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Thread: ESE's works engine tuner

  1. #11596
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    Quote Originally Posted by RomeuPT View Post
    If the T port likes opening dead flat and the two aux's port likes staggered, I wonder what would an W exhaust port likes....
    Putting three cooling fins inside the exhaust duct; what a Wonderful idea. That must be what the W stands for, innit?
    Normal port bridges can at least convey the heat to the surrounding metal at both ends; these one-ended W-fins really are the worst you can think of.

  2. #11597
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    Quote Originally Posted by F5 Dave View Post
    Eating rings for breakfast?
    They are pretty reliable, they only eat rings when the tuner has the bright idea of removing some width/thickness from them, and then the hot exhaust gas make the nicasil coating to flake and the rings dont really like that nice soft alumium liner at all.

    I gets a bit worse, because allmost all the cylinders that have those W shapped exhaust ports don't have cooling all around the exhaust port, only on top and part of the sides, the lower tooth as very marginal cooling.

    I don't know if I already said, but thanks Wobbly for the pressure values

  3. #11598
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    Quote Originally Posted by Frits Overmars View Post
    All other things being equal, more horsepower goes together with more exhaust gas energy. But the connection is not linear and all other things are never equal.
    Exhaust gas energy is mainly effected by squish, ignition timing, flame speed and compression ratio. And as I tried to explain before, you can overdo it with diffusor and reflector angles; there is no maximum but there is an optimum.
    Can we create a rule of thumb for the optimum belly diameter / exhaust volume/cc ratio a pipe should have?

  4. #11599
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    Quote Originally Posted by RomeuPT View Post
    Can we create a rule of thumb for the optimum belly diameter / exhaust volume/cc ratio a pipe should have?
    It is included in my 'FOS exhaust concept'.

  5. #11600
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    Quote Originally Posted by senso View Post
    . . . .he nicasil coating to flake and the rings dont really like that nice soft alumium liner at all.. . .
    Sorry I was being a bit silly.

    and to continue that theme; I think the rings would love the bare ally, they'd gobble it up in no time.
    Don't you look at my accountant.
    He's the only one I've got.

  6. #11601
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    I understood, we can't be serious all the times.

  7. #11602
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    Quote Originally Posted by Frits Overmars View Post
    It is included in my 'FOS exhaust concept'.
    Sure, it is....Thanks

  8. #11603
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    Not strictly Bucket legal but does anyone want a Barton Phoenix? one of the guys on the UK sidecar forum is selling this

    I have for sale a Barton Phoenix square four two stroke race engine, it is for re build and is missing one gear shaft/gears but that should not be a problem as there are many people that could make a new part.These engines where used in the Barton 750 race bikes and in the silver dream racer film and of course Nigel Rollason used one to power his sidecar to a win at the TT. How many did Barton make ? no records exist but i am sure it would have been in the low teens at most, Barton sold out to Eric Buell in America and i have seen a dyno sheet showing over 160bhp. I am open to serious offers for the engine. You can have either Barton or Armstrong cylinders.
    Contact racing50chris@aol.com Please not this is a complete engine inc dry clutch and cranks and disc valves/covers etc and just missing a gear shaft and some gears.
    "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.
    Quote Originally Posted by Warren Zevon
    Send Lawyers, guns and money, the shit has hit the fan

  9. #11604
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    Kevin Cameron did an article on Buell back in the day describing his folly of buying the Barton concern & spending countless hours trying to fix the F'ups in the design. That said if one won a TT it must have some pedigree.


    I like his ltd liability approach to marketing "Barton sold out to Eric Buell in America and i have seen a dyno sheet showing over 160bhp"
    Yeah I've seen a dyno sheet for 160hp, it was on a K5 GSXR with a pipe & PC. Or does he mean the Buell ones may have reached 160? Or even perhaps the original. Technically I didn't lie your 'onour.
    Don't you look at my accountant.
    He's the only one I've got.

  10. #11605
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    Quote Originally Posted by Frits Overmars View Post
    Quote Originally Posted by RomeuPT View Post
    Can we create a rule of thumb for the optimum belly diameter / exhaust volume/cc ratio a pipe should have?
    It is included in my 'FOS exhaust concept'.
    Click image for larger version. 

Name:	FOS Expansion Chamber Design.gif 
Views:	234 
Size:	24.5 KB 
ID:	282886

    ........ found it.

  11. #11606
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    Quote Originally Posted by TZ350 View Post

    ........
    Did ya get to read the other link i sent you Rob?
    Quote Originally Posted by Katman View Post
    I reminder distinctly .




    Kinky is using a feather. Perverted is using the whole chicken

  12. #11607
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  13. #11608
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    Quote Originally Posted by TZ350 View Post
    No this one
    Quote Originally Posted by Katman View Post
    I reminder distinctly .




    Kinky is using a feather. Perverted is using the whole chicken

  14. #11609
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    Quote Originally Posted by TZ350 View Post
    Quote Originally Posted by husaberg View Post
    These XLS-files were made by people unknown to me; they apparently based their files on the above drawing of my FOS Exhaust Concept.
    I do not take any responsibility for these files. In the first one I happened to notice that the diameter of the tailpipe restrictor is used for the whole tailpipe, which can hurt the engine. I could not even open the 'No this one'-file.

  15. #11610
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    Quote Originally Posted by Frits Overmars View Post
    These XLS-files were made by people unknown to me; they apparently based their files on the above drawing of my FOS Exhaust Concept.
    I do not take any responsibility for these files. In the first one I happened to notice that the diameter of the tailpipe restrictor is used for the whole tailpipe, which can hurt the engine. I could not even open the 'No this one'-file.




    Try this one?

    That was my fault too many Htts i guess.. The pics seem to have disappeared though............


    I figured that, but it was fun to play with never the less
    Quote Originally Posted by husaberg View Post
    Anyway this is a better one based on a simplified Frits Overmars design.
    Quote Originally Posted by Katman View Post
    I reminder distinctly .




    Kinky is using a feather. Perverted is using the whole chicken

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