Max flow air filter kit.

I'm wondering if anyone here has any experience with these?

http://www.baileysonline.com/itemdetail.asp?item=SAF+660&catID=367

Specifically I'm thinking of this one for my EHP660, saw seems to need to breath a little more imo. But I've heard nothing about these never seen one before in real life, so what's the goods?

Curiously enough I was looking at that for my 066. I wonder how it would do in the real world.....

the fallers here use the green weinies (well they did when i was in the woods anyway) which are similar. i wouldnt use em on the crew saws as they get jumbled in a box together but might on my own "non crew" saw

My "crew" save the other owner Rob Does NOT get to use the 066

I know alot of fallers use them, but alot of fallers also use a straight filter with no cover either. I seem to recall someone I trust in saws (either Lakeside or my Stihl dealer back in WA) who wasn't a fan of them, and said that air flow wasn't improved as much as more dirt was allowed in.
I just know they have that big, orange cover that fades and looks goofy on the back of the saw.

It looks pretty cool to me. Are you gonna order it? Let us know if you do, I'm interested!

I use them.
I am not sure on the extra air flow when clean. But they will flow more air when dirty, like at the end of the day.
If you use a good filter oil on them like Bel-Ray, they do not seam to let any more dirt past than factory. But I have never run one in real dusty conditions, like a burn salvage.

When you wash them out in the sink, you will amazed at all the stuff it stopped.

Thinkin a trial is in order

One of the contractors doing hazard tree felling for me this summer had one on his 660. He was mighty proud of it, asking me if I'd used one before. I said "nope", so he pulled it off the carb mount to show me how the innards of it looked.

There was fine wood dust coating the carb intake and down into the throat. I pointed it out and he said, "yeah, it leaks some dust..."

I was NOT impressed.

It does re-lie on the person to know how to maintain a foam filter.

Point taken, RDog. Looked to me like the filter seal was not aligned properly against the carb plate...unknown to me if that was operator error or design flaw.

And that's the problem...most production timber fallers barely put the right gas in their saws. They go through saws yearly and they often look at saws the way we look at air filters: disposable.

I think you might get better air flow through the saw of course, but again, I think it was Andy at AS (who's the most knowledgeable Stihl guy I know) who didn't recommend them if you wanted the best for your saw. He says the factory Stihl filters when cleaned properly have more than enough air flow and work great. What happens is the timber guys don't clean their Stihl filters and think, "man this saw runs like a dog and needs more air..." They go and get the max flow kit and yeah it runs great because air and everything else is going through it. But by the time they've eaten their piston and jug up, their saw is toast for the season anyway because the bearings are shot, it's got air leaks and a skidder ran over it. I say unless you go through a saw a season, skip it.

And if you do want to maintain it with the oil and such, that's great, and it'll work fine for you...but then you're back to about the same airflow as a clean factory filter...which if you're going to oil this thing, you're likely a guy who'll clean his factory filter and you're back where you started. JMO.

It sounds like I'm gonna pass.

The reason I started using them, is I can get thought the whole day without changing or cleaning a filter.
On the Stihl filters I had to change the felt half way thought the day. With the max I can run for two days.
B, I will pull mine off and see how much has made it thought.

Yeah, I don't cut that much. My filters get by with a daily cleaning, no problemo.

Yeah, right now I can get by with monthly cleaning.

Hmm at the price I don't think I'm gonna try it out then.

Here is some flowbench work done by a member over on AS.

Some interesting results...


Open Plate Configuration CFM @ 28"H2O CFM @ 25"H2O CFM @ 10"H2O see Pic: 2 1/2" ID orifice plate, flowed at 28"H2O
Stock HD Filter Notes:
filter only 227.2 214.7 135.9 2 Prewrap caused 60% drop in flow
filter & prewrap 135.5 128.0 81.0 3

Max-Flow Filter
dry 60-pore filter only 186.1 175.9 111.3 4 Notes:
dry 60-pore filter & nylon 152.5 144.1 91.2 5 Nylon caused 20% drop in flow to both foam elements
oiled 80-pore filter only 144.2 136.3 86.2 6 Outers caused 7% drop in flow
oiled 80-pore filter & Outers 134.0 126.6 80.1 7
oiled 80-pore filter & nylon 114.2 107.9 68.3 NA

Intake System Configuration CFM @ 28"H2O CFM @ 25"H2O CFM @ 10"H2O see Pic: Stock carb - WOT - 0.8125" orifice plate, flowed at 28"H2O
Stock HD Filter Notes:
no filter; open backplate/radius inlet 41.8 39.5 25.0 NA Prewrap accounts for <4% drop
filter only 40.2 38.0 24.0 8 Cover accounts for 0.4CFM drop on average
filter & prewrap 38.8 36.7 23.2 9 Deflector accounts for 1.0CFM drop
filter, prewrap, & cover 38.2 36.1 22.8 10
filter, prewrap, & deflector 37.2 35.2 22.2 9 also
filter, prewrap, deflector, & cover (stock Stihl) 37.0 35.0 22.1 10 also

Max-Flow Filter Notes:
dry 60-pore filter only 41.1 38.8 24.6 11 w/Dry 60-pore filter, virtually no loss if run w/nylon or Outers
dry 60-pore filter & nylon 41.0 38.7 24.5 12 Again, deflector accounts for 1.0CFM drop
dry 60-pore filter & cover 41.0 38.7 24.5 13 MF rain cover causes virtually no drop in flow
dry 60-pore filter & deflector 40.1 37.9 24.0 11 also
dry 60-pore filter, deflector & nylon 40.0 37.8 23.9 12 also
dry 60-pore filter, deflector & cover 39.9 37.7 23.9 13 also
oiled 80-pore filter only 41.0 38.7 24.5 14 w/Oiled 80-pore filter, virtually no loss if run w/nylon or Outers
oiled 80-pore filter & nylon 40.9 38.7 24.5 15 Again, deflector accounts for 1.0CFM drop
oiled 80-pore filter & Outers 40.9 38.7 24.5 16 MF rain cover causes virtually no drop in flow
oiled 80-pore filter, Outers & cover 40.9 38.7 24.5 17
oiled 80-pore filter, Outers & deflector 39.9 37.7 23.9 16 also
oiled 80-pore filter, Outers, deflector, & cover 39.8 37.6 23.8 17 also





I don't know if it is ok to post a link to the thread.




.

I run a green weenie on my 660 costs $6 for a new filter compared to $30 for one from stihl.

It's OK to post links, John.

MasterBlaster said:

It's OK to post links, John.

Click to expand...

Thanks Butch,

Here is a thread on AS comparing the Stihl HD filter and the Max-Flow filter.

Here are some pictures of the saws with 3-5 tanks of fuel thought them.
All are holding the same max rpm as when the filter was clean. So no rich condition yet. I could run them for another day or two no problem.
The first is a 440 BB.
The second is a 046.
I put the 441 just for reference. I find it only needs cleaning about every 6-8 tanks of fuel.

Tzed250 said:

Thanks Butch,

Here is a thread on AS comparing the Stihl HD filter and the Max-Flow filter.

Click to expand...

I'm blocked from there. What was the general concensus?

Nice pics, Reddog.

MasterBlaster said:

I'm blocked from there. What was the general concensus?

Click to expand...

That a HD stock filter flowed more air, atleast when clean. I'm not in the bush no more so my filters and saws stay cleaned up pretty good.

Looks like it's working well for you Reddog, thanks for the pics!

Think with all this in flow rates,,, Just stay stock. I do need to replace them though. Looks like too much small dust getting through on the 066. I have to clean mine every day minimum... When she gets in the field, there's a good reason.