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Tech marches on thanks to the metallurgists

Discussion in 'The Pub' started by ruckusman, Jan 9, 2017.

  1. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

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  2. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    Been around for a long time and many businesses offer Nikasil services. You have to be able to get plain top rings though because you cannot run chrome on Nikasil.
    Have a look at the Ricardo technical documents for great info on friction and a million other things.
     
  3. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

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    AAH but it's NOT Nikasil or any coating per se - it's hypereutectic aluminium bores with an interesting honing process...It's not new however the process is very well described in the link page
     
  4. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    50 lashes for me for failing to pay attention :D
     
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  5. Frankster

    Frankster Grey Pride...Adventure before Dementia Staff Member Premium Member Ride and Events Crew

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    Quick question while we're talking about bores and honing etc...

    After putting an engine back together (new rings, honed bores etc) should you run it in or can you just rev the crap out of it? I'm curious to know what engine rebuilders do as I've heard different stories about what is recommended.
     
  6. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    My thoughts on this are in my thread on the topic. Give it the beans.
     
  7. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Yep, give it the beans accelerating, but also let the engine decelerate on its own a few times. I'd drop the oil & filter after the first run in just for extra peace of mind
     
  8. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

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    If I asked your Missus to give you that spanking it might just be fulfilling your cunning plan, so I'm going to forgive you this one time :D
     
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  9. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

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    Here you @Frankster
    http://2fiftycc.com/index.php?threads/hone-fit-new-rings.2939/
     
  10. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

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    I agree with giving it the bean... just don't load it under light throttle... keep it going up and down the rev range... no constant throttle...
    What kills a new engine is people being too gentle through the gears and then leaving it in a high gear and putting it under load...
    Ride it like you Stole it...:)
     
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  11. Frankster

    Frankster Grey Pride...Adventure before Dementia Staff Member Premium Member Ride and Events Crew

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    Thanks for all the feedback folks. I did read Blair's thread when he first posted it and found the details/information worthwhile. The reason I asked the question in the first place is because I'm looking to build my first engine specifically for drag racing, so once it's all back together "running it in" will consist of 19,000rpm in all gears. I guess real engine builders put there engines on a dyno and run them in under load in that environment. I don't have a dyno (yet) so don't have that luxury and running the bike up and down the street might piss the neighbours off and it's dangerous too.
     
  12. flea

    flea Well-Known Member Premium Member Contributing Member

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    could always buy / build a rolling road ,cheaper than a dyno (though would really like a dyno )
     
  13. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

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  14. Frankster

    Frankster Grey Pride...Adventure before Dementia Staff Member Premium Member Ride and Events Crew

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    Wow...that home dyno is way cool. He wrote his own software too!
     
  15. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

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    I've often thought of making something to use to load a bike engine after a rebuild, something like a car hub with the disc brake and tyre attached running up against the rear wheel. Using a pedal to push a trailer type of master cylinder to put pressure onto the brake to create drag and therefore load to the bike engine. Would need to spray water onto the disc to extend the time I could use it before the disc got too hot. Just a thought. :D
     
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  16. flea

    flea Well-Known Member Premium Member Contributing Member

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    bloke I know in mackay whose family does drag racing have their own rolling rd for testing ,forget how they set it up but he said they had a adjustable resistence on it to load it up (all homemade)
     
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