Author Topic: No muffler  (Read 526 times)

0 Members and 0 Guests are viewing this topic.

Offline man of stihl

  • Nitro Hotsaw
  • *******
  • Posts: 1219
  • Karma: 71
  • NW PA
  • Location: nw pennsylvania
No muffler
« on: November 29, 2011, 03:34:49 pm »
Has anyone ever did a time comparison on a ported saw with a opened up muffler and no muffler at all? I raced against a guy last summer that did not use a muffler. And he does very well actually.
Ron

Social Buttons


Offline Al Smith

  • Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 2573
  • Karma: 132
Re: No muffler
« Reply #1 on: November 30, 2011, 01:09:13 pm »
Meaning he ran it coming out of the cylinder without anything or with just a short stub of a pipe ?

Generally speaking straight out the cylinder they have to be set extremely rich to idle ,like blowing black smoke .In doing so they load up and don't spool up to speed right .

I've seen muffler race saws that had nearly all the front of the muffler carved out but they were running big Tillotson model HL carbs with double pumper diphragms as to get just oodles of fuel through them . Most standard saws use just a large enough carb to be ample to supply enough fuel under standard run condition .Often times an open exhaust will in essence "over run " the carb in other words provide no back pressure and thus the engine draws more fuel than the carb can supply .

I tried a cut out front muffler on one of my 038 Mags that runs real well for what it's  design is .It did in fact over run the Bing carb and didn't do as well as I thought it should have .

Another example is an old gear drive Mac that I used to run open .That thing would blow black smoke as though it were burning old tires .Then huff and puff hiccup and fart until it got all that fuel cleared out while under load .All this took  about 5 seconds then it was like an after burner on a jet kicked in .Took off like cat that had been turpentined with a corn  cob .

Offline man of stihl

  • Nitro Hotsaw
  • *******
  • Posts: 1219
  • Karma: 71
  • NW PA
  • Location: nw pennsylvania
Re: No muffler
« Reply #2 on: November 30, 2011, 02:37:02 pm »
He had nothing bolted to his cylinder. He didn't have to worry about idling either because it was a cold start race. Wide open from start to finish.
Ron

Offline Cut4fun .

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 18107
  • Karma: 342
  • OHIO REDNECK Saw Repair Getter Done
    • Redneck Chainsaw Repair
Re: No muffler
« Reply #3 on: November 30, 2011, 02:47:25 pm »
Lot of shows have rule in place for muffler must be on saw. Thats why you see gutted shells on the stock appearing saws. No muffler just a shell straight out.

What was the rules for this show and was it a gas or alky saw? PM me the show if you dont know and I will give it a look see.  ;)
REDNECK Saw Repair Getter Done

Offline Stihlboy

  • 3 cube
  • *
  • Posts: 14
  • Karma: 1
Re: No muffler
« Reply #4 on: June 18, 2012, 10:26:24 pm »
my wildthing has no muffler at all and it runs good, revs quick too

 

Related Topics

  Subject / Started by Replies Last post
68 Replies
2165 Views
Last post December 19, 2015, 05:37:53 pm
by Cut4fun .
9 Replies
5337 Views
Last post November 18, 2011, 06:29:34 pm
by brokenbudget
31 Replies
1358 Views
Last post December 27, 2011, 08:35:28 pm
by man of stihl
24 Replies
814 Views
Last post April 07, 2012, 02:48:31 pm
by krbeave
2 Replies
406 Views
Last post December 13, 2012, 10:35:00 am
by Chris J.
Muffler

Started by jmester Stihl

3 Replies
264 Views
Last post January 15, 2013, 08:05:01 pm
by jmester
muffler tech

Started by doreadeal « 1 2 3 » Poulan

23 Replies
510 Views
Last post December 04, 2013, 08:59:23 pm
by doreadeal
9 Replies
1017 Views
Last post October 23, 2013, 09:18:26 pm
by Cut4fun .
10 Replies
604 Views
Last post October 29, 2013, 08:22:58 am
by Adirondackstihl
8 Replies
293 Views
Last post November 14, 2013, 12:31:50 am
by 3000 FPS