søndag 20. februar 2011

Parts arrived

The package from Dellorto arrived. Nothing smells like a new, freshly oiled carburetor in the afternoon....
...



For every part there is at least one interface and for a carburetor there is at least four. The next part of the project is to define the layout of the blow thru setup.  As a part of that a manifold that fits the carburetor in one end and the shovel heads in the other end is a good starting point. In addition I need to figure out if I need a fuel pump in order to overcome the pressure created by the turbo. I also need do design an inlet manifold to the 2 inlets of the carburetor as an interface towards the turbo. The fourth item on the list is to make a solution for the throttle cable. Isn't it great receiving one parts create the need for 4 more!

In adition the push rod cover kit arrived from Justified Defiance, also from Ebay.





For this build I have been so lucky that through heavy budget negotiations with the wife I have managed to order a new motorcycle table lift. This one the way from GASOLIN.NO:





Don't mind the bike - That will soon be replaced by a Harley!

As a result of the interface questions from yesterday the following is concluded:
The consequence of the blow through configuration is that the fuel supply to the carburetor need to be pressurized in order to compensate for the turbo pressure. In order to do so an electrical fuel pump is required. To secure that the fuel supply pressure is varying with the turbo pressure a pressure regulator will be placed between the fuel pump and the carburetor. 
The regulator is controlled by the turbo pressure more or less as the waste gate valve on the turbo. When the turbo pressure increases the fuel pressure increase accordingly. The fuel pump will all the time give a higher pressure (and flow) to the regulator than required and the excessive fuel will be returned to the fuel tank. I knew that I would be able to use the extra tank inlet some day!



I am still searching for an intake manifold but will make one if required. Imagine if I had a 3D-printer for metal available - See more under videos on http://www.eriksbikeworld.com/






This is designed for use on a miniature Ducati with a 49 cc engine and should give more than sufficient cooling to the turbo.
In addition I found a small 12V centrifugal pump on Ebay (Hong Kong). Lets hope the quality is good....







The idea is to connect the pump to a timer relee - When I stop the engine the cooling pump will continue to run for 3-5 minutes.
Lets hope it is room for all this on the bike - To be continued
I have also identified a small radiator for the water cooling for the turbo:

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