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new motor, more power please
http://ducatittandf1.com/viewtopic.php?f=10&t=10795		 Page 1 of 2
Author:  Wolf [ Mon Mar 10, 2014 8:43 am ]
Post subject:  new motor, more power please
Dear folks,

recently I have acquired this nice 650-motor. According to the numbers stamped into the casing it is a 1983-84 Alazzurra motor. Following the book of Ian Falloon it delivers 56 horse power. I would like to pimp it to at least 70 horse power. It should be run mainly on the road but also sometimes on the track. I also have a pair of Pantah cams, which will help to obtain 63 horse power... any suggestion where to find the remaing 7 horses are heartly appreciated.

Since the motor should be implanted in my TT2. I posted my question in the TT2 department.

kind regards

Wolf

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Author:  athleticroman [ Thu Mar 27, 2014 11:44 pm ]
Post subject:  Re: new motor, more power please
Wolf wrote:
I would like to pimp it to at least 70 horse power.


Cut to the chase and send your heads to Steve "The folks in Montreal who I work with on cylinder head stuff can convert the 350 to F1 spec using the same program as used for the Ally heads if that's of interest." viewtopic.php?f=22&t=10757
Author:  Wolf [ Wed May 21, 2014 11:15 am ]
Post subject:  Re: new motor, more power please
thank you for the tip to the Canadians - very hot!

What would think, would this make sense?

Cylinderheads with valves 35/41, camshafts from a 500 Pantah, carbs 36 Dell'Orto, cylinders 750 SS or 750 Paso - the motorcycle is aimed to be used primarly on the road and sometimes on the track...any additional suggestions?


kind regards

Wolf
Author:  brad black [ Fri May 23, 2014 6:54 am ]
Post subject:  Re: new motor, more power please
i'd be thinking about using a later bottom end.

i've never seen reliable specs for pantah cams, but the later 900 cams are probably better for more power. my later 750 has 75 pretty easy hp. high comps, not too much port work, 900 carb model cams.
Author:  Wolf [ Tue Jun 03, 2014 11:31 am ]
Post subject:  Re: new motor, more power please
...on the track again...slowly, I'm becoming faster - the fotographer surely has his share :-)

cheers

Wolf

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Author:  Wolf [ Fri Nov 20, 2015 2:18 pm ]
Post subject:  Re: new motor, more power please
...very slowly the new motor is developing (now i'm thinking about Pistal pistons and 40 Dell'Orto carburetors)...i've found some 800 cams and finally they are machined to fit the pantah heads...the photo depicts on left an unmachined camshaft, the two others are shortened and the new bearing positions are machined on a lathe - the material is well behaving - better than expected :-)

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Author:  618F1 [ Sat Nov 21, 2015 1:43 pm ]
Post subject:  Re: new motor, more power please
Very clever what you have done with the 800 cams Wolf. They do have more lift than the stock 600-750 cams according to Brad's charts.

I put 900SS cams in some 800 heads using the bushings for the missing tach drives on the V cams and thicker washers at the cam end-caps. In essence, putting back what you machined off the 800 cams. Worked perfectly.

MikeV
Author:  DarmahDave [ Sat Nov 21, 2015 9:46 pm ]
Post subject:  Re: new motor, more power please
618F1 wrote:
Very clever what you have done with the 800 cams Wolf. They do have more lift than the stock 600-750 cams according to Brad's charts.

I put 900SS cams in some 800 heads using the bushings for the missing tach drives on the V cams and thicker washers at the cam end-caps. In essence, putting back what you machined off the 800 cams. Worked perfectly.

MikeV


What did you do for a rear head Mike? Or are you running a newer bike with the flipped rear head?

Dave
Author:  618F1 [ Sun Nov 22, 2015 12:22 pm ]
Post subject:  Re: new motor, more power please
I did not have time to build a good 900 engine in 2013 when I went to the NH gathering (TT900SS project). But I had a very new 800 engine, so I made a few changes to it and used that. It was surprisingly fast.

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But, a person could get two 800 H cams (probably cheap) and make the mods that Wolf made to use in a Pantah engine. The 800 cams have about the same duration, but about 2mm more lift Intake and Exhaust. Again, the 900ss cams have 20 degrees more duration, and about 3mm more lift on the intakes.

MikeV
Author:  brad black [ Mon Nov 23, 2015 6:30 pm ]
Post subject:  Re: new motor, more power please
Wolf wrote:
...very slowly the new motor is developing (now i'm thinking about Pistal pistons and 40 Dell'Orto carburetors)...i've found some 800 cams and finally they are machined to fit the pantah heads...the photo depicts on left an unmachined camshaft, the two others are shortened and the new bearing positions are machined on a lathe - the material is well behaving - better than expected :-)


cool. i wouldn't have expected you could machine them on a lathe, i was thinking they'd need to be ground. i have a 620 set i was wanting to modify to fit into carbed 400, but the thought of paying to have them ground was putting me off. i'll stick them in the lathe and see if i can't screw them up.
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