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4v Special from 1989
http://ducatittandf1.com/viewtopic.php?f=26&t=11266		 Page 1 of 1
Author:  sports [ Sun Nov 29, 2015 6:24 am ]
Post subject:  4v Special from 1989
These are a couple of pictures of 'Norman' taken outside the workshop last month. He is still half asleep after a 23 year kip. Built in 1989 by myself as some sort of adolescent futile protest against the 851's infiltrating the BOTT series. He is the next item on the list when the two 500's are packed for Philip Island so will take some more pics as the surgery begins.

Attachments:
File comment: Pic of one side
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File comment: Pic of the other side. Rather obvious really.
2014-01-06 06.12.50.jpg
2014-01-06 06.12.50.jpg [ 7.75 MiB | Viewed 2668 times ]
Author:  ducttf1 [ Sun Nov 29, 2015 2:33 pm ]
Post subject:  Re: 4v Special from 1989
WOW! This may sound strange, but I love Norman! Can't wait to hear this one Glyn. How long did this epiphany take to figure out, and then build? The BOTT changed for me with the water-cooled bikes as well. Lou
Author:  sports [ Sun Nov 29, 2015 3:30 pm ]
Post subject:  Re: 4v Special from 1989
Thanks for your kind words Lou. It would take more than the space here to tell the full story. A bike mag jouranalist once asked me 'why did you make it ?' My simple reply was 'God told me to do it' as the whole effort was a moment of pure madness. Norman took me probably most of 89 to complete on a part time basis. The biggest invisible issue was finding the correct cam belts and machine pulleys with the right combination of teeth to join up the set of dots. Also lost the place to run the std oil pump after drying out the right side of the crank cases. The eventual answer was to use an external gear pump unit with a 12v motor. Weird but never the less a perfect solution.
I entered it for the Motor Cycle News 'special of the year' competition, --- and won it ! The prize was a trip to Daytona for two in Feb 90. Brilliant, time for a break after all that had scratching.
Author:  618F1 [ Sun Nov 29, 2015 3:51 pm ]
Post subject:  Re: 4v Special from 1989
I think this is the bike I posted the article on a few years ago. What a brute; bet is sounds good. For us just entering winter it is nice to see bikes coming out in your summer in OZ. MikeV
Author:  sports [ Sun Nov 29, 2015 8:08 pm ]
Post subject:  Re: 4v Special from 1989
This is the very same bike Mike. only one made, and ever will be.
It sounds splendid, -- even I can't wait.
Author:  boucher [ Mon Nov 30, 2015 5:03 am ]
Post subject:  Re: 4v Special from 1989
Glyn, any idea of how many pony's it produced? Boucher.
Author:  sports [ Mon Nov 30, 2015 5:26 am ]
Post subject:  Re: 4v Special from 1989
No two dyno's work the same so I feel any results draw only a comparison to the previous reading. Norman was tested twice on different dyno's. The best reading I saw was 118bhp at 9.600rpm. A couple of years later by which time I had surrendered to the 8v water cooled onslaught, my 1992 888 Corsa offered 123bhp on the same dyno.
Author:  fmcd92 [ Sat Dec 05, 2015 9:47 am ]
Post subject:  Re: 4v Special from 1989
sports wrote:
No two dyno's work the same so I feel any results draw only a comparison to the previous reading. Norman was tested twice on different dyno's. The best reading I saw was 118bhp at 9.600rpm. A couple of years later by which time I had surrendered to the 8v water cooled onslaught, my 1992 888 Corsa offered 123bhp on the same dyno.


But what about weight and geometry? If that engine isn't a porker the 118 would be about right for getting a light chassis out of tight corners in a class of period machinery. Classic endurance is the group I am presently interested in, here in Canada our classic endurance has class provision up to 1989 so the light, nimble air-cooled TTs are still OK if more so on the tighter circuits.

Well done, sir!

F McDermott
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