Speeding up a stihl MS066?

[Tony Croft aka hamadryad]

O.k I've now seen enough footage of guys using "modded saws" to ring up butts in a way that can only be described as "efficient" to warrant some enqiuries into the pros and cons and even methods for speeding up a decent sized saw.

 

I know some of you guys are familiar with this stuff so whats your views on this, hows it done, what can you do, and just how much difference can it make?

[john dawson]

if you want, you can re-tune the saw using the h,l,al screws. you need a tachometer to do the H screw tho, as over doing it will foul up the engine.

[Mozza]

Petemate390xp is the man on here to talk to Tony When i get a new groundsaw ill be sending my trusty Husky 365 to him for some pimping!!

[Omniata]

If it's an 066 you may be able to use one of the "large bore" kits for a 660?

 

It would increase the cylinder bore and thus the "cc" of the saw giving it more power...

 

Big_Bore_Kit

 

Porting it would be beneficial too, grinding out the ports with a diamond bit on a modelling drill then polishing to make the fuel/air and exhaust flow smoother...

Edited January 24, 2010 by Omniata

[skyhuck]

A sharp 66 with 25" bar and 8 tooth sprocket cuts plenty fast enough for me.

[MattyF]

sharpness is the key ! nothing wrong with stock saws as long as they are used by operators who can sharpen well .

[wiley_p]

A very easy power gain can come by opening the exhaust port up on the muffler, adding an aftermarket filter like a Maxflow. Remember it is important to richen the high jet when this is done. The limit caps will need to be moved so you can increase fuel on the high end.

this simple action will give a marked increase in performance.

[jonathan hall]

A sharp 66 with 25" bar and 8 tooth sprocket cuts plenty fast enough for me.

 

i agree, the only reason i would want squeeze more power out a saw is for milling.

just buy an 88 instead!