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  1. C

    First 4 Stroke First V twin.

    Well, Apparently it was stupid of me to order plans from Modelltechnik-Jung. Funny thing is Its the first engine I have made that started rather easily. I expected a big struggle to even start it. It took me 4 Two stroke engines before I got one to run and this was my first 4 stroke and it...
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    First 4 Stroke First V twin.

    Hi Mechanicboy. Ok I think I see your point. I did ask the designer for comment but have not received a response yet. So if I set the working angle to 125 degrees , the nose radius calculates to around 1.9 mm and the cam shape changes as seen in the diagram below. So the valves will stay open...
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    First 4 Stroke First V twin.

    Hi, I'm just a novice I used an excel workbook that someone created and fed it values and it came up with a milling table. This is the first page of the workbook all values converted to inch's from the values from the plans. I thought it gave enough values to do the calculations. Base Radius 4.4...
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    First 4 Stroke First V twin.

    Hi, I plugged the values given in the drawing into a excel chart that gave values for cutting on a mill with rotary table. Cuts every 3 Degrees , 120cuts per Cam. I did see the above movie but didn't quite understand it so I used the Method below following the cutting parameters calculated by...
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    First 4 Stroke First V twin.

    HI, I don't really understand all the cam timing stuff I only went by the drawings where it states the following of the cam lobes in relation to each other. Exhaust Cam Cylinder 1 0 Degrees, Inlet Cam Cylinder 1 114 Degrees Exhaust cam Cylinder 2 135 Degrees, Inlet Cam Cylinder 2 249...
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    First 4 Stroke First V twin.

    I adjusted the tappets and fiddled with the mixture and locked the throttle at half open. In this video the engine runs after removing glow leads until I had to stop it as a mounting bolt was coming loose. Some observations. It seemed as if it was running on one cylinder only since I could see...
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    First 4 Stroke First V twin.

    Thanks Steamchick, I already had a fitting to connect a dial gauge to the glow plug hole to find top dead centre so I could do the valve timing. however I would not have an idea of what a pressure gauge should read as good compression. The design does not say what the compression should be.
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    First 4 Stroke First V twin.

    i was thinking about that. When I was attempting to start it for the first time , while it was cranking and not firing I quickly covered the carby intake with my finger for a second or less and it would fire. Started to make it richer bit by bit, so I will continue to do that . The fuel is...
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    First 4 Stroke First V twin.

    Got it running. Any body got any tuning tips?
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    First 4 Stroke First V twin.

    Better Bends Cylinder head Completed model. I haven't run it yet I didn't have a setup to run two glow plugs at once so have to work on that now. The OS carb is from an Engine I purchased 40 years ago. That engine still runs, well it did when it had the carby.
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    First 4 Stroke First V twin.

    Hi Started building V Twin 4 Stroke 35CC Engine from Plans from Germany. This is the same model Ghosty has built. Started with Crankcase In December Last year 2021. Built various pieces in an order I thought was appropriate for my skill level. The next images in in a bit of a random order...
  12. C

    Coaxial Centering indicator VS wobbler

    Thanks Charlie. I have instructions with the device much the same as those you posted and I did remove the plastic ring. As suggested by others here I also trammed the mill again. I was comparing the wiggler , the Co-axial indicator and a norga style arm with standard DTI. The wiggler and the...
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    Coaxial Centering indicator VS wobbler

    Hi, I seem to be having difficulty with my new Axial Centering dial indicator as pictured below, VS a wobbler also below. It seems to me that I get different results finding the center of a hole between the two devices and it appears the the wobbler is more accurate. I say this because when...
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    35cc "V" Twin

    RS components have the belt 144 teeth. Is this not it? https://au.rs-online.com/web/p/timing-belts/1821316/
  15. C

    35cc "V" Twin

    I found some here https://www.ptparts.com.au/products/category/UIKUFRHV-3mm-htd-series-timing-pulleys
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