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Chainsaw
How can I increase saw rpm (thus HP) through engine mods?
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<blockquote data-quote="jughead500" data-source="post: 4014954" data-attributes="member: 73968"><p>You can get more RPM from Porting.Some From a Muffler Mod but alot of your RPM is Governed by the weight of the Crank weight.If you turn the diameter of the Crank down then that will lighten and raise your RPM.BUT if you do that it lowers your Primary Compression.Then you have to Install a Crank case stuffer to take up enough Volume to raise the Primary compression back up.</p><p>In your case I would just start with a Muffler mod.Since your saw is reed valve and not piston port you may be able to do some porting and go with some windows drilled in your Piston skirt.Becareful though.Read up on the subject before modifying.:msp_wink:</p></blockquote><p></p>
[QUOTE="jughead500, post: 4014954, member: 73968"] You can get more RPM from Porting.Some From a Muffler Mod but alot of your RPM is Governed by the weight of the Crank weight.If you turn the diameter of the Crank down then that will lighten and raise your RPM.BUT if you do that it lowers your Primary Compression.Then you have to Install a Crank case stuffer to take up enough Volume to raise the Primary compression back up. In your case I would just start with a Muffler mod.Since your saw is reed valve and not piston port you may be able to do some porting and go with some windows drilled in your Piston skirt.Becareful though.Read up on the subject before modifying.:msp_wink: [/QUOTE]
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