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Webster IC Engine build log.

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raynerd:
Hi Nick, yes, it is based on Jan Ridders newest "Universal" vapour carb. The valve is massively simplified, so much so that I think I can give it a good go! I`m just not yet sure how to seat the fuel tank. It`ll be a little bigger OD than Jan's design due to the thicker solid body on mine. I`m strongly considering milling a flat on the bottom and just having it seated directly on the base!!

Chris

raynerd:
Following on from the last pictures ...

I turned the OD of fuel tank / vapour carb down to make a nice looking brass cup :D


The top air intake is two piece. An M10 tapped insert soldered into place to allow filling of the tank and then a screwed insert for the air intake reducing the air intake to an 3mm hole tube. The shoulder of the insert is contoured on the shoulder to allow it to sit nicely on the tank. I couldn`t for the life of me think how to do this and so a friend and fellow madmodder suggested a two piece design, where a washer is used as part of the shoulder and the washer filed and sanded to shape. This worked really well but I would be interested to know how this could be made from 1 piece as per the plans


The fuel/vapour outlet tube was then made...not the best photo but all the parts here are ready for soldering..


My sophisticated soldering setup...the cooker top.


And then all polished up... I`m really pleased with it! I just need to make the main air intake insert and the nut which covers the additional air intake on the threaded outlet, glue on the glass viewing window and put it on a stand and then I`m done. Getting there...!  




I believe I`ll need a one way valve as a must as well, so they will be the next things to make.


sbwhart:
Looking good Chris  :thumbup:

You're machining skills are really coming on.

Stew

NickG:
Nice work Chris, your question about how to mount it made be think straight away (too late for yours), is there any reason you can't have the tank vertical?

dbvandy:
There is no need for a one way valve with the webster.  The intake valve only opes with negative pressure from the cylinder, so, if there is any backfire, it will slam the valve shut and keep it out of the tank.  The only issue I have had with the otto and the vapor carb was timing the intake valve correctly, but that is not an issue with this design.

Looks EXCELLENT!!!!  All the way around.

Doug

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