head inserts in original KR1-head
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- JanBros
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you can downgrade that one.TwoStroke Institute wrote:Nice work Jan, I'll give you 9/10
apparently the holes on the left (off the picture) are not in the middle.
http://i54.tinypic.com/nbyemq.jpg
thought it was a fabrication error (less material on one side of the plu-hole) , but apparently it's mine
My ultimate goal is to die young as late as possible !
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GOOD JOB - nice work
the IDEAL I.C. engine would run at flame/combustion temperature
that way there would be no heat differential that would suck heat power from the expanding combustion process
of course not possible with common materials (and pre-ignition without direct injection)
in the real world most of the engine has to run at much lower temperatures (with losses to cooling and atmosphere)...
the benefit of efficient cooling is that incoming air stays cooler/denser for as long as possible
... to summarise if you run the chamber cold it sinks heat to the cooling system removing power obtained from combustion (less work done on piston)
as answered - neither the race teams (app) or VHM do, so NO is the answerJanBros wrote:anybody know if it's a good idea to make some sort of grooves at the back to increase the surface for better cooling ? or will it disturb the waterflow too much ?
the IDEAL I.C. engine would run at flame/combustion temperature
that way there would be no heat differential that would suck heat power from the expanding combustion process
of course not possible with common materials (and pre-ignition without direct injection)
in the real world most of the engine has to run at much lower temperatures (with losses to cooling and atmosphere)...
the benefit of efficient cooling is that incoming air stays cooler/denser for as long as possible
... to summarise if you run the chamber cold it sinks heat to the cooling system removing power obtained from combustion (less work done on piston)
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If I may say so myself : starting to look really good
added a stop to prevent the insert from spinning when tightning the spark plug. may not look "professionel", but does the trick.
might consider it, but it's very time-consuming , can't do it for free ...
added a stop to prevent the insert from spinning when tightning the spark plug. may not look "professionel", but does the trick.
500bernie wrote:Great work Jan
You will have to let us all know when you are going into production, so we can all get our not so good heads fitted with inserts
might consider it, but it's very time-consuming , can't do it for free ...
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- JanBros
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did a flip horrible job the last days : O-ringing the outside of the head. it's like that red drawing game from the 80's (?) where you have a knob for horizontal and one for vertical lines. Same way I had to do this on my mill
and because the used mill (2 mm) is so small I couldn't cut it in one time, had to go 3 times round for the needed dept per head
next : sealing the KIPS-valves.
and because the used mill (2 mm) is so small I couldn't cut it in one time, had to go 3 times round for the needed dept per head
next : sealing the KIPS-valves.
My ultimate goal is to die young as late as possible !
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Hi Jan,JanBros wrote:did a flip horrible job the last days : O-ringing the outside of the head. it's like that red drawing game from the 80's (?) where you have a knob for horizontal and one for vertical lines.
Etch a Sketch
Nothing that is quality comes cheap, I am sure there are plenty of members that do not have the skill to do what you can do , but would be prepared to pay for it
Cheers,
Bernie
Firecracker Red and Grey C3 300
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sorry Jan, don't have any dimensions. I was thinking from the point of view that VHM inserts are off the shelf for a number of models, therefore, if possible, may only require half the machining. Outstanding work by the way, good to see the resourceful KR spirit alive and kicking which is sadly lacking on many other forums