V-twin engine from scratch - yet another interpretation of how (not) to build a

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sorveltaja:
Cams after smoothing and some polishing:

At this stage, they are ready to roll :wave:.

But before that, cam housing needs the holes for tappets drilled first. And maybe tapped for M4, as I did on the test engine.

sorveltaja:

--- Quote from: madjackghengis on April 01, 2010, 10:12:08 AM ---Well Sorveltaja, it looks like you figured out the cams all right, they look like they ought to work, and that puts you another big step closer to hearing this thing fire up. Looking forward to the video, and seeing it run. Good work!! :beer: Mad Jack

--- End quote ---

Mad jack, I hope so also :thumbup:.

Starting of tappet guides :

There wasn't enough room to make an M4 threads, as the cams are so close together. Instead they are made of 3mm(0.118") od, 2mm(0.078") id straight brass tube.

Valve push rods are to be made of 2mm stainless, so I'm going make tappets thicker than that, say 2.5-2.6mm. Tappet guides also need to be drilled to corresponding size.

That clear plexiglass piece was made at the beginning of this project. I use it as a guide, when angled drilling/milling is required.

Next things to do: tappet guide holes drilling, tappets, and push rods.

After that, the most, if not all major parts, should be ready for assembling, and maybe testing, how they fit together :nrocks:.

sorveltaja:
After some minor fixes, first connecting rod is ready:

Tappets are just simple T-shaped ones, that have 2mm(0.078") concaves for con rods, machined with ball-nose cutter. Valve adjusting screws have also same size concave.

Con rods will have spherical surfaces at both ends. They need to be made one by one, as they all have different length.

One thing, that I was aware already, when making sketches, was quite big angle of left side con rods:

Don't know if that's an issue in the future, but if it is, modification is on the order :dremel:.

But in any case, when con rods are made, valve lapping takes place. Then the springs can be fitted, and whole valves/springs combo can be installed.

dsquire:
sorveltaja

It looks like it is coming along nicely, one piece at a time. Soon you will have it all fitted together and time to fire it up. I know that I am not alone when I say that we are watching in anticipation of that day. Thanks for showing us what you have done to date. :ddb: :ddb:

Cheers :beer:

Don

Stilldrillin:

--- Quote from: dsquire on April 03, 2010, 04:16:24 PM ---sorveltaja

It looks like it is coming along nicely, one piece at a time. Soon you will have it all fitted together and time to fire it up. I know that I am not alone when I say that we are watching in anticipation of that day. Thanks for showing us what you have done to date. :ddb: :ddb:

Cheers :beer:

Don

--- End quote ---

You`re certainly not alone Don! :wave:

Watching, quietly waiting, enjoying.........

Thanks Sorveltja! :thumbup:

David D

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