Author Topic: Dual Port Muffler Experiments  (Read 1532 times)

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Offline KilliansRedLeo

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Re: Dual Port Muffler Experiments
« Reply #10 on: May 14, 2014, 02:13:10 pm »
Adam, not to my knowledge, IMO the best tuning rpm would be midway between saw's peak torque rpm and peak HP rpm.
approximately 9,000-10,000 would be my guess but we will see.  Saw would be on the pipe as it tries to slow from peak HP to peak torque rpm.  The pipe would not let it do that.

First picture is from the left the factory muffler, next two are 1.75 long pipe and 2.25 inch pipes
Second Picture is the test saw a 365SP with a AM BB kit and OEM Stihl 064 piston, Walbro RWJ-4 carburetor, XT intake setup.
Third is a close up of the 1.25 inch pipe muffler on the test saw
Fourth is all the muffs so far and the saw.

Need to put a bar and chain on the saw and run it to see what is up. All of this is subjective since it is only my opinion and I am the only one running the saw.
 
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