Stihl vs Husqvarna
09-02-2007, 10:45 PM
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reducing restriction on muffler is the easiest gain you can do.
taking off muffler screen is a good first step. be sure and adjust carb mixture after any changes.
most muffler mods consists of adding a second port. don't exceed 85% of exhaust port opening in total volume out. again mixture will lean, so be sure and adjust.
expect a 15-20% HP increase from a simple muffler mod.
taking off muffler screen is a good first step. be sure and adjust carb mixture after any changes.
most muffler mods consists of adding a second port. don't exceed 85% of exhaust port opening in total volume out. again mixture will lean, so be sure and adjust.
expect a 15-20% HP increase from a simple muffler mod.
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