Stihl 064/066/288 Saw Build

[Brewz]

Did you chamfer the inside edges of the bottom of the skirts?

Yep, that is done.

 

[jmssaws]

Is it done yet?

 

[Brewz]

No mate. I wish!

I work as a control system engineer in the coal mines and they have kept me busy 12 hrs a day this week.
I also have no lathe (yet...... Bought one yesterday, pick up on Saturday)

I also have bills and 15 saws in parts in the workshop that need re-construcxtion to pay said bills before my play toy gets attention.

It may be a few weeks yet.

I will need to destroy a couple junk cylinders on the lather to practice before I go cutting on my good one!

Watch this space.

 

[Brewz]

I looked at the box of dirty parts this afternoon and let out a sigh
I sold my red light to pay for the lathe so now I plan to use the lathe to build something better than the red light!

 

[Brewz]

I had a new Hyway 066/660 piston and cylinder kit show up for a flip saw today.
I bolted it on the MS660 base and thought I would measure the timing, just for education sake, as the quality was fairly good internally.

Measured 95, 128, 85

OUCH!!!

It does have a nice flatish top on the exhaust port to open most of the port quick but then 33* of blowdown is going to destroy that as an advantage.
Its a flip saw so I dont give a toss, but it would take some serious grinding on the uppers to get the blow down to a better level which would just slow velocity and hurt it anyway.

I thought about having a grind on it but not much point really.
It makes my bad OEM jug look amazing!

@jmssaws have you measured the Meteor cylinders to see what they are like?

 

[jmssaws]

No I haven't.
I tried to make a aftermarket cylinder strong as a oem but failed and gave up.

 

[jacob j.]

I bought a Meteor cylinder for a 288 and was disappointed in the timing. I haven't put a degree wheel on it yet but the exhaust is quite a bit higher than stock and the transfers angle pretty steeply toward the combustion chamber which is going to kill the torque band.

 

[jmssaws]

The new stihl branded 660 cylinders are the best I've ever seen as far as finish and timing.
97/98 120 77 is about as good as they come. I have a mahle no decomp that's
97 117 77 and that's the best I've seen.

 

[Brewz]

Yeah the numbers are way out there hey!
I wasnt looking for a cheap option, I actually bought the Hyway kit so I could keep the nice KS 660 P&C on the saw when i stripped it.

The KS measured identical to the other OEM one I plan to use for this project so it now lives on my 066 with the "erectus maximus" air filter

Hey, there has to be some perks to this saw rebuilding game.
the 066 also has the oil pump from the redlight which was more like an oil well than an oil pump. It made piss revving more like flood revving.

 

[jmssaws]

I have changed my thinking on exhaust and intake height.

 

[Brewz]

mmmmmmmmmmmm.............?

 

[jmssaws]

The exhaust don't need to be as low and the intake don't need to be as high as I thought. If your transfers are right you can have the exhaust and intake all over the place and it will run about the same.

 

[Deets066]

If I remember right, didn't Wigs have a 66 no decomp that was 99/117 stock?

 

[jmssaws]

If I remember right, didn't Wigs have a 66 no decomp that was 99/117 stock?

I think So.

 

[Brewz]

When you say "transfers are right", are we talking size and shape, height relative to TDC (118* v's 124* for example) or blowdown?

 

[jmssaws]

You want them in the low 120's and there factory shape.
I pay no attention to blow down anymore.

 

[Brewz]

Would you bother raising transfers that were, say around 128*

My thinking is that will make the upper port larger and lower velocity, but is the tradeoff worth it

 

[drf256]

Interesting build thread Brews. Thanks for posting.

BTW, I cut my cobalt steel cutters to length with a plasma cutter and then grind off the kerf.

 

[Brewz]

Ahhhhh well its taken a setback with the deal on the lathe falling through.

I was only getting it because it was affordable.

It will have to sit in the box as a dirty pile of parts till I can get more money together to get myself one but at the moment, unfortunately the bills have to come first.

 

[paragonbuilder]

Ahhhhh well its taken a setback with the deal on the lathe falling through.

I was only getting it because it was affordable.

It will have to sit in the box as a dirty pile of parts till I can get more money together to get myself one but at the moment, unfortunately the bills have to come first.

Damn! That sucks...
I had one fall through on me a while back too.


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