Mastermind Meets The MS661 C-M

[redbull660]

going to have to buy a service plan for the 662 if it has all that.

 

[Trx250r180]

Well in other news ,my stihl dealer said they re released the 660 wrap model,it was actually not availible recently due to the 661 ,all they could get are half wraps

 

[Mastermind]

You fellers are re-inventing the wheel here huh?

I've got a new muffler for the 661 and will try it un-modded today.

Thanks to Chad, we have this new muffler, and a cylinder kit in route. I want to try just doing machine work on a new jug with no port work. This saw has such a tight crankcase, that I wonder if 7900 like numbers would work better than what I did on my first trip thru.

Rest assured that we will figure out where the gains are at in the 661.......long before most guys will have one in hand.

 

[redbull660]

wish they would do a 661 with a carb/non mtronic. I like my screw driver. But BUT BUT that spring AV would be really nice so if they don't I'll have to get a 661cm.

 

[Venomvpr900]

You fellers are re-inventing the wheel here huh?

I've got a new muffler for the 661 and will try it un-modded today.

Thanks to Chad, we have this new muffler, and a cylinder kit in route. I want to try just doing machine work on a new jug with no port work. This saw has such a tight crankcase, that I wonder if 7900 like numbers would work better than what I did on my first trip thru.

Rest assured that we will figure out where the gains are at in the 661.......long before most guys will have one in hand.

No doubt in my mind!!!

 

[HuskStihl]

What are the 660's going for? Prolly get a brand new ported 660 for significantly less than than the 661. I'm thinking about skipping Autotune altogether and waiting for fuel injection

 

[mdavlee]

What are the 660's going for? Prolly get a brand new ported 660 for significantly less than than the 661. I'm thinking about skipping Autotune altogether and waiting for fuel injection

Depending on your dealer a wrap 660 will be $940 and up.

 

[shootingarts]

You fellers are re-inventing the wheel here huh?

I've got a new muffler for the 661 and will try it un-modded today.

Thanks to Chad, we have this new muffler, and a cylinder kit in route. I want to try just doing machine work on a new jug with no port work. This saw has such a tight crankcase, that I wonder if 7900 like numbers would work better than what I did on my first trip thru.

Rest assured that we will figure out where the gains are at in the 661.......long before most guys will have one in hand.

Randy,

I think the doohickey thing I was trying to remember earlier is the bolt on chunk of aluminum to aid bearing lubrication or something in the bottom end. Since I only vaguely remembered anything about it I didn't realize it was something that came off and was put back. Might not have even been in one of these threads either, too much reading not enough doing lately although I did get out and whittle awhile yesterday. Raining for days now, back to the 'puter!

Anyway, you are wondering about that tight crankcase, looks to me like that doohickey is a handful of cc's in volume judging by the image. Don't know if it would be worth the bother but pulling it and leaving it off for a test run or two might answer your questions about case volume or at least give some indications. Can't send it out the shop like that but it might help with your small volume case curiosities.

Just a passing thought.

Hu

 

[Mastermind]

Hu, you are talking about the baffle/stuffer under the piston. It was in the 461 thread that we removed it to see if there were any gains to be had from that. It directs the incoming charge upward to cool the piston pin and crown.

I don't want to remove it at all in this saw. Just pulling it and disturbing the bolts that hold it are not in my head at this time. Stihl has those lock rings on their fasteners, and they cut in, taking some material off each time they are tightened. If there is not a good reason, I don't want do anything that could inadvertently get debris in the crankcase. It could thin the flange and weaken it a bit as well.

 

[Mastermind]

hey Randy, what if you just put a hole in the center of the front muffler cover and then put spark arrestor screen over it. Kinda like the 660 setup. Wouldn't the exhaust venting straight out be the easiest quickest path?

Adding exhaust outlet can be done with a piece on sheet metal in place of the cover........just add size and see what happens. Treemonkey's idea.

 

[Jacob J.]

Are you kidding me? Listen to how folks gripe now about m-tronic/AutoTune adding complexity to their saws.....

People are gonna gripe anyway, it's what people do.

 

[shootingarts]

Hu, you are talking about the baffle/stuffer under the piston. It was in the 461 thread that we removed it to see if there were any gains to be had from that. It directs the incoming charge upward to cool the piston pin and crown.

I don't want to remove it at all in this saw. Just pulling it and disturbing the bolts that hold it are not in my head at this time. Stihl has those lock rings on their fasteners, and they cut in, taking some material off each time they are tightened. If there is not a good reason, I don't want do anything that could inadvertently get debris in the crankcase. It could thin the flange and weaken it a bit as well.

Gotcha! I hate locking devices that do damage every time they are tightened down. Definitely understand about debris too. After taking race car engines back apart two or three times because visitors came stomping into the engine area of my shop I started not doing assembly until about three in the morning on my race engines. A chuckle, a friend took the opposite approach. After blowing several high dollar engines built in near laboratory conditions he decided an engine needed a little "friendly dirt" in it while it was being built so putting it on a dirt track wasn't too much of a shock to it's system!

Hu

 

[MasterMech]

wish they would do a 661 with a carb/non mtronic. I like my screw driver. But BUT BUT that spring AV would be really nice so if they don't I'll have to get a 661cm.

My understanding is that they did, but only in Europe/UK. At least that is what I gathered from some chatter on forums over there. That's going to a rare bird (non-MT 661) indeed.

 

[Mastermind]

I just want everyone to know that I'm done here on AS. Claudio and I can see eye to eye. He can keep the place......I'm out.

 

[MasterMech]

I just want everyone to know that I'm done here on AS. Claudio and I can see eye to eye. He can keep the place......I'm out.

Wow, that's a big/tough decision on your part....

 

[LowVolt]

I just want everyone to know that I'm done here on AS. Claudio and I can see eye to eye. He can keep the place......I'm out.

Freedom of speech gone I guess?

This sucks...

 

[Officer's Match]

WTF?????

 

[bootboy]

So where are you going randy?

 

[Mastermind]

You can bet your ass I'm not going to stop modding saws, and I'll never be hard to find. Just like always, send me an email, pm, or phone call, and I'll be there.

 

[bootboy]

Found you, and that sexy saw