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Thread: ESE's works engine tuner

  1. #1831
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    Quote Originally Posted by TZ350 View Post
    .

    This is my favourite

    Avalon at the BOB,
    .
    Ian Dawson has what must be the best ever photo of her in a facebook album
    http://www.facebook.com/#/photo.php?...&id=1622289254
    "If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough power."


    Quote Originally Posted by scracha View Post
    Even BP would shy away from cleaning up a sidecar oil spill.
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    Send Lawyers, guns and money, the shit has hit the fan

  2. #1832
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    Ouch

    10 chars

  3. #1833
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    Quote Originally Posted by F5 Dave View Post
    aww gee here's one for ya. Real bargain too.
    RS125

    No no, its ok, your constant adoration is thanks enough
    Hahah, saw that a week or so ago nearly covered the computer in coffe as soon as I saw the price. Funnyist thing I have seen in months

    Quote Originally Posted by Kickaha View Post
    Ian Dawson has what must be the best ever photo of her in a facebook album
    http://www.facebook.com/#/photo.php?...&id=1622289254
    That photo is awsome. Man for all the opurtunities I give people to get pics of me crashing I have nothing that impressive to show

    For the record Qkkid was in my bed, not the other way round

    Quote Originally Posted by Yow Ling View Post
    Pumba is a wise man.

  4. #1834
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    Quote Originally Posted by Kickaha View Post
    Ian Dawson has what must be the best ever photo of her in a facebook album
    http://www.facebook.com/#/photo.php?...&id=1622289254
    she was doing a during race wof inspection (or scrubing in the new fiberglass and paint)
    wanted to see how bright the headlight was

    I think it should fly threw a wof(straight over and out the other side)


    this one looks much safer
    http://www.facebook.com/photo.php?pi...=1256576587504
    "Instructions are just the manufacturers opinion on how to install it" Tim Taylor of "Tool Time"
    “Saying what we think gives us a wider conversational range than saying what we know.” - Cullen Hightower

  5. #1835
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    I see Avalon isn't the only one trying that move
    http://www.fatbaq.com/mainpage.phtml...tions&img_id=7
    "Instructions are just the manufacturers opinion on how to install it" Tim Taylor of "Tool Time"
    “Saying what we think gives us a wider conversational range than saying what we know.” - Cullen Hightower

  6. #1836
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    Facebook!?!! Bunch of Gurls!

    Post it in a Man's format. Bloody floral print pansies.
    Don't you look at my accountant.
    He's the only one I've got.

  7. #1837
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    Quote Originally Posted by F5 Dave View Post
    Facebook!?!! Bunch of Gurls!

    Post it in a Man's format. Bloody floral print pansies.
    what forgotten your login again
    "Instructions are just the manufacturers opinion on how to install it" Tim Taylor of "Tool Time"
    “Saying what we think gives us a wider conversational range than saying what we know.” - Cullen Hightower

  8. #1838
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    How do you start a Poll?

    Does anyone else think that we should run a sweep stake on the outcome of TeeZee's plenum chamber idea.

    I hear he is pretty close, maybe only days away from being able to try it out.

  9. #1839
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    good idea bucketracer

  10. #1840
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    .

    Thomas and Alexi putting the finishing touches to the plenum and fitting a blow off plate.

    Next week, hope to get the motor into the bike for a run up the drive, then off to the dyno.

    .
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  11. #1841
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    Love the blow off valve (but dose it go wosh)
    bet all the boy racers will want one now
    "Instructions are just the manufacturers opinion on how to install it" Tim Taylor of "Tool Time"
    “Saying what we think gives us a wider conversational range than saying what we know.” - Cullen Hightower

  12. #1842
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    Love the blow off valve (but dose it go wosh)
    bet all the boy racers will want one now
    "Instructions are just the manufacturers opinion on how to install it" Tim Taylor of "Tool Time"
    “Saying what we think gives us a wider conversational range than saying what we know.” - Cullen Hightower

  13. #1843
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    Plenums and Induction Systems:- http://hemrickperformance.com/induction.aspx

  14. #1844
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    An excerpt from:- http://autospeed.com/cms/title_Breat...1/article.html

    "The gains available form a well-tuned intake system should not be underestimated. Pioneering work done by Jaguar on their mechanically injected racing engines showed that it was possible to gain more than 100 per cent volumetric efficiencies (VE) by using very long intake runners. This means that the cylinders actually breathed in more than their swept volume! Many manufacturers have since developed efficient tuned intake systems that give very high volumetric efficiencies. As an example, Ford in Australia developed a superb dual-length intake manifold for their straight six, a system that achieves a VE of 100 per cent at the peak torque rpm of 3000.

    Power and torque gains of up to 20 per cent have been seen in some engines - and that's as much as is achieved by low-boost turbocharging!

    A starting point for working out the length and diameter of intake runners can be gained from the following equations. In a Helmholtz Resonance system (one with runners connected to a common plenum), US-based engineering guru David Vizard suggests that a runner length of 17.8cm at 10,000 rpm makes a good starting point. (In this context, "runner length" refers to the distance from the inlet valve to the plenum chamber.) Add to this length 4.3cm for each 1000 rpm less that the system is being tuned for. Tuning for peak torque (not peak power) is the norm, and so if the engine were being tuned for 4000 rpm, a runner length of 43.6cm would be required. You can see that for an averagely-sized engine bay, the longer the runner that can be fitted in, the better!
    Click for larger image

    One equation for runner diameter is to multiply the engine volume in litres by the engine's volumetric efficiency, then by the tuned rpm, then divide this sum by 3330. The final figure is square rooted, giving the runner diameter in inches. As an example, a 5 litre engine with an 80 per cent efficiency (expressed as 0.8) and tuned for 3000 rpm, will have a runner diameter of 1.9 inches, or 48 mm.

    The volume of the plenum should be around 80 per cent of the volume of the cylinders to which it is connected."

    I guess you half the length for a 2-Stroke but use the same runner diameter and it looks like TeeZee's 1.5l plenum could be to big.
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  15. #1845
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    Found anything specific to a Two stroke there Bucketracer?

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