Mastermind Meets The MS661 C-M

[chadihman]

Heck I'll ship three of those mufflers to you to tinker with if I can get em. Give me a minute to get on my work laptop and see if there available.

 

[LowVolt]

Heck I'll ship three of those mufflers to you to tinker with if I can get em. Give me a minute to get on my work laptop and see if there available.

Look for dual port cover too!

 

[HuskStihl]

That saw is unfortunately triple my saw budget. Too bad, looks amazing. Randy, how does the spring AV feel compared to 390 AV? A big Stihl with spring AV could feel like a husky if it weren't careful[/quote]

 

[splitpost]

Without having a side by side that 661rear half looks like it may take the new model 880 front half

Sent from my GT-S7500T using Tapatalk 2

 

[chadihman]

Found all the part #'s for the 661. I can't get any of the #'s to work in our parts system. Too new I guess. I'll give Stihl a call in the morning.

 

[windthrown]

I wouldn't worry about the epa at our level. Sure a Global company like Stihl or Husq has to fall into compliance, but what we do in our own backyard is our business. I dont think that they have the resources to hound every violation on an individual basis. I have 3 Diesel trucks- 97 7.3 Powerstroke, 04 5.9 Cummins, and a 2010 4500 with 6.7. Only one of them is Emissions Compliant and it is an absolute turd compared to the others. The other trucks will walk all over it. As soon as the warranty expires- all that emissions crap is coming off- I have 10K miles to go.

Might work in a state/region where they do not do vehicle testing. Here in most areas of the west, they plug your vehicle into the computer and it must comply with the air quality standard, or you do not get a license plate sticker. You can also be pulled over by the police, or turned in by anyone that sees your vehicle smoking here. Then they send you a citation requiring another vehicle smog test. Also as I read it, the EPA is going after the industry side in regards to smog laws. So they are sitting on manufacturers, importers, and factory dealership/shops, and anyplace where licensing is involved. Also as I read it, as a saw owner you can do whatever you want. Its just the choke points like importing and dealership shops where they can make things difficult.

 

[Mike from Maine]

Also as I read it, as a saw owner you can do whatever you want. Its just the choke points like importing and dealership shops where they can make things difficult.

Obviously it would be hard to come after individual saw owners...

Only matter of time before the .GOV comes up with a more creative solution then the stupid plastic limiters. Like say a sub-routine on those fancy micro chips that determines if the saw is using to much fuel and then kills the ignition.

Because, you know, chainsaws are the source of global warming.

 

[singinwoodwackr]

Yeah, I'm gonna do that boss.

I don't think the muffler mod alone with do that much for it. I don't want to add extra outlets, and make it overly loud either....

hmm, the original 066 had 7.8hp with the dual port (red-eye) vs 7.0 for the single port. (what my original spec sheet shows) That's a substantial difference. When I first got my 066 I had broken an ear off the OE muffler front and ordered a replacement. What came in was a flat, no-port, cover that I figured I'd try. The saw would barely run Returned the 'new' cover and had the old one fixed...problem solved. Opening up the dual port holes a tad added a little more gain. opening them up too much, however, made things worse ...good thing I have a bunch of extra covers.

 

[singinwoodwackr]

I just have this one muffler Chad. Do you think I should mod the saw and run it with the stock muffler, then mod the muffler?

Tree Monkey and I talked on the phone about it last night. He thinks that the baffle is just for bracing, and should be removed right away. It looks that way to me as well, though it is a better way of bracing the muffler than we have seen in the past.

personally, I'd leave that baffle alone...not restrictive at all and looks to add some strength to the muffler.

 

[redbull660]

I got some ok gains over a bone stock 660, simply by removing the baffle. Then I went a step further and got some real nice gains, when I added the DP muffler and made the stock port bigger yet.

based on that I would think we could see some nice gains if randy did a MM on the 661. ...but I wonder how much the 660 dp style muff cover helps by venting directly out the front vs out the side? Meaning, that a MM on a 661 on the side instead of out the front might not produce as good of gains as a front venting cover?

 

[Mastermind]

That saw is unfortunately triple my saw budget. Too bad, looks amazing. Randy, how does the spring AV feel compared to 390 AV? A big Stihl with spring AV could feel like a husky if it weren't careful

[/quote]

Smooth baby.....smooth.

 

[mdavlee]

hmm, the original 066 had 7.8hp with the dual port (red-eye) vs 7.0 for the single port. (what my original spec sheet shows) That's a substantial difference. When I first got my 066 I had broken an ear off the OE muffler front and ordered a replacement. What came in was a flat, no-port, cover that I figured I'd try. The saw would barely run Returned the 'new' cover and had the old one fixed...problem solved. Opening up the dual port holes a tad added a little more gain. opening them up too much, however, made things worse ...good thing I have a bunch of extra covers.

There's a difference in cylinders also on those two versions. The earlier cylinder makes more power than the layer versions.

 

[chadihman]

There's a difference in cylinders also on those two versions. The earlier cylinder makes more power than the layer versions.

It would be really nice to see the dyno specs from the saw companies. My dyno runs showed some really neat #'s that I never really thought of before. What rpm the max HP is at is important. Some saws have max HP at 10,000 some at 8,500 or lower. Some hold there max HP at a broad range in rpms and some drop HP quickly when the load is pulling it under its max HP rpm. A saw that has 7 HP at 10,000 rpms and holds that hp all the way down to 8000 rpms is going to be a serious ripper

 

[trophyhunter]

You guys really give me too much credit. I'm not doing anything special to any of these saws. I'm just careful not to over do them.

I read every one of your threads and pay attention because I always learn something and take that away from it. That is something *special* on account of you taking the time to be careful and painstakingly methodical in attention to detail and performance one job at a time, every time.

Your the best in the business because of the amount of work and attention every saw you put your name on gets, and it doesn't go unnoticed. That is special, and worth every penny the finished product costs. The fact you choose to share all of that knowledge on the forums is a big deal to guys looking for straight answers when it comes to spending their hard earned dollars making saw purchases or mods.

Whether someone needs a new saw or just want's one it's a very big deal, cause these things aren't cheap. Mastermind meets *any~saw* threads are pure gold for not making expensive mistakes.

 

[Reyn]

This laptop is the problem.......it's just slow, and locks up a lot. I have zero patience for that sort of stuff.

Lookin at boobies online will do that.

 

[Mastermind]

Lookin at boobies online will do that.

Ah.....the voice of experience.

 

[mdavlee]

It would be really nice to see the dyno specs from the saw companies. My dyno runs showed some really neat #'s that I never really thought of before. What rpm the max HP is at is important. Some saws have max HP at 10,000 some at 8,500 or lower. Some hold there max HP at a broad range in rpms and some drop HP quickly when the load is pulling it under its max HP rpm. A saw that has 7 HP at 10,000 rpms and holds that hp all the way down to 8000 rpms is going to be a serious ripper

I wish I had a few different cylinders to send you to test or a whole saw. Once I hit outages this spring I may be willing to part with a saw or two for you to run on the dyno.

 

[windthrown]

Yes, this site has tagged p o r n as a bad word. So you have to type porno, or porne, or fully spell out pornography. Go figure...

However, typing shyte is OK here. The Irish accent version of sh*t.

 

[Mastermind]

Randy, how large is the port opening on the 661 Muffler?

15mm

 

[redbull660]

k, thought it looked bigger in the picture than the 660. Pretty sure that is 15mm as well.