I know that it makes me sounds boring,
And it could get me ostracized on a fan site like this.
But it's an election year, so a good time for all opinions to be heard.
Anybody else satisfied with stock chainsaws? Happy if they start and run the way that STIHL or Husqvarna (or other) engineers intended them to? I never heard of 'modded' saws until frequenting sites like this. And a few have been fun to try at GTG's. But I have had plenty of frustration with saws that wold not start, or were dirty, or poorly maintained. So give me a clean, well maintained saw that starts, runs, and has a sharp chain, and I am probably going to be a happy camper.
(flame on)
Philbert
No flame from me on this issue. Good post. I have come full circle from stock to woods ported to race and back to stock/lightly modded (to intended design specs, or at least tolerable specs). Engineers have to compromise on stock designs that have to meet strict requirements for EPA, longevity, AV, style, sales appeal, marketability, reliability, competition, durability, usability, price, etc. etc. Modders do not have to deal with most of that. Also in terms of modifications, and the extremes modders seem to be taking them to these days, the reliability is likely to decrease, noise levels are likely to increase, and longevity will most certainly suffer.
Most modifications increase power by increasing revs, increasing torque, or both. Simple physics: power = torque x revs. More torque is usually created by increasing compression and that results in more heat. More heat in a 2 stroke is generally a bad thing and can lead to premature engine failure. More piston downforce and resulting crank torque puts more strain on bearings, rods, cranks, and clutches, and that all leads to more and faster wear. More torque and/or higher revs also comes from port modification and increasing the amount of fuel per change. This lowers saw economy and also increases heat, and the increased revs and torque results in more strain on parts. Itty bitty 026 bearings and clutches do not have the design capacity to deal with large increases in power, but that is what those saws parts have to do when people crank the compression to 250 PSI (a 40% increase in compression? -from stock 175 PSI-).
Now the flip side to that are EPA certified and choked up saws that have to pass emission and noise level standards. They tend to lean saws out to the limit to pass EPA, and that tends to lead to saw overheating. They also choke up mufflers to reduce noise levels which also reduces power. So that aspect of stock production saws becomes counter productive for longevity and performance. So with newer EPA saws, it is often times better IMO to open the mufflers up a tad to get better air flow and defeat the limiters to run them richer. With those modifications you are likely to get back to the original 'intended' stock design power of the saws. For examples of this, compare the stock US Stihl MS290 and MS361 to the Euro MS290 and MS361 specs, and the Euro saws have about 5% more stock power (mainly from having more open mufflers). Opening up EPA mufflers ~mildly~ will likely reduce heat and actually increase the longevity of the top end. My 361 all have their limiters removed and are run a tad rich. One is mildly ported, one has just a StihlBilly muffler mod, and one is 'stock' for cutting firewood in the burbs.