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  • Ramon
    Ramon replied to the thread Nalon Viper 2.5cc CI Engine.
    Excellent link Ken, I do climb mill to eliminate burs but it does look like I've been doing it wrong for too long🙄 Not quite so sure...
  • Ramon
    Ramon replied to the thread Nalon Viper 2.5cc CI Engine.
    This might be of use to others Pat so repeating it here. Hi Pat - just come in for a coffee! Make the ring first, say .5 mm larger...
  • Ramon
    Ramon replied to the thread Nalon Viper 2.5cc CI Engine.
    Morning Patrick, now off for a day in the garden for a change but before I go ........ The mandrel wants to fit the rear bearing...
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  • Ramon
    Ramon replied to the thread Nalon Viper 2.5cc CI Engine.
    Well it's not as bad as you might think Patrick and yes you can learn from it - not only the mistake but how to rectify it. Fit the...
  • Ramon
    Ramon replied to the thread Nalon Viper 2.5cc CI Engine.
    Good progress Patrick but if you get the front and rear bearing in line concentrically and parallel with each other on a four jaw set up...
  • Ramon
    Ramon replied to the thread Nalon Viper 2.5cc CI Engine.
    Andrew A link to the book (disc) designs for free down load are actually on here courtesy of Ken Croft, one of the engine boys. A...
  • Ramon
    Ramon replied to the thread Nalon Viper 2.5cc CI Engine.
    Agreed - if you are making your own the expanding area needs only to be sufficient to provide the grip. The rest of the mandrel should...
  • Ramon
    Ramon replied to the thread Nalon Viper 2.5cc CI Engine.
    Hello Peterha I always cut the slits with a standard hacksaw (or a junior one if very small - I have made them as small as 1/8 diameter...
  • Ramon
    Ramon replied to the thread Nalon Viper 2.5cc CI Engine.
    Hello Patrick, In answer ..... 1, Yes best if done with a 45* cutter having gashed the slot with an endmill to relieve the bottom. Do...
  • Ramon
    Ramon replied to the thread Nalon Viper 2.5cc CI Engine.
    Hi Pat, I'm not keen on using a block to hold in the four jaw for a couple of reasons. Even with careful set up there is no 'absolute...
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  • Ramon
    Ramon replied to the thread Nalon Viper 2.5cc CI Engine.
    Hi Patrick, Yes good to see you back on this again. Re the mandrel. You will get a far better grip if you put four cuts in rather than...
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  • Ramon
    Ramon replied to the thread Back Spot Facing Tool.
    Hello Mark - I remember it well - work that is, and how it could get in the way of more 'important' things ;) If you made your cutter...
  • Ramon
    Ramon replied to the thread Back Spot Facing Tool.
    Mark - I have made the McOnie but didn't spotface the cylinder bolt holes - used studs instead. Here's a reverse spotfacer made...
  • Ramon
    Ramon replied to the thread Nalon Viper 2.5cc CI Engine.
    A good start Patrick 👍 Given that you are making two a drill jig that could fit both case bore and front and back housings would be a...
  • Ramon
    Well I did say I was a dynasaw :) I'm speaking from a home workshop point of view based on working experience with non CNC machines...
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