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ducadini
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Post subject: This is a rare picture Posted: Wed Jun 09, 2021 3:07 am |
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Joined: Wed Sep 11, 2013 7:13 am Posts: 268
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Salve Carlo Ti dispiacerebbe spiegare cosa è successo a Spino ? Attachment:
Carlo.jpg [ 621.59 KiB | Viewed 7654 times ]
The article in Motosprint just said something about "rotto la sua Ducati" and then starting (AND winning) in Gr5. Hope the damage is not too big ? ciao joseph
_________________ Nego i ricordi peggiori, richiamo i migliori pensieri
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618F1
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Post subject: Re: This is a rare picture Posted: Wed Jun 09, 2021 10:08 am |
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Joined: Thu Oct 14, 2010 11:23 am Posts: 1826
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Maybe he just had to visit a tree? He and the bike look OK. MikeV
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Carlo
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Post subject: Re: This is a rare picture Posted: Thu Jul 01, 2021 2:21 pm |
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Joined: Thu Oct 28, 2010 4:44 am Posts: 1795 Images: 7
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Ciao Amici, Unfortunately I twisted the crankshaft and connecting rods, I adjusted for the next race, in Frosinone and I still broke the crankshaft, now I have removed the engine block for the second time and I will try to understand where the problem is, the bike has 7 oil pressure bar at idle speed, but I destroyed two crankshafts and 4 connecting rods. I got on the mono 500, which had been standing still since 2017, and I won three consecutive races, in a few days I will open the 1100 engine and will continue to swear and fix it.
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618F1
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Post subject: Re: This is a rare picture Posted: Fri Jul 02, 2021 10:10 am |
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Joined: Thu Oct 14, 2010 11:23 am Posts: 1826
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Ciao Carlo. I said to keep the front wheel on the ground, and not exceed 11,000 RPM1! Which one did you do? Both?
Sorry for your grief. Is this the engine you have used a while, or is it a new one?
Sympathy, MikeV
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ducadini
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Post subject: Re: This is a rare picture Posted: Sat Jul 03, 2021 4:21 am |
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Joined: Wed Sep 11, 2013 7:13 am Posts: 268
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Mike, Carlo sure tries to keep the front wheel on the ground. He's even checking it after the corner. Still having problems staying between the lines though. Picture taken from a movie, gravel flying.
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Carlo.jpg [ 267.88 KiB | Viewed 7338 times ]
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_________________ Nego i ricordi peggiori, richiamo i migliori pensieri
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Carlo
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Post subject: Re: This is a rare picture Posted: Sat Jul 10, 2021 8:21 am |
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Joined: Thu Oct 28, 2010 4:44 am Posts: 1795 Images: 7
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Hi Friends, excuse me if I am very discontinuous in my answers, the engine block that I have seized the crankshaft connecting rods, is the engine block that I use on the Moretti 010, that is modern bikes, practically a Hypermotard with carburetors, the one in the he last photograph below is the 750 tt1 and would be the Moretti 005, which has now been standing still for three or 4 years. I changed the bushings on the crankshaft by doing all the possible procedures, using a bore gauge with three measurements, 12 o'clock, 10 o'clock, 14 o'clock, and adding the measurements and dividing by three, leaving a connecting rod clearance of 5.5 cents of millimeter, I also used plasticage, confirming the measurement made with a bore gauge, but alas, I broke the crankshaft and connecting rods twice. Now I have reassembled the used crankshaft and connecting rods, I checked the ovalization and waxed less than a hundredth of a millimeter, but now I have made a class A shaft with class B connecting rods with 4 red bearing shells coupling, and I have closed everything. Let's hope it's the right time, I found two breaks I think due to shrinkage caused by no minimum running-in of the engine, since I don't have the possibility to do this, in uphill races you can do a free practice session, but you struggle to to run in, now I should have more than 5.5 cents, I think 6 cents, it's as if a bike has already done 1000 km. Fingers crossed.
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CrankyRoller
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Post subject: Re: This is a rare picture Posted: Sun Jul 11, 2021 8:19 pm |
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Joined: Tue Oct 05, 2010 9:21 am Posts: 276 Images: 0
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I must ask... is it both rods seizing or the horizontal only? -Cranky-
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Carlo
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Post subject: Re: This is a rare picture Posted: Tue Jul 13, 2021 2:20 am |
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Joined: Thu Oct 28, 2010 4:44 am Posts: 1795 Images: 7
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618F1
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Post subject: Re: This is a rare picture Posted: Tue Jul 13, 2021 10:28 am |
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Joined: Thu Oct 14, 2010 11:23 am Posts: 1826
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Damned! I would really like to hear more about this observation of yours Cranky.
I have long noticed that more horizontal cylinder scuffing seems normal with these engines, and attributed it to Isaac Newton (gravity). Makes me wonder about other old Italian engines with one H cylinder. Is there something else going on? Please tell us.
MikeV
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CrankyRoller
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Post subject: Re: This is a rare picture Posted: Tue Jul 13, 2021 10:15 pm |
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Joined: Tue Oct 05, 2010 9:21 am Posts: 276 Images: 0
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I've seen some failures and have been involved with some analysis. Various issues contribute to big end failures. Oil passages have sharp edges the way they are drilled and I've seen stalactites hanging in these passages locked in after heat treat. Those passages can be worked out with some creative swear words and abrasive rope. The finish on the journal is rather rough and needs micro polishing and certainly setting bearing clearance on a race engine especially this one should be set on the loose side....on the order of .0025-.003 inch. Oil pump pressure relief needs to be checked for smooth operation. This is the style that is built into the side cover and flaws have been observed. The relief spring needs to be shimmed to verify 100 PSI pressure at say 3500RPM with hot motor. I communicated directly with Carlo as the language barrier can be an issue. I think he had things figured out already... Hes no amateur. -Cranky-
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