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facthunter

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Everything posted by facthunter

  1. facthunter
    Yes I wouldn't suggest over revving that Motor. Nev
  2. facthunter
    IF you were Interested, you'd have queried Blue Adventures Post, over 3 weeks ago.. Maybe. Nev
  3. facthunter
    EVEN fuel Distribution is the Prime method of getting efficiency, Injection is a good way of achieving it. . Nev
  4. facthunter
    Premix at Low or closed throttle does not lubricate the Motor adequately. That's well Understood. Going to full throttle is Not a common set up. Nev
  5. facthunter
    Anyone CAN CLAIM anything. A CV carb would ALWAYS have better atomisation across the RANGE. An oversize Slide Carb would be even worse. Hard to tune and little venturi effect.( suction) That type has NEVER been Known for good economy and there's good reasons for that Inherent in the design. Nev
  6. facthunter
    IF the Mix has less fuel there will be Unused Oxygen and that will try to oxidise other things like exhaust valves and also Burn slower, and less reliably. Ie May spit Back.. Nev
  7. facthunter
    Not a Lot of GOOD 2 strokes are Premix these days. Oil injection is the go. Adding more Oil Makes the fuel more Viscous and the Jetting Has to be altered. It won't compensate for Altitude either. Premix requires to run all the fuel out to prevent Left over oil thickening in the carbs when the Petrol evaporates. Nev
  8. facthunter
    Not radically different to many other slide Carburettors. Mikuni. Amal etc The only way to use less fuel is LEAN it out and that Melts/Burns holes in 2 stroke Pistons. This type of carburettor usually sets the standard for straight out Power with ONE per cylinder The difficulty providing richer Mixture when accelerating. Usually done by a well around the Needle Jet or making a Pumper version on some flat slide designs Parlticularly Snapping open a slide carb can usually Kill the Motor IF done quickly enough. Nev
  9. facthunter
    Have an adjustable shut off valve in the middle. Nev
  10. facthunter
    I' m just correcting a couple of errors. Nev
  11. facthunter
    No Pilot with a Skerik of sensitivity would regard THAT as FUNNY.. Nev
  12. facthunter
    Skip, Kyle More than JUST Claimed it. He gave you fullsome reasons why. Turb It's STATIC or DYNAMIC. Dynamic required for things with significant width/length. Knife edges are fine for static work. Nev
  13. facthunter
    Getting back to the drain Valves. I don't like relying on a spring OR an "O" ring. The drain VALVE(s) should all be located in the Lowest parts of the section they drain from and would frequently be in contact with water making steel unsuitable for the seating Parts, long term. Nev
  14. facthunter
    Biting off More than it can chew. Likely to scare the Little ones and give them bad dreams and not want to fly. Nev
  15. facthunter
    The shortest sentence in the Bible. I didn't finish it either as someone told me how it ended. Nev
  16. facthunter
    Most of My comments can easily be confirmed IF people do the research which they Can't be bothered doing because their Mind is already made up . I reserve the right to critique ANYTHING and I don't tell LIES either or Make stuff up. Unfortunately there's a Lot of absolute Crap about on line but with a bit of Honest and skilful effort you will get info you can rely on. My criticism if some aspects would stand assessment by engineers and I'm sure Rotax are aware of it too. They Have upgraded a few things as a result. Press fits and Case strength. Nev
  17. facthunter
    Kyle, IF I even slightly suggest a Rotax is not PERFECT, I get Howled down Mercilessly, no matter what facts I bring up. Most of us who have experience KNOW that NO machine is Perfect. I was Pretty good Mates with Bert Flood some time ago and he didn't say they were Fault free. I've been building, reconditioning Balancing and Modifying engines all my life Pretty successfully If I may say so judging on Performance and lack of failures Your work is quality and well based. Keep up the good work. Nev
  18. facthunter
    Jesus Wept. Nev
  19. facthunter
    IF you machine all surfaces of a part accurately IT can be balanced already. IF it shakes it would be an alignment issue in most cases. Don't ignore any new vibration. Nev
  20. facthunter
    Remove and have a Plug or cork ready and clean and Lap it, then put it back in. Do you Filter your fuel or is there any sediment showing in your drain sample. Nev.
  21. facthunter
    I usually just give them a few twists each way while holding them DOWN if they are the Item I'm thinking of. Nev
  22. facthunter
    I didn't see that .Many exhaust AND some Inlet systems have a slide joint with packers but they can All Leak. The increase in the volume creates the Mixture issue. I wonder if anyone has checked the engine in a quick response situation. The standard set Up seems to be satisfactory. Nev
  23. facthunter
    Still needs restrictors to stop the Pulses. Please explain How a substantial FIXED Length pipe doesn't get stressed when the Engine changes temperature and why the Response to a rapid Power increase say when going around, would not be More compromised .Mixture wise. A plenum between the throttle and the Intake valve is never a good thing. Nev
  24. facthunter
    That will stir Skippy UP. Nev
  25. facthunter
    A U tube connected to both sides would do that or a simple flow indicator that works in both directions. The thing you need is for the settings to remain where they are when set. Nev
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