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Stihl 044/440 exhaust?

Discussion in 'Chainsaw' started by HorseFaller, Nov 17, 2010.

  1. HorseFaller

    HorseFaller ArboristSite Guru

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    Just picked up a 044/440. Its used but relatively stock except a big bore kit. Trying to decide if i should Maxflow/Holeshot the intake or not. Kind of not a fan of the look or the skinned knuckles i get starting my saw, but like the 135cfm. Would like the old style better. Other decision to be made is exhaust power port or just dual port or even triple port is an option. Any suggestions will help.
     
    Last edited: Nov 18, 2010
  2. Outlaw5.0

    Outlaw5.0 ArboristSite Guru

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    Factory dual port cover is all you need. I like to open up the port in the cover a little more though.
     
  3. Tzed250

    Tzed250 Account Hold

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    The stock HD filter will flow more air than than the carb.

    .
     
  4. wigglesworth

    wigglesworth Booned

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    :agree2:

    The MAX flo is a waste of money, IMHO, unless your in some serious dusty conditions, that would require a oiled filter.
     
  5. Trigger-Time

    Trigger-Time Guest

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    :agree2:

    088 and MS880 use same filter, so I would think if it will work for 880 it
    would flow enough air for your BB.



    TT
     
  6. timberwolf

    timberwolf Addicted to ArboristSite

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    Like TT said, same filter works on even ported 066s and 088s. So no way your 044BB is coming anywhere near the limits of the filter.

    I did put one on a flow bench at one point, cant remember exactly what the result was but it was well over 100 CFM. 044BB at best would not be able to draw more than about 30 CFM.
     
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  7. blsnelling

    blsnelling Site Sponsor

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    On top of that, they're butt ugly and cheap looking. Of course some say the same thing about my 066 with it's K&N:clap:
     
  8. blsnelling

    blsnelling Site Sponsor

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    Bump for an old thread about air filter capacity.
     
  9. sgrizz

    sgrizz ArboristSite Guru

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    We need some more air filter threads cause oil threads are getting out of hand .:clap:
     
  10. Deets066

    Deets066 Firewood hack

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    Every saw I put a maxflo on needs to be richend up, so they must suck more air than stock.
     
  11. Moparmyway

    Moparmyway Addicted to ArboristSite

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    They most certainly do allow more air !
    I had to richen up everything I put them on too, including my ported 044.
    You could also feel the difference in the cut while running the MaxFlow.
     
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  12. MustangMike

    MustangMike Addicted to ArboristSite

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    I read these things and I see some confusion about the "capacity" of a filter vs the "restriction". I think talking about capacity is not relevant, as it will depend on the pressure exerted.

    Any filter that reduces the restriction of air flow will increase throttle response and the saw's power.

    I know the K&N and HD-2 made a noticeable difference when I put them on my 044. I prefer the HD-2 over the K&N because of the difficulty cleaning the K&N.

    I believe Chad's dyno testing said that the HD-2 and Max Flow produced the same power. The Max Flow has more capacity before it needs to be cleaned, but takes up more space, so you decide.

    I believe the dyno also resulted in large gains from removing the filter, which is not an option for in field conditions.

    At $30.- from my local dealer, I am very happy with them.
     
  13. Moparmyway

    Moparmyway Addicted to ArboristSite

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    IIRC, Chad did NOT re-tune the saw with those changes in air filters.
    IMHO, once you run a MaxFlow, its hard to run anything else
     
  14. SAWMIKAZE

    SAWMIKAZE Addicted to ArboristSite

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    Im a max flow fan.
     
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  15. MustangMike

    MustangMike Addicted to ArboristSite

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    First, I have heard nothing but good things about the Max Flow, so I am certainly not knocking them, the only downside being the addl bulk.

    However, did you test a Max Flow compared to an HD-2 and see an increase? Even w/o re-tuning (or should I say especially w/o re-tuning) if it is less restrictive the dyno should have reflected an increase in power. I don't think he re-tuned it w/o a filter either, but power increased. Leaning the saw out should do that.

    I just like the smaller footprint, my preference.
     
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  16. Deets066

    Deets066 Firewood hack

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    I took the hd2 off because of the fines that get packed in it.

    I still had to re-tune goin from hd2 to maxflo on the 066
     
  17. SAWMIKAZE

    SAWMIKAZE Addicted to ArboristSite

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    I run mine without the cover.
     
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  18. Deets066

    Deets066 Firewood hack

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  19. SAWMIKAZE

    SAWMIKAZE Addicted to ArboristSite

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  20. blsnelling

    blsnelling Site Sponsor

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    Failing to re-tune after any change makes the result null and void. Lean it out with the HD2 and it'll make more power too.
     
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