Stihl 041 super
ArboristSite Operative
what happens when you boost the compression in a saw from 120 psi
to 160 psi does the torque or horsepower go up or down?
to 160 psi does the torque or horsepower go up or down?
compression question
- Thread starter Stihl 041 super
- Start date
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neverenough
ArboristSite Member
It depends. How do you plan on doing this???? Adjusting the thickness of the cylinder base gasket? head gasket? shaving the head? shaving the deck? There are different ways to raise the cylinder cranking pressure, some ways will be advantagous, while others will hinder the performance.
spacemule
The Peanut Gallery
Your saw becomes harder to crank.
Lawn Masters
Addicted to ArboristSite
Also, are you planning to modify the ports to keep the timing the same or improve it?
Stihl 041 super
ArboristSite Operative
the way that i was thinking was to deck the cylinder. also keep the timing the same
neverenough
ArboristSite Member
I'm sure there are many here who know chainsaw motors much better than me, but shaving the cylinder can be either good or bad. Yes, it will increase power, but, if the squish band becomes too thin, preignition can happen causing damage to the piston and/or head. Before doing anything like that, it's best to consult with someone who knows the particular motor in case the head has to be modified too. Good luck.
