Buxton_Work_Saws
Member
660 Build
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Let's Build A 660!
- Thread starter Buxton_Work_Saws
- Start date
Buxton_Work_Saws
Member
Mounted up.. let the shenanigans begin.
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jasent
Well-known member
Just started a 066 build my self
Buxton_Work_Saws
Member
Buxton_Work_Saws
Member
Ready to start making some corrections! Gotta get that exhaust where it belongs on these!
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Buxton_Work_Saws
Member
Machine work done .040 out of the band netted us 98 125 82 ... I typically like these at 100 but we are going to fly with it. On to grinding. I definitely do not want to move the intake or exhaust. But we will widen and raise the uppers.
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jasent
Well-known member
Mines just a box of parts right now
Buxton_Work_Saws
Member
I have a few personal saws like that. Everytime I think I have time... something comes up.
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jasent
Well-known member
Yes this one is a personal saw also. Started the project about 4 months ago. But summer is very busy time for me. Probably won’t have it finished till fall. No hurry tho got a 066 in my fleet already
So you are going to make a later 660 cylinder behave more like the earlier 066 ones? 
Buxton_Work_Saws
Member
About ready for assembly final numbers are 98 120 82 .... I'll grab a video in wood later today.
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Buxton_Work_Saws
Member
I wouldn't say that.. but with the lower exhaust it will hold better rpm pulling a long bar. Will also handle a 8 pin better on shorter bars.So you are going to make a later 660 cylinder behave more like the earlier 066 ones?
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Over here if you want a stronger, or faster, or deeper saw- you just go buy a bigger one.
I can't compare numbers or anything- I'm not a porters butt hole- never done one, never claim to know how to.
What I do know though from using them, is the early 066 was a stronger stock saw than the 660, top bottom and in the middle.
Buxton_Work_Saws
Member
You had the right idea... Some of the older cylinders did have better timing.Over here if you want a stronger, or faster, or deeper saw- you just go buy a bigger one.
I can't compare numbers or anything- I'm not a porters butt hole- never done one, never claim to know how to.
What I do know though from using them, is the early 066 was a stronger stock saw than the 660, top bottom and in the middle.
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Fabz
Active member
The 064 and 066 had nice cylinders that made excellent torque when modded. The 660 suffers from a low BMEP right from the factory. Fortunately with some flow-porting / tricks and piston mods they can be made to run well. Here’s a climber I hired that wanted to try it out on a big silver-maple. Sounds like an old Mac but she throws the chips. Stock squish and NO machine work ....
Brett Carter
New member
I’ve always been a sucker for a good 660 build. Nice work! Any plans for ignition advance?
Fabz
Active member
No plans for ignition advance on the 660 though she is running pretty Rich in that video. For a guy who is into racing saws and looking for the final 1-2% ignition timing may be critical for victory whether advanced or retarded .... For a good running worksaw advancing the timing will give more torque at the expense of overall power. I attempt to build em with plenty of Torque so I’m good there! ..... I’m in Ny at 600ft/sea level so the air is relatively dense, same guy/saw fuel etc cutting in Oregon at 3500ft could benefit from from a few degrees advance as the air is thinner. The only way to know for sure is to p/u a few xtra keys and start playing around with it. Really don’t think it’s the be all/end all that some make it out to be imho
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Buxton_Work_Saws
Member
Fabz
Active member
Here’s the same 660 with a tuned pipe running pig rich at 12,500 ...
... Again , flow-ported, piston mods and some flow tricks. Again , No machine work (squish band cut, base cut or “decking” the cylinder and stock squish with stock base gasket . Not a dedicated race saw by any means. I can remove the pipe , put on the muffler , retune and go cut wood and vice-versa.
RedneckChainsawRepair
Active member
Just a WV loggers woods port with nothing fancy done like todays saws. We are talking old school. Just stock piston. No squish cutting etc.