They have modified many 900cc Supersport(91-97) syl. heads for 2 spark plugs, but that is easier in that air/oil cooleed engine... Some of them used Harley coils.
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| upgrading desmodue to dual spark! http://ducatipaso.org/forum/viewtopic.php?f=9&t=3067 |
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| Author: | ducapaso [ Thu Feb 19, 2009 6:30 am ] |
| Post subject: | upgrading desmodue to dual spark! |
Just linked from "forum desmodromico" : how to machine stock heads to place a second spark plug! Just get drunk watching pics!!! |
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| Author: | paso750 [ Thu Feb 19, 2009 9:18 am ] |
| Post subject: | Re: upgrading desmodue to dual spark! |
no links With dual spark conversions you really have to know what you`re doing. If the timing is not set exact you can ruin your engine pretty fast. |
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| Author: | Finnpaso [ Thu Feb 19, 2009 10:17 am ] |
| Post subject: | Re: upgrading desmodue to dual spark! |
They have modified many 900cc Supersport(91-97) syl. heads for 2 spark plugs, but that is easier in that air/oil cooleed engine... Some of them used Harley coils.
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| Author: | englishstiv [ Thu Feb 19, 2009 11:11 am ] |
| Post subject: | Re: upgrading desmodue to dual spark! |
main site link is here for those interested written English also available http://www.desmodromico.com/homepage.htm |
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| Author: | ducapaso [ Fri Feb 20, 2009 7:02 pm ] |
| Post subject: | Re: upgrading desmodue to dual spark! |
here's the link! It didn't worked yesterday  The write about 350, 650 750 and 900 heads machined to place a second plug! I have not enough time to read the entire topic  So busy by now! |
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| Author: | persempre907 [ Fri Feb 20, 2009 8:46 pm ] |
| Post subject: | Re: upgrading desmodue to dual spark! |
Unfortunately, it can't be read by not registered users. I tried to register to that forum, but seems the administrator has to authorize me before I can read that forum. Ciao |
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| Author: | ducapaso [ Sun Feb 22, 2009 8:23 am ] |
| Post subject: | Re: upgrading desmodue to dual spark! |
This is the work made by a guy from Torino This is the site of another one from Milano 
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| Author: | ducapaso [ Sun Feb 22, 2009 8:25 am ] |
| Post subject: | Re: upgrading desmodue to dual spark! |
And this is from an american site... |
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| Author: | persempre907 [ Sun Feb 22, 2009 10:07 am ] |
| Post subject: | Re: upgrading desmodue to dual spark! |
Very interesting. On a 900 engine, he has reached 92hp, from 78hp of the stock engine. If someone needs the translation... Ciao |
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| Author: | higgy [ Sun Feb 22, 2009 3:21 pm ] |
| Post subject: | Re: upgrading desmodue to dual spark! |
So he has raised the compression to 13:1 with a new set of pistons,ported the head with new valves,added Benzene to the fuel as well as the additional spark not your average street mod 
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| Author: | Finnpaso [ Sun Feb 22, 2009 5:15 pm ] |
| Post subject: | Re: upgrading desmodue to dual spark! |
More compression=more power, simple. But lifetime of engine will be much lower. Its wiser to make more CC*s, than only compression... But Ducapaso is very good in marketing, as he put some pipe there(upside down, like newer Ducati forks...  ) with stamped "made in Italy"... Are you working with marketing ??? 
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| Author: | higgy [ Sun Feb 22, 2009 7:06 pm ] |
| Post subject: | Re: upgrading desmodue to dual spark! |
I wonder what power increase you could have by a mild compression boost, say 10:1 and the port and polish with the extra spark. Adding the second plug seems to be fairly easy and I do have a spare set of heads and cylinders,hmmmmm another project to put on the todo list, if I ever get through the honeydo list Antti! your a genius
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| Author: | Finnpaso [ Sun Feb 22, 2009 7:37 pm ] |
| Post subject: | Re: upgrading desmodue to dual spark! |
Dual spark is not bad idea at all, as also factory have gone that way.... Its good for fuel burning surely. Its much easier to do to air/oil cooleed engines, than to water cooleed ones. If do such to water engine, then have to be VERY sure about water/oil lines in sylinder head. Surely that can be done also, but i wouldnt do it to my OWN "water heads". As i told earlier, many guys have done it to air /oil cooleed 900cc SS engines with quite good results, but its not only way to get more power.... There is also big bore kits, etc... ALL depends, HOW MUCH MONEY u are ready to invest such old bike, as Pasos are... I think that allways... With enough money u can also take flight to space...
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| Author: | Tamburinifan [ Sun Feb 22, 2009 11:09 pm ] |
| Post subject: | Re: upgrading desmodue to dual spark! |
What is the power difference between 2V 1000 & 1000DS? I think dual spark is mainly for emissions, not power, but what do I know.... 
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| Author: | higgy [ Sun Feb 22, 2009 11:54 pm ] |
| Post subject: | Re: upgrading desmodue to dual spark! |
dual spark is strictly a flame propagation thing, related to higher octane fuels required for higher compression ratios.don't think anyone wants to go there ...again that is why he adds green benzene in the 13:1 version of his mod I don't actually think dual spark would add anything to a normal compression engine but it would sure be cool
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