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Registered
Members: 640 | Total Threads: 50,828 | Total Posts: 518,566 Currently Active Users: 1,045 (0 active members) Please welcome our newest member, Mrtom1100s |
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15-12-2019, 03:55 PM
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#1 | |
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Too much time on my hands member
Join Date: Jun 2007
Location: Forest Of Dean
Bike: S2r
Posts: 3,201
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Quote:
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"The final measure of any rider's skill is the inverse ratio of his preferred Traveling Speed to the number of bad scars on his body." Song of the sausage creature |
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15-12-2019, 07:11 PM
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#2 | |
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Registered User
Join Date: Dec 2010
Location: Oslo
Bike: S2r
Posts: 428
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Quote:
Very close to a pure race tune. Probably missing larger exhaust valves and tiny bit of added compression to exceed 100 bhp. Would be useless as a street bike..... |
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16-12-2019, 02:22 PM
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#3 |
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Bronze Member
Join Date: Jul 2006
Location: Poole
Bike: M900ie
Posts: 472
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The book is called "Four-stroke performance tuning" IBSN 97818442531142 printed by Haynes I believe, but I simply used an on-line calculator using a formula from the book. Due to the endless variables referred to above, I can only take the results as a guide to what the actual situation in my case is likely to be. I find that you can often make pretty sound decisions if you understand the general "tendencies" of a particular situation and have some concept of what magnitude of change will make a "significant" difference. Even where you don't actually know all the science/engineering of the subject.
Having spouted all this I just wish that I had realised how restricting the standard 40mm headers were when I had the 944cc engine in the bike, I might have even saved myself the heartache of replacing it with a 1078 lump?! Bitza.
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Bitza |
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17-12-2019, 09:41 PM
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#4 | |
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Registered User
Join Date: Nov 2017
Location: Barnsley
Bike: M1100s
Posts: 238
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Quote:
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Always remember. Your home is at risk if you set fire to it. |
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18-12-2019, 07:14 AM
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#5 | |
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Registered User
Join Date: Dec 2010
Location: Oslo
Bike: S2r
Posts: 428
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18-12-2019, 09:45 AM
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#6 | |
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Join Date: May 2007
Location: Stockbridge
Bike: M900
Posts: 1,984
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Quote:
https://www.laverdaforum.com/forum/i...?topic=81409.0
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Original and Best since 1993 |
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18-12-2019, 09:51 AM
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#7 |
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Join Date: May 2007
Location: Stockbridge
Bike: M900
Posts: 1,984
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Original and Best since 1993 |
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19-12-2019, 10:26 PM
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#8 |
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Bronze Member
Join Date: Jul 2006
Location: Poole
Bike: M900ie
Posts: 472
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Hi Kato if you're still out there, can you give me /us a bit more on the "collector outlet sizing" bit?! Generally you seem to be strongly confirming my original scepticism about going as far as 50mm for primaries on a road bike, any comments on the fact that I am planning on using twin silencers, 45mm ID basically mufflers with a reverse cone exiting via a slash cut 50mm pipe Bitza.
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Bitza |
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