Author Topic: Where to start a woods port?  (Read 3241 times)

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Offline 05_sprcrw

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Re: Where to start a woods port?
« on: May 24, 2011, 07:46:14 am »
Thanks guys, I have already lowered the jug and have .02" of squish now it has plenty of compression it will support the saws weight and slowly drop down as the piston cycles when I hold the starter chord and let the saw go (with a 28" bar and chain full of fuel and bar oil so fairly heavy).

So I would want to raise the exhaust port the  .034" (thickness of my gasket) and lower the intake the same as well. I thought I read some where that if I left the exhaust port lower like that it would move the power band a little lower and keep more torque in the motor? I definitely want it to have more pull then super speed, I will be using it almost exclusively in hard woods like elm, ash and lots of oak.

I don't want to do too much up front just polish it up and maybe widen the intake and exhaust ports. Would I benefit from opening up the bottom of the tranfers and tapering them to the bottom of the jug? I have read of guys doing this/ suggesting it be done. I am a beginner to porting but I was planning on only using files to do the work so I won't take to much material at any one time. I understand it will be a much slower and tedious process but figured it is safer that way.  So I have no problems setting a fairly ambitious but safe goal for me to port this cylinder.   I will definitely do a muffler mod, and match the exhaust opening to the ported cylinder, do I need to do that with the intake as well?

 

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