If that is true, there is something wrong with the 064.
I'd run 3/8ths on an 036, that's what it was designed for.
I'm not sure who told you that, but their full of fertilizer. The 034/036/360/361/362 was not designed to run any specific chain pitch. You can buy a 026/260/261 straight from Stihl that runs 3/8 chain just like you can buy an 066/660 that runs the same 3/8 chain. That's the nice thing about 3/8 chain. It's somewhat universal, so if you're buying it by the spool you can make loops for every saw you have. .325 chain, on the other hand, is designed to be run by smaller saws. It's narrower kerf helps the smaller saws cut a little faster. 60cc saws are a little big for .325 chiain, but Stihl did and still does offer them that way, and for good reason. Set up correctly, it makes for a very effective firewood saw.
A 7 pin rim is slow, plain and simple. They give the saw more leverage on the chain so that they can run a longer than optimal bar. So, with the 036 family it would alow me to burry a +24" bar without having to baby it so much. If this were my only saw, and I needed to cut wood that was 36" or more with it, then a 3/8 chain on a 24" bar with a 7 pin rim would be a good setup for it. Having said that, if you're cutting much 36" wood, a 60cc saw is probably on the small side for you. An 8 pin rim is actually what the 036 was designed to use for running 18"~25" bars. The 036 family has plenty of torque to pull run an 8 pin rim on these bars. I run an 18" bar because it helps keep the weight of the saw down, and it's more than long enough to most of my firewood.
The 9 pin rim is a bit of a custom setup. Don't knock it till you try it :fing32: The 036 has more hp and tq than an 18" bar needs with an 8 pin rim. I've burried in in oak and hickory, and leaned on it as hard as I could and couldn't stop it. The 9 pin speeds the chain up anohter 10% and still leaves me with plenty of torque as well. I've nocked my drag links down to .040 on this saw. It's NOT for limbing. I've got an 024 that I use for that. When you lay the chain on the wood, you had better have a good hold on the saw with both hands, beause it will pull into the wood whether you're ready for it or not, but it's very fast. Cutting 18" oak is like a hot knife through butter. Actually, I don't think that's true. I don't think a hot knife could cut through 18" of cold butter faster than my saw
There's nothing wrong with my 064. I nooldes a 24" long, 18" round of black locust in 12~15 seconds so I'm happy with it. It runs 404 chain and does just fine.
Everyone assumes that a bigger saw will always be faster than a smaller saw, and that's not the case. On wood that's 12~14" the best that a 90CC saw will ever be able to do is keep up with a 60cc saw. Both saws are going to have enough torque and HP to keep their RPMs up during the cut, so it's going to come down to the speed of the chain, how sharp the chain is, and how much wood the chain has to remove to make the cut. The 60cc saw should beat out the 90CC saw every time because it's designed and set up to cut wood that size. The 90cc saw is set up to cut bigger wood so it's going to give up chain speed for torque. It's designed to burry a bar that's over 30", so torque is critical and it's going to be set up to sacrifice the maximum chain speed in order to maintain plenty of torque for that long bar. Then there's the chain it'self. The 90cc saw is going to be wearing a chain that's designed for big wood. With a 3/8 chain, that's going to be a skip tooth, or semi skip tooth. The chain needs the extra room to be able to carry the chips 30" to the edge of the cut where they can be discharged. That's why I run 404 chain on my 064. I noodle with it a lot (it's my favorite log splitter) and that wider kerf and extra distance between the cutters gives plenty of room to get those noodles out of the cut without wadding them up into a ball where they can't be discharged very well. Either way, on my 064 it's just not set up to have the chain speed that my 036 does, nor do I want it to be. I need it to be able to pull a long bar in trees that are over 3' in diameter, and I need it to be able to noodle effectively.
I don't want to lug around a 15lb power head and a big ol bar to cut firewood that's mostly 7~18" across. The narrower kerf of the .325 chain combined with the significantly increased chain speed of the 9 pin rim makes my 036 so much more efficient that it can burry the bar and still outpace my 064 enough that I have time to come back and cut another 2"~6" from the other side. I'm very pleased with that because it means that my 036 is optimal for cutting firewood and my 064 is optimal for noodling and cutting big rounds. While I don't currently own one, I've run an 026 a few times and I would say that in their stock configuration and in wood that's 8" or under, they will out run a stock 036 with the same configuration. The 026 is tuned to a higher RPM, and in smaller wood it's still able to keeps it's addional chain speed over that of the stock 036. But bump the wood up to 12" or more, and it's a different story. The 026 no longer has the torque needed maintain chain speed while fullying engauging every cutter that's in the wood, and it starts to loose out.
At the end of the day, saws are not designed to run a chain with a certain pitch. Instead they are designed with a specific torque curve that's optimized for cutting wood of a certain size, wich will vary depending on the type of wood. Just like you don't take a mustang to a tractor pull, you don't take your John Deere to the drag strip. Okay, there are a few guys that do, but you have to admit that they're a little off.. entertaining as all get out, but a little off none the less. If the 064/066 were faster at everything, it would mean that the only reason to own the 036 would be the reduced weight, a large part of which is due to the shorter bar. Since I use the 036 mainly for bucking, it would mean that I should sell my 036 and just have the 024 and 064. That's not the case though. Each of the 3 saws has their own purpose that they excell at better than the other two. Thankfully, the farm I cut on has some pretty good size timber on it. Thus I was able to "justify" 3 saws to the wife