circle crank ms660

[CR500]

Intake is likely staying where it is,the saw has tourqe. Transfers are gonna come up a couple degrees when I port it today.

I'll find out next week if I can beat it with a 661,I think it will be hard to do.

I don't know,but I think it will do it.

661s are strong stock but it appears that after some R&D that possibly the 660 is on a comeback streak.

I will eventually get one.

Sent from my non internal combustion device.

 

[jmssaws]

For educational purposes...... can you elaborate further on the effects of too much blow down?

It simply feels held back.
Do enough for them and you can feel it.

 

[Brewz]

Haha... do enough of them..... thats not going to happen here

 

[MustangMike]

Hate to say it, but it seems like the piston has stolen the limelight from the crank!

I think a lot of 660s may get outfitted with a Husky slug!

 

[MG2186]

Hate to say it, but it seems like the piston has stolen the limelight from the crank!

I think a lot of 660s may get outfitted with a Husky slug!

There already is, Tree Monkey and a few others have been doing it for quite a few years


Sent from my iPhone using Tapatalk

 

[jmssaws]

Yeh this is nothing new

 

[MG2186]

No but still very interesting and getting another perspective on something is always good. It's nice you are sharing all your information you are finding! Keep it up, you are doing a great job


Sent from my iPhone using Tapatalk

 

[jmssaws]

I'm finishing up a 460 then I'm going to port this 660. Gotta pay bills first.

 

[Moparmyway]

I'll quietly add that I believe the 661 will beat the 066/660 ........................
I wonder why I said that ?

 

[awol]

Well I am very curious to see where this go's! I have a 281 piston sitting here, I think I'll try it out in my 064 next time I take it apart.

 

[jmssaws]

I'll quietly add that I believe the 661 will beat the 066/660 ........................
I wonder why I said that ?

I'll be ready in a few hours.

 

[jmssaws]

 

[Definitive Dave]

I'll quietly add that I believe the 661 will beat the 066/660 ........................
I wonder why I said that ?

The official covert Stihl re-education and subversion plan is working OCSRSP forever!!

 

[jmssaws]

 

[jmssaws]

 

[Redfin]

Hate to say it, but it seems like the piston has stolen the limelight from the crank!

I think a lot of 660s may get outfitted with a Husky slug!

At this point the only thing that the 288 piston has done is to keep the comp down. He could have got the same numbers with a 660 piston. Comp would have been much higher though.

 

[drf256]

At this point the only thing that the 288 piston has done is to keep the comp down. He could have got the same numbers with a 660 piston. Comp would have been much higher though.

If squish is the same, why would the compression be different?

 

[drf256]

Im wondering if the lower comp is why it runs so well.

 

[jmssaws]

It runs well cause it's timed good

 

[jmssaws]