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In need of 288xp porting tips

Discussion in 'Saw Building 101' started by Yotaismygame, Feb 21, 2019.

  1. Yotaismygame

    Yotaismygame Juiced Saws #GetJuiced

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    I'm about to start a full rebuild on a 288xp and I'm having trouble finding solid info on what porting really works on this saw. At the moment I'm thinking, cut the base and squish band, or make a pop up, plus some port work. How about the timing? Does this saw respond well to a timing advance? I'm not looking to make the most powerful saw ever, but a strong saw is the goal.

    I don't expect full on instructions but some tips and pointers are greatly appreciated.

    -Ian
     
  2. BGE541

    BGE541 Addicted to ArboristSite

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    No timing advance as it can make hard hot starts, cut base and squishband leave piston OEM for ease of replacement if need be.
     
  3. Yotaismygame

    Yotaismygame Juiced Saws #GetJuiced

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    I got her done a about a week ago. It’s posted in a few different spots on both forums. At least someone eventually replied. So thanks for that. Few guys from the other forum helped me out.
     
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  4. BGE541

    BGE541 Addicted to ArboristSite

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    I try and bounce back and forth between here and O .... P.... E....

    How did it turn out?
     
  5. Yotaismygame

    Yotaismygame Juiced Saws #GetJuiced

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  6. Huskybill

    Huskybill Addicted to ArboristSite

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    I advance the timing on the (example) 2100’s the width of the scribed line we line up when its timed. It still starts easy. Just a little advanced to help out the advanced port timing. On the other ignitions with no markings I scribe a line from the crankcase to the ignition when I can. On some I file slots in the mounting holes to advance it. Just to squeeze a tad more out of it.
     
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  7. Yotaismygame

    Yotaismygame Juiced Saws #GetJuiced

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    Without a doubt a small timing advance really woke this saw up.
     
  8. Huskybill

    Huskybill Addicted to ArboristSite

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    Up it does. And still easy to start. I found this out decades ago on the late 70’s Husqvarna dirtbikes. I ported every engine a tad more. The last bike I did all the changes plus advance the timing. The bike would fly.

    Did you go to a bigger carb? I been wondering which carb would upgrade my 262 I’m porting.
    I wonder if a 181/288 carb would interchange?
     
  9. Yotaismygame

    Yotaismygame Juiced Saws #GetJuiced

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    I didn’t. Just a base/band cut, port shaping and adjusting and advanced the timing. All the usual work saw porting type stuff. I ran it first with stock timing and my initial feeling was the saw is strong but I wasn’t blown away or anything. Went back and advanced the timing and was very happy with it. No weird starting problems or anything.
     
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