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Thread: Turbo performance?

  1. #16
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    Yes, I understand superchargers. I still mean a turbo, but it drives the engine, not the engine driving a supercharger.
    http://en.wikipedia.org/wiki/Turbo-compound_engine

  2. #17
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    Hot air isn't as good as cool air, which is why inter-coolers are used.

    As the air is "compressed" it gets hotter and expands, and will have less mass than colder air of the same volume (volume of the piston swept volume is the important part).

    The fuel air ratio for burning gas optimally is for all intents constant (not true but for this you can take it to be).

    So cooler air for same swept volume, will have more mass, and hence more oxygen, for which you need more gogo juice = bigger bang!
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  3. #18
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    I just like the noise the pull-off valve makes. Can I install one on my V Strom? Pfffishhhhh!
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  4. #19
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    Quote Originally Posted by quickbuck View Post
    True that.
    The Bell 47 uses a VERY large Turbo... and it spins at over 40000 RPM.
    100000 isn't too far fetched for some of the smaller turbos out there.
    100,000rpm is nothing for a turbocharger, the small-ish turbo's that sit on V6 Mitsi motors can go past 250,000rpm!
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  5. #20
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    Quote Originally Posted by Laava View Post
    I just like the noise the pull-off valve makes. Can I install one on my V Strom? Pfffishhhhh!
    Just let all the air out of your tyres haha. Or always carry an air tank on the pillion and rig up the release valve to the clutch lever.

  6. #21
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    Quote Originally Posted by Monsterbishi View Post
    100,000rpm is nothing for a turbocharger, the small-ish turbo's that sit on V6 Mitsi motors can go past 250,000rpm!
    Yes, there are those too.... It is amazingly fast when you think about it.

  7. #22
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    Screw using the turbo to blow air into the engine, use those revs to power the drive shaft haha Near no torque but imagine the hp

  8. #23
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    Quote Originally Posted by quickbuck View Post
    Yes, there are those too.... It is amazingly fast when you think about it.
    Yup, with a 4cm wheel you're looking at 1872kph on the tips when the shaft is turning 250,000rpm!
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  9. #24
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    You want hot air going through the exhaust side, hot = gas velocity.
    You want to keep the intake charge cool as everyone said.

    There are better benefits in water cooled barrels than cooling the housing (has been done)
    If you're wanting the nicest performance go variable vane (Holset make them and they're not the newest idea either) and make sure the A/R is right for your needs on both ex/intake side.
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  10. #25
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    Quote Originally Posted by Laava View Post
    I just like the noise the pull-off valve makes. Can I install one on my V Strom? Pfffishhhhh!

    Sure can.

    http://www.traskperformance.com/

  11. #26
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    Quote Originally Posted by haydes55 View Post
    Screw using the turbo to blow air into the engine, use those revs to power the drive shaft haha Near no torque but imagine the hp
    I think you will find the HP to be quite low..........HP = watts = energy.......in this case waste energy (i.e. energy not being used to more the motor parts around).
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  12. #27
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    Wow some people really need to read up on how turbos work.
    And yes, it isnt just the kinetic energy of the exhaust gases, the thermal energy also contributes to the turbo's usage.

  13. #28
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    Quote Originally Posted by haydes55 View Post
    Screw using the turbo to blow air into the engine, use those revs to power the drive shaft haha Near no torque but imagine the hp
    If you connected anything else to the turbo shaft ... all you would have is another silencer in your exaust system.

    And a dog of a bike.
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  14. #29
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    Quote Originally Posted by Laava View Post
    I just like the noise the pull-off valve makes. Can I install one on my V Strom? Pfffishhhhh!
    I was gutted when I found out my XN85 didn't have one.





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  15. #30
    Quote Originally Posted by baffa View Post
    Wow some people really need to read up on how turbos work.
    And yes, it isnt just the kinetic energy of the exhaust gases, the thermal energy also contributes to the turbo's usage.
    Yes, the waste energy is in the form of heat, it's the heat that wasn't used to push the piston down...or what went into the cooling system or over coming friction. Blowing cold air into a turbo isn't going to produce boost, but the waste heat that's still expanding, that will do it.
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