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porting a husky 350...

Discussion in 'Chainsaw' started by Mattyo, Sep 6, 2014.

  1. Mattyo

    Mattyo Youtube Speciawist

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    no port timing... just squared off the intake and exhaust a bit... and ground on the base of the cyl for better flow....
     
  2. old-cat

    old-cat Fir Man

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    I think there are more "guides" than what you seem to be aware of.
     
  3. Mattyo

    Mattyo Youtube Speciawist

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    when I first started doing this, I did a search for pics of "ported" base adapters... there isn't much. certainly, for basic cylinder porting principles, i'm sure there are tons, but skill wise I'm not there yet. if I graduate to a 372xp then i'll get a guide out and likely bring the cylinder to the dental office and use my nice handpieces :)
     
  4. Mattyo

    Mattyo Youtube Speciawist

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  5. Mattyo

    Mattyo Youtube Speciawist

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    Incidentally, if anyone wants to know the thickness of the base adapter.. its 1.335" ... roughly. Measured a 2nd one... 1.334" .... 20141128_124149[1].jpg
     
  6. drf255

    drf255 BAD CAD

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    Bringing this thread back.

    Was this the freaky 350 you brought to the CT GTG?

    Any other mods made? Timing retarded back to stock? Degreed cylinder? Play with upper transfers at all?
     
  7. Mattyo

    Mattyo Youtube Speciawist

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    Honestly at this point I don't remember I'm pretty sure I left the timing advance but I don't remember that either I'm pretty sure I did end up taking this one into the dental office to work on the transfer is a bit but I would assume that the port timings were nothing fancy probably somewhere around 105 1 25 + 78
     
  8. Mattyo

    Mattyo Youtube Speciawist

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    Maybe one day I'll check and see what I did lol!
     
  9. drf255

    drf255 BAD CAD

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    It's a great recipe. If you find the time, you should check.

    The way that saw runs, wow.
     
  10. Derf

    Derf Addicted to ArboristSite

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    I ran this saw and we were all very impressed with it.
     
  11. David Young

    David Young ArboristSite Guru

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    does it have a 353 top or 346?
     
  12. smokey7

    smokey7 jack of a lot ace of a few

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    Is the eluding me. I don't see it.
     
  13. Mattyo

    Mattyo Youtube Speciawist

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    Hyway 45mm quad port top end...found on ebay
     
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  14. Mattyo

    Mattyo Youtube Speciawist

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    The pics above are the 3r sports ebay 346xp clone cylinder...44.3mm
     
  15. Huskybill

    Huskybill Addicted to ArboristSite

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    Porting, I move the exhaust port up, the exhaust opens sooner, the intake down so it draws in fresh gas sooner. I advance the timing a tad so it matches the advanced timing on the ports. Otherwise it’s too retarded, sluggish. Tuning is part of porting.
     
  16. blsnelling

    blsnelling Site Contributor

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    I have found the 346 to like a low exhaust, no higher than 105, and no more than 78-80 on the intake. I do not advance the timing on them.
     
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  17. huskihl

    huskihl Addicted to ArboristSite

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    I like 109 lol
     
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  18. smokey7

    smokey7 jack of a lot ace of a few

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    105 125 78 primary flat secondarys toward the chamber or edge of chamber. Depends on the jugs timing and port shape to begin with. I have a very rev happy 350 with a kafar kit that I went nuts with. Took exhaust up to 98 trans at 125 and intake at 82. Loves to rev but power band is way high and narrow. Great limb setup.
     
  19. Huskybill

    Huskybill Addicted to ArboristSite

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    I have two 346 Xp to play with maybe one will hit the bench soon.
     
  20. blsnelling

    blsnelling Site Contributor

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    I tried porting one with higher exhaust. Instead of making more RPMs, it made less. It ran OK but not near are as strong as if left low.
     

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