If I was to upgrade one of the saws to 28" bar, which would you use the 6400 or the 670?
Since I have not ran the CS670....I cant give an accurate answer.
You have ran both. Which one do you think has the most power to pull a 28" bar??
Aside from that, I'll give a shot at some good advice here:laughing:
I would buy the 28" setup for the dolmar. Because that bar mount "will" also work on the echo with some slight modification (or not).
From my reading/digging, the oil hole will match up fine. But the echo bar uses smaller studs and thus a smaller slot. You can either make some small washers/spacer, or just know that the slot is too bit, and be sure to pull up on the nose of the bar when tensioning and tightening the nuts. And now you have the 28" that will work on both. But you cant make the echo mount work on the dolmar (without opening that slot) and then you would be in the same boat.
I am no stranger to modifying bars to work. But the dolmar mount is refered to as the "large husky" mount and is pretty common and easy to get. Most of my older dolmars have the "small husky mount". ANd it isnt to hard to make a large mount work. It isnt rocket science. Actually, the 24" on my 6400/8400 was a carlton on closeout at baileys pretty cheap. WRONG mount though. Slot was TOO wide. But the oil and tension hole line up fine. So what if there is a little slop before everything gets locked down.
So to sum it up....I dont know how the cs670 compares power wise, but I'd get the dolmar mount because you can "make" it work on the echo. And when you go to order that bar, you might as well order the NWP BB kit for one of them 6400's
I'd also reccomend semi-skip chain too. Takes less power, and can actually cut faster in large stuff. Because there is more room between cutters for chips to collect. If you run full comp chain, once there is no room for chips, the cutter quits cutting, and robs you of power to pull the rest of the cutters through. Something like that