circle crank ms660

[Keith Gandy]

What burr do u use Kevin for that corner?

 

[Moparmyway]

What burr do u use Kevin for that corner?

A real small tapered one .......... The point does the corner work

 

[Keith Gandy]

A real small tapered one .......... The point does the corner work

U have got it tight!! Looks great

 

[Moparmyway]

U have got it tight!! Looks great

Thank you Sir !!!

 

[drf256]

U have got it tight!! Looks great

I'd have to agree

 

[mdavlee]

Not on a quad. No way to feed them, or I'd try to make a sex saw.

Easy stuff. [emoji6]

 

[MustangMike]

OK, I got some stupid questions, so humor me:

1) If the Meteor 460 piston has wider skirts than an OEM 460, does the Meteor 288 piston also have wider skirts??? (I believe this is what Jason used)

2) Would a 460 ported to the wider skirt Meteor piston actually be stronger???

Does anyone know, and will anyone say????

 

[mdavlee]

OK, I got some stupid questions, so humor me:

1) If the Meteor 460 piston has wider skirts than an OEM 460, does the Meteor 288 piston also have wider skirts??? (I believe this is what Jason used)

2) Would a 460 ported to the wider skirt Meteor piston actually be stronger???

Does anyone know, and will anyone say????

288 is 40mm and 660 is 34mm wide

 

[MustangMike]

Oh, and I almost forgot, does a meteor 440 piston have wider skirts than a OEM 440???

Damn, I'm full of skirt questions tonight, and all you guys just focusing on the breasts!!!

 

[MustangMike]

288 is 40mm and 660 is 34mm wide

OEM & Meteor are the same??? The 288 skirt is also longer, right?

 

[mdavlee]

OEM & Meteor are the same??? The 288 skirt is also longer, right?

Not sure. I've not had an oem piston in a long time.

 

[Brewz]

OEM & Meteor are the same??? The 288 skirt is also longer, right?

All the meteor Pistons I have used have had the same width skirt as their OEM equivelent,

When people refer to the 288 piston having longer skirts than a 660 piston, it is a bit of a positional difference than a physical length difference.

A 288 and 660 piston are the same length.
The difference is that the 288 wrist pin holes are centered higher, which means when it's bolted into a 660, the entire piston sits lower, which in turn makes the skirts sit lower.

Hey presto..... Longer skirts.

Problem is you now have WAY too much squish from the low piston.

That is why J had to machine over double from the base as he did from the squish band.

This then has the wonderfull effect of a low exhaust without excessive compression...... Win win!

I don't think you will find much difference in OEM to meteor off the same saw.

The 288 and 660 pistons are the same diameter and height, but have different skirt width and crank pin centre height.

 

[Deets066]

Maybe I'm thinking off to but if ya didn't half to take so much off the base wouldn't that add case volume?

Agreed

The 056 piston has shorter skirt and shorter crown than s 660. How much shorter of each may decide if it would be a good candidate for the circle crank

 

[Brewz]

If the circle crank wants case capacity, perhaps a 56mm big bore P&C will be the ticket.

maybe this is the big bores calling?

 

[Deets066]

If the circle crank wants case capacity, perhaps a 56mm big bore P&C will be the ticket.

maybe this is the big bores calling?

But..... Does the big bore actually add case volume?

 

[Brewz]

Well there is something I have not completely thought about......... what exactly constitutes case volume?

 

[Moparmyway]

But..... Does the big bore actually add case volume?

It would have to .............. a wider bore will add space, both over and under the piston for the entire bore

 

[Stihl working Hard]

Before Keith G. modified my 660's oiler, it didn't lube my 28" ES bar well. The bar was getting so hot, especially when cutting stumps, paint was coming off the bar. After the oiler mod, it runs a lot cooler.

Did you put the oz 660 oiler in your saw or was it modified

 

[Stihl working Hard]

The new GB bar I bought had the same little angled hole as the Oregon bars do I drilled it out as well

Oiler at max, that's about 3o seconds at WOT and a 10 second video of the red light operating which I will post up in the 066 red light thread soon

View attachment 17233

Looking forward to that thread

 

[Stihl working Hard]

Oh, and I almost forgot, does a meteor 440 piston have wider skirts than a OEM 440???

Damn, I'm full of skirt questions tonight, and all you guys just focusing on the breasts!!!

LMAO