
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Posted: 11:37 - 26 Jun 2017 Post subject: |
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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?' |
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Whosthedaddy |
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Whosthedaddy Super Spammer
Joined: 11 Dec 2005 Karma :
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1198 |
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1198 World Chat Champion
Joined: 24 Jan 2013 Karma :
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Posted: 12:43 - 26 Jun 2017 Post subject: |
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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! |
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P. Red Rocket
Joined: 14 Feb 2008 Karma :
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owl |
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owl World Chat Champion
Joined: 21 Oct 2016 Karma :
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P. |
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P. Red Rocket
Joined: 14 Feb 2008 Karma :
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Posted: 14:34 - 26 Jun 2017 Post subject: |
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Cheers. Abroad and really CBF to sort formatting |
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Old Thread Alert!
The last post was made 6 years, 303 days ago. Instead of replying here, would creating a new thread be more useful? |
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