Author Topic: .325 to 3/8 Picco Feasability  (Read 2214 times)

0 Members and 64 Guests are viewing this topic.

Offline brettl

  • 6 cube
  • ****
  • Posts: 179
  • Karma: 7

  • Total Badges: 18
    Badges: (View All)
    Third year Anniversary Second year Anniversary Level 4 One year Anniversary Linux User Mobile User
.325 to 3/8 Picco Feasability
« on: May 02, 2014, 05:05:08 pm »
I'd like to change my 024s over to lo-pro/Picco chain due to the incredible cutting ease of my 200T. Works half as hard and cuts twice as fast with Stihl PM. Problem is, my 024s have the large studs and the tensioning peg sets further from center than any of my Picco bars. I could always turn down the studs but that wouldn't fix the peg placement issue. I've checked Oregon, WoodlandPro, Carlton and Stihl and so far no lo-pro/Picco bar to fit the 024.

Have any of you converted a 024 or similarly built Stihl to Picco/lo-pro? Thanks.
Sthil Man. 011AV, 015, 020, 020, 024, 025, 026, 028 WB(2), 028AV, 028 Super, 029 Super(2), 039, 041, 192TC, 200T, 250, 260, 390, 440, 441

Share on Facebook Share on Twitter


Offline Philbert

  • Gas Hotsaw
  • ******
  • Posts: 563
  • Karma: 76

  • Total Badges: 23
    Badges: (View All)
    Seventh year Anniversary Sixth year Anniversary Level 5 Fifth year Anniversary 500 Posts Fourth year Anniversary
Re: .325 to 3/8 Picco Feasability
« Reply #1 on: May 02, 2014, 06:06:54 pm »
I am not sure exactly what you are describing.  But if you are talking about turning down the diameter of the bar mount studs, I think that it would be easier (and less of a permanent modification) if you widened the mounting slots on the Picco bar.  Same thing with the hole for the tensioning peg (or use an Intenz bar?).

Can you get the right drive sprocket for Picco on your 024?

Philbert

Offline brettl

  • 6 cube
  • ****
  • Posts: 179
  • Karma: 7

  • Total Badges: 18
    Badges: (View All)
    Third year Anniversary Second year Anniversary Level 4 One year Anniversary Linux User Mobile User
Re: .325 to 3/8 Picco Feasability
« Reply #2 on: May 02, 2014, 07:26:58 pm »
I can get the drive sprocket using the Oregon drum and rim Power Mate components. That bar you brought up is one I hadn't heard of. That's a big reason I started this thread, hoping for names I am unfamiliar with. I thought about getting a Dremel out and making that peg hole bigger. I thought of your idea on the bar to but I think turning the stud would be easier and they're cheap if I screw one up. My only concern there is that it might leave the oil plate loose if the final o.d of the stud is smaller than the i.d. of the oil plate.

As a last resort, I could try running the lo-pro on a bar I'm using on one of the 024s now. It has no bar sprocket. I run it beside the 024 with a tip sprocket and so far I've had no problems. Thanks for the input. Keep those other bar brands coming, there's bound to be a bunch I haven't heard of.
Sthil Man. 011AV, 015, 020, 020, 024, 025, 026, 028 WB(2), 028AV, 028 Super, 029 Super(2), 039, 041, 192TC, 200T, 250, 260, 390, 440, 441

Offline Cut4fun .

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 23708
  • Karma: 664
  • OHIO REDNECK Saw Repair Getter Done
    • Redneck Chainsaw Repair

  • Total Badges: 53
    Badges: (View All)
    Tenth year Anniversary Nineth year Anniversary Level 8 Apple User Eighth year Anniversary 20000 Posts
Re: .325 to 3/8 Picco Feasability
« Reply #3 on: May 02, 2014, 07:38:35 pm »
I read about a set up for 024 026 261 in picco. I will copy and paste. Make sure of this info because I dont know.

NOT MY INFO


Rollomatic E 3/8 Picco bar in a 3003 mount. Your dealer probably doesn't stock this thing.  But it lets me run Picco/Low-Pro chain on my MS261

3/8" LP 63PS3 60DL

 Stihl only makes 3/8P rim sprockets in the Mini format so don't go thinking you can run this exact setup on your MS460 etc.

3/8" P Mini in 7 and 8 pin


.325" Mini in 7 and 8 pin
3/8" Mini in 7 pin
3/8"P Mini in 7 and 8 pin




 MS261C-M Try on three types of chisel chain. All are chisel type, round filed, but they are all different pitches. I also had two different size sprockets for the .325 and 3/8P chains. I think you will be surprised at the results.

 3/8 PS3 on 8 pin is running about 8.5-9 secs a cut.

 3/8" RS 7 pin and PS 8 pin about the same, 9.5-10 secs a cut.

 .325 7 pin was about 10 secs 8 pin was 11.5.







