Like Tree0Likes

Blower Question

Reply
Old 06-11-2002, 11:46 AM
  #1
ssherman
Guest
 
Posts: n/a
Default Blower Question

What is the reasoning behind the placement of the idler pully on a blower set up? I see some on the inside of the belt and others on the outside?
 
Reply With Quote
Old 06-11-2002, 12:20 PM
  #2
Registered
 
Brad Zastrow's Avatar
 
Join Date: Jun 2001
Location: McHenry, Illinois
Posts: 2,244
Default

Not really sure what you are asking. Ther are number of different types of blowers and belts. And typically idlers are for adjusting the tension on the belt.
Brad Zastrow is offline  
Reply With Quote
Old 06-11-2002, 12:28 PM
  #3
Platinum Member
Platinum Member
Platinum Member
 
laster's Avatar
 
Join Date: Oct 2000
Location: Western Massachusetts
My Boats: 1996 Progression 24LD
Posts: 377
Default

I have no idea how they decide which way to go. However, in general, idlers on the outside cause the belt to wrap further around the pulleys giving better grip for the belt and idlers in the inside cause less deflection of the belt giving (slightly) less resistance or drag. Does that help?
laster is offline  
Reply With Quote
Old 06-11-2002, 12:48 PM
  #4
Registered
 
Join Date: Dec 2000
Location: Flemington, N.J. U.S.A
Posts: 2,164
Default

I don't think it matters . My 8-71's are inside the belt pushing out but my belt is short so it only pushes out a very little bit . I have seen them both ways . If it is inside ,the ideler probably wears the belts teeth a little quicker .If it's outside, then it rubs the outside if the belt and makes it look scuffed up .Just my opinion .
boot is offline  
Reply With Quote
Old 06-11-2002, 12:54 PM
  #5
ssherman
Guest
 
Posts: n/a
Default

Thanks for the help guys I kinda figured there was no right or wrong way as I have seen them both ways from the same engine builder.

Kinda like the question of what determines the rotation of the center drive on a triple engine application.
 
Reply With Quote
Old 06-11-2002, 01:09 PM
  #6
Registered
 
28SS's Avatar
 
Join Date: Sep 2001
Location: Shelby Township MI
My Boats: 1976 cigarette 28ss
Posts: 213
Default

The obvious is for belt tension. the next issue is getting belt wrap.
which is surface area of belt to pulley. so design configuration dictates position of idler
28SS is offline  
Reply With Quote
Old 06-11-2002, 01:14 PM
  #7
Registered
Platinum Member
 
Join Date: Jan 2001
Location: PA and MD
My Boats: fuel injection, superchargers
Posts: 1,449
Default

As the engine revs the belt will have a tendency to 'grow'/ stretch. If the idler is on the inside pushing out it will 'help' it grow and loosen and unwrap. With the idler on the outside pushing in it will tighten and increase wrap. I believe outside pushing in is the best if your configuration will allow it.
cobra marty is offline  
Reply With Quote
Old 06-11-2002, 03:16 PM
  #8
Registered
 
Join Date: Oct 2000
Location: claymont, DE, USA
My Boats: 2003 Single 32 Dominator
Posts: 486
Default

When the belt pushes in, which is the best way for the wrapping reason, it's because there's room to do it.

Alot of the time when the belt is pushed out, it's cause there's something in the way.

DAVE
Dave F is offline  
Reply With Quote
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
ubet28
General Q & A
13
07-18-2008 02:10 PM
Quaid24
General Boating Discussion
0
03-26-2007 09:14 PM
nocigarette
General Q & A
17
10-07-2006 05:29 PM
drewwilliams
General Q & A
7
06-08-2006 07:45 PM
puder
General Q & A
17
02-27-2002 09:56 AM



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
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 09:21 AM.


Copyright 2011 OffShoreOnly. All rights reserved.