Like Tree0Likes

Which ones louder Gibson or CMI mufflers

Reply
Old 06-25-2007, 06:12 PM
  #1
Registered
Thread Starter
 
Join Date: Aug 2005
Location: Las Vegas
My Boats: 1999 270S Hallett
Posts: 207
Default Which ones louder Gibson or CMI mufflers

I have a new supercharged 540 being built for my hallett and need some new mufflers. I currently own some IMCO mufflers however they are not rated for the 750hp that I'm expecting. I was thinking on getting the Gibson bulletts with external flappers or the CMI mufflers. My IMCO mufflers set in the water 1 to 1 1/2" inches at idle and I need some protection from possible water indigestion.

Does anyone know which muffler is quieter at cruising speed (45 - 55)? I can get the CMI for about $950 and the Gibson are a lot less at $570. I just wanted to get the quieter muffler for my wife even though both are gong to be too loud for her.

Any suggestions????
VegasHallett is offline  
Reply With Quote
Old 06-27-2007, 12:19 AM
  #2
Registered
Thread Starter
 
Join Date: Aug 2005
Location: Las Vegas
My Boats: 1999 270S Hallett
Posts: 207
Default

ttt
VegasHallett is offline  
Reply With Quote
Old 06-27-2007, 10:49 AM
  #3
Platinum Member
Platinum Member
 
HUSTLEthis's Avatar
 
Join Date: Nov 2001
Location: Laguna Beach,Ca.
Posts: 793
Default

How 'bout IMCO Gatlins....
HUSTLEthis is offline  
Reply With Quote
Old 06-27-2007, 02:13 PM
  #4
Registered
 
epeek's Avatar
 
Join Date: Apr 2003
Location: Lake George N.Y.
My Boats: 35 Fountain Executioner
Posts: 1,530
Default

Gibsons...hand down. The CMI open mechaically at speed.
Almost as loud as open exhaust.
epeek is offline  
Reply With Quote
Old 06-27-2007, 07:43 PM
  #5
Registered
Thread Starter
 
Join Date: Aug 2005
Location: Las Vegas
My Boats: 1999 270S Hallett
Posts: 207
Default

Quote:
Originally Posted by HUSTLEthis View Post
How 'bout IMCO Gatlins....
I need protection from water ingestion due to standard risers and the exhaust mufflers will be touching the water at idle. I can either run Bullets with rubber flaps flaps or CMI's.

I called some vendors and they all say CMI is a little quiter but no one has hard data.
VegasHallett is offline  
Reply With Quote
Old 06-27-2007, 08:07 PM
  #6
'05 Concept SF23
VIP Member
 
Join Date: May 2002
Location: Gladeville, TN
My Boats: 2006 Concept 23
Posts: 1,687
Default

Have you looked at GGB. I run them on 600 CU IN NA engines. They are full time and really cut the noise down with no loss of power.
f311fr1 is offline  
Reply With Quote
Old 06-28-2007, 01:25 AM
  #7
Registered
Thread Starter
 
Join Date: Aug 2005
Location: Las Vegas
My Boats: 1999 270S Hallett
Posts: 207
Default

Quote:
Originally Posted by f311fr1 View Post
Have you looked at GGB. I run them on 600 CU IN NA engines. They are full time and really cut the noise down with no loss of power.
GGB mufflers do not have precautions for water intake, no flaps or mechanical device to prevent damage to the motor.

Or am I wrong?
VegasHallett is offline  
Reply With Quote
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
dana marine products
New Products and Member Discounts
4
08-22-2009 08:18 AM
TeamSaris
General Boating Discussion
4
07-20-2007 10:00 PM
MikeFormula
General Boating Discussion
15
06-06-2007 03:08 PM
teaguecustommarine
New Products and Member Discounts
0
08-28-2006 07:53 PM
damdonzi
General Boating Discussion
6
04-21-2006 04:18 PM



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 01:58 AM.


Copyright 2011 OffShoreOnly. All rights reserved.