The .325 and 3/8 were closer than I thought they would be. But the difference in available torque is quite obvious to me with the saw in my hands. The 3/8ths def. loaded the saw a bit more. The video goes to prove that while the 261 certainly has the grunt to pull 3/8" on a 16" bar like that, it won't do it as well as the other options. The 3/8" 7P was the slowest run of them all IMO. There are other reasons to dislike 3/8" on this size saw too. In smaller, twiggy wood, 3/8ths will grab and bind the saw more than .325 and a lot more than 3/8"P. In bigger wood, especially with longer bars or the nose buried, the extra power consumption will be more apparent.

The 3/8 7 pin had 1 cut that was faster than any of the .325's and some slower..
the PS was the clear winner here though.
It's fast stuff...
Can I put it on the 028??
And what bar am I gonna need again??
I took fastest times..
.325 7 pin = 10.3
8 pin = 10.7
3/8 7 pin = 9.6
PS3 7 pin = 8.4
PS3 8 pin = 7.3
Wood started to shrink at the end...
This was a really good comparison...


Like Like x 1 View List

Offline Cut4fun .

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 23708
  • Karma: 664
  • OHIO REDNECK Saw Repair Getter Done
    • Redneck Chainsaw Repair

  • Total Badges: 53
    Badges: (View All)
    Tenth year Anniversary Nineth year Anniversary Level 8 Apple User Eighth year Anniversary 20000 Posts
Re: .325 to 3/8 Picco Feasability
« Reply #4 on: May 02, 2014, 07:43:35 pm »
Not my info copy pasted

Top to bottom: .325 .063", 3/8" .050, and the 3/8" Picco .050" bar. All were 16" bars and 3003 mount.
Like Like x 1 View List

Offline Cut4fun .

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 23708
  • Karma: 664
  • OHIO REDNECK Saw Repair Getter Done
    • Redneck Chainsaw Repair

  • Total Badges: 53
    Badges: (View All)
    Tenth year Anniversary Nineth year Anniversary Level 8 Apple User Eighth year Anniversary 20000 Posts

Offline Cut4fun .

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 23708
  • Karma: 664
  • OHIO REDNECK Saw Repair Getter Done
    • Redneck Chainsaw Repair

  • Total Badges: 53
    Badges: (View All)
    Tenth year Anniversary Nineth year Anniversary Level 8 Apple User Eighth year Anniversary 20000 Posts
Re: .325 to 3/8 Picco Feasability
« Reply #6 on: May 02, 2014, 07:46:54 pm »
Picco mini rim on right 

Offline Cut4fun .

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 23708
  • Karma: 664
  • OHIO REDNECK Saw Repair Getter Done
    • Redneck Chainsaw Repair

  • Total Badges: 53
    Badges: (View All)
    Tenth year Anniversary Nineth year Anniversary Level 8 Apple User Eighth year Anniversary 20000 Posts
Re: .325 to 3/8 Picco Feasability
« Reply #7 on: May 02, 2014, 07:49:26 pm »
More info dug up. NOT ME = Got my new P-7 rim mounted on the 024 just waiting now for my 3003-000-6313 bar and chain to arrive in the mail.

Offline RoyM

  • Gas Hotsaw
  • ******
  • Posts: 502
  • Karma: 45
  • Location: Surrey British Columbia

  • Total Badges: 21
    Badges: (View All)
    Level 5 500 Posts Fourth year Anniversary Third year Anniversary Karma Good Level 4
Re: .325 to 3/8 Picco Feasability
« Reply #8 on: May 02, 2014, 10:23:36 pm »
A properly tuned 40 cc 024 has enough power to pull a sharp .325, the 35 cc MS200 does better with the less aggressive chain. It is worth a try.
Old age and treachery always overcome youth and enthusiasm

Offline 3000 FPS

  • Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 4706
  • Karma: 320
  • Location: Carpenter, Wyoming

  • Total Badges: 43
    Badges: (View All)
    Tenth year Anniversary Nineth year Anniversary Level 7 Eighth year Anniversary Seventh year Anniversary Sixth year Anniversary
Re: .325 to 3/8 Picco Feasability
« Reply #9 on: May 02, 2014, 10:42:34 pm »
If it were me I would take a bar that is 3/8 Lo pro and then modify it to fit your saw.   

I have some bars that I modified the crap out of and they work just fine.

You can take your original bar and use it as a pattern for all the mods you would need to make.
PP 505, 475, 445.

 

Related Topics

  Subject / Started by Replies Last post
185 Replies
13012 Views
Last post November 06, 2016, 12:22:58 pm
by HolmenTree
0 Replies
341 Views
Last post July 28, 2011, 01:27:28 pm
by mweba
44 Replies
3070 Views
Last post January 24, 2017, 11:05:17 pm
by HolmenTree
22 Replies
1179 Views
Last post December 26, 2015, 09:04:59 pm
by jmester
8 Replies
548 Views
Last post January 07, 2016, 08:08:04 pm
by 3000 FPS
2 Replies
340 Views
Last post June 03, 2018, 05:29:02 pm
by Cut4fun .