Chainsaw Repair
Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Stihl => Topic started by: CATDIESEL on March 17, 2013, 09:07:29 pm
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has anyone here ever tried making intake/exhaust runners longer or shorter for more performance? i guess the exhaust would affect the performance the most? i have thought about decking the exhaust flange on the jug. also making some custom spacers to move the muffler away from the jug in 1/4" increments. any thoughts on this?
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In general, longer intake will bias the tuning towards lower rpm. Calculating the resonance frequency is beyond my ability but there may be some programs available to do this on two strokes....
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Resonant frequency on both the intake and exhaust is the ellusive pot of gold nobody has managed to acheive over any width of rpm range except a very narrow band .