661 HD2 vs Max flow

[Redbull661]

Tree Monkey 661 404 square ground oregon full comp

HD2 47.5 (clean, knocked out all the dust real good)

same chain max flow green - 44.1 (filter has a couple of tanks of run time on it)

same chain max flow white (more dense) filter has 25 tanks of run time on it with out cleaning.

 

[Deets066]

Nice, is this saw still on mtronic or carb now?

 

[Chainsaw Jim]

The white one even though it is tighter or denser is the same or higher cfm than the green one. I was told that the green one is getting phased out and the white one will replace it.

 

[Moparmyway]

euro coil + wj69 = max rpm is ?

14,600 is the most that I have seen

 

[Deets066]

The white one even though it is tighter or denser is the same or higher cfm than the green one. I was told that the green one is getting phased out and the white one will replace it.

How is this possible Jim? Larger pore will flow more CFM, it's just how it works

 

[Chainsaw Jim]

How is this possible Jim? Larger pore will flow more CFM, it's just how it works

Is pretty simple when it comes to technology you don't comprehend. But don't ask me, ask the stihl dealers and max flow reps who tell this.
But after being told about it I'd venture to guess it's made from a different material that is more breathable allowing a tighter pore.

 

[Deets066]

@Max-Flow Filters

 

[Mastermind]

I'm not a fan of the HD2 filter. Not on the big saws.

 

[Manofstihl066]

I'm not a fan of the HD2 filter. Not on the big saws.

I'm not a fan of the HD2 filter. Not on the big saws.

For the 661, what do you use to hold the max flow on without the cover?

 

[CR500]

For the 661, what do you use to hold the max flow on without the cover?

Have to modify the back cover that comes with the kit to accept the twist lock.

Sent from my non internal combustion device.

 

[Mastermind]

 

[blackjack99574]

After seeing redbulls results I decided to check my 661 with hd2 filter. I've got around 6 to 10 tanks on my filter since I've last cleaned it. The photos speak for themselves. Last pic is what came out when I tapped the filter. I'm ordering a maxflow asap.

 

[Redbull661]

I've never had mine look like that. But I knock the hd2 out at every fuel up. Just habit. But looking at this, I would say it's required to knock out at every fuel up.

Unless you get a max flow setup! I'm at 25 tanks on my test, with no fines getting through at all.


...yeah you just can't tighten the 661 single turn cap down like you can on say a 660 setup. (not an issue with the design of the max flow setup)