Author Topic: Dual Port Muffler Experiments  (Read 1537 times)

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Offline KilliansRedLeo

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Re: Dual Port Muffler Experiments
« Reply #10 on: May 26, 2014, 11:34:20 am »
OK, quickly tested the 0.500 pipe late yesterday, it appears to be doing what we expected. Saw tops out (no load) @~11K, pulling bar/chain ~10.5. Tomorrow will put it in some green wood @ BIL's house. The objective of this was to see if we could keep the saw between max torque and max HP range with the tuning of the pipe. The saw will turn more RPM with the 0.800 pipe 12.5K but at that it has already fallen below max HP revs.

Our numbers indicated a 3.75 inch long pipe @0.500 diameter, however I left the pipe long (4.25 inches) so that I could take material off the pipe to see what changes it would make.

Got a BB kit coming from China, going to put it on 'Rat-Saw' with no other mods and see what happens with the tuned pipes. Then delete the base gasket and test again, then take it apart and try a Stihl 038 Magnum piston and test again......Should be fun!
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