Go Back  RCU Forums > Glow Engines, Gas Engines, Fuel & Mfg Support Forums > Gas Engines
Reload this Page >

3W 106QS keeps blowing out canisters.

Notices
Gas Engines Questions or comments about gas engines can be posted here

3W 106QS keeps blowing out canisters.

Old 08-05-2006, 03:58 PM
  #1  
wgdenge
Thread Starter
My Feedback: (5)
 
Join Date: Jun 2004
Location: Evans, GA
Posts: 45
Received 0 Likes on 0 Posts
Default 3W 106QS keeps blowing out canisters.

Anyone know what might be going on.
I have had to get 3 new canisters from 3W because my 106QS keeps blowing out the back.

The canisters are the Pefa MS size. They sound and run great, but after 20 or so flights one of them
seems to blow out the back in a perfect circle.

Should I lengthen the headers to move the exhaust wave forward in the can.?
If so, how should I lengthen it.?

Here is a pic.

Cheers,
wayne
Attached Thumbnails Click image for larger version

Name:	Jh15045.jpg
Views:	9
Size:	44.4 KB
ID:	502081  
Old 08-05-2006, 04:43 PM
  #2  
pe reivers
Senior Member
 
Join Date: Jan 2002
Location: Arcen, , NETHERLANDS
Posts: 6,571
Likes: 0
Received 1 Like on 1 Post
Default RE: 3W 106QS keeps blowing out canisters.

You are running a very high exhaust gas temperature. This softens the aluminum.
Try opening the needles a bit more, and provide ample cooling for the cans.
Old 08-05-2006, 05:05 PM
  #3  
flyinrazrback
Senior Member
My Feedback: (69)
 
flyinrazrback's Avatar
 
Join Date: Jul 2002
Location: Fort Smith, AR
Posts: 3,778
Likes: 0
Received 0 Likes on 0 Posts
Default RE: 3W 106QS keeps blowing out canisters.

Are you running the headers the length they came, or have you cut them at all?
Old 08-05-2006, 06:07 PM
  #4  
wgdenge
Thread Starter
My Feedback: (5)
 
Join Date: Jun 2004
Location: Evans, GA
Posts: 45
Received 0 Likes on 0 Posts
Default RE: 3W 106QS keeps blowing out canisters.

The headers are the original length from 3W.

wayne
Old 08-05-2006, 10:23 PM
  #5  
flyinrazrback
Senior Member
My Feedback: (69)
 
flyinrazrback's Avatar
 
Join Date: Jul 2002
Location: Fort Smith, AR
Posts: 3,778
Likes: 0
Received 0 Likes on 0 Posts
Default RE: 3W 106QS keeps blowing out canisters.

what are your engine temps?
Old 08-05-2006, 10:46 PM
  #6  
pizza
Senior Member
My Feedback: (24)
 
pizza's Avatar
 
Join Date: Oct 2002
Location: salt lake city, UT,
Posts: 380
Likes: 0
Received 0 Likes on 0 Posts
Default RE: 3W 106QS keeps blowing out canisters.

alum burns at 800d carbon fiber burns at 3000d I would switch to cf they are much lighter and nothing ratles or comes loose or burns out. they are only slightly more money but will last forever.
Old 08-06-2006, 04:12 AM
  #7  
pe reivers
Senior Member
 
Join Date: Jan 2002
Location: Arcen, , NETHERLANDS
Posts: 6,571
Likes: 0
Received 1 Like on 1 Post
Default RE: 3W 106QS keeps blowing out canisters.

Bollocks!
The carbon fibre may stand up to those high temperatures, but the resin that holds the fibres together won't, unless you have the fibres in a ceramic matrix. (I take it that the "d" means °F)
Old 08-06-2006, 10:57 PM
  #8  
Dan767
My Feedback: (19)
 
Dan767's Avatar
 
Join Date: Apr 2003
Location: Federal Way, WA
Posts: 504
Likes: 0
Received 0 Likes on 0 Posts
Default RE: 3W 106QS keeps blowing out canisters.

Could it be that they are being blown out, not burned out? Is the mixture set a little rich, and do you hear the engine "popping" when you close the throttle?
Old 08-07-2006, 04:32 AM
  #9  
Supermod56
My Feedback: (36)
 
Join Date: May 2004
Location: Nampa, ID
Posts: 308
Likes: 0
Received 0 Likes on 0 Posts
Default RE: 3W 106QS keeps blowing out canisters.

Strange, but I have had several Pefa's that weren't put together right and the ends came off, had to weld them up. They should have stuck with the rivets like the old ones. Not saying that's the problem, but I find it hard to believe that it could blow the end off, maybe, but I doubt it. You could try a set of MTW's and see what happens.

Tom
Old 08-07-2006, 02:01 PM
  #10  
3D Joy
Senior Member
 
3D Joy's Avatar
 
Join Date: Dec 2002
Location: , QC, CANADA
Posts: 1,083
Likes: 0
Received 0 Likes on 0 Posts
Default RE: 3W 106QS keeps blowing out canisters.

I may be wrong but my experience tells me that a richer setting causes the muffler to run hotter. This being because the gas mix takes more time to burn completely and reaches the canister before being completely burnt.

Only a guess...

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.