Like Tree0Likes

Muffler Advice Needed

Reply
Old 06-06-2005, 09:20 AM
  #1
Registered
Thread Starter
 
Phantom1's Avatar
 
Join Date: Nov 2002
Location: Lake Murray, SC
My Boats: 30' Phantom
Posts: 5,647
Default Muffler Advice Needed

I've been reading the various threads regarding mufflers and would like some advice concerning my specific set up. I have a 540 with CMI dry Big Tube headers. I don't know the current decibel reading, but I need to do something.

Please give me your thoughts, especially concerning dry exhaust.

Thanks-
Attached Thumbnails
Muffler Advice Needed-drive2.jpg   Muffler Advice Needed-mvc-012f.jpg  
Attached Images
 
Phantom1 is offline  
Reply With Quote
Old 06-06-2005, 10:32 AM
  #2
Banned
 
Join Date: Dec 2003
Location: st. louis,mo.
Posts: 1,647
Default Re: Muffler Advice Needed

Depending on where you are in decibel numbers now there is really only 2 companies making legal mufflers for blower motors over 750hp. cmi and hpi for your dry application., We have been working with several muffler companies at loto. using nortech 850's the cmi new noise elimination system will comply with 90decibels, hpi has a slide in that they are fine tuning that I believe will work. Nortech 1150's dry we are doing [email protected] on now and will have answers within a week. will let you know. jim midwest performance marine loto--- 636 236-4141
Buddy OO is offline  
Reply With Quote
Old 06-06-2005, 11:14 AM
  #3
Registered
Thread Starter
 
Phantom1's Avatar
 
Join Date: Nov 2002
Location: Lake Murray, SC
My Boats: 30' Phantom
Posts: 5,647
Default Re: Muffler Advice Needed

Thanks Jim. Please note that my engine is naturally aspirated though.
Phantom1 is offline  
Reply With Quote
Old 06-06-2005, 12:48 PM
  #4
Registered
 
Lofty's Avatar
 
Join Date: Jan 2004
Location: Bay Area, CA
My Boats: Sunseeker Superhawk 50', Regal 42', Fountain 32', Dan Arena 21XL Custom, Revolution SST-45,
Posts: 3,246
Default Re: Muffler Advice Needed

GGB's will work but you'll have to dump some water through the muffler or to help and also to prevent ther flapper from burning.
Lofty is offline  
Reply With Quote
Old 06-06-2005, 03:51 PM
  #5
RLW
~~~~
Charter Member
 
Join Date: Oct 2000
Location: Western New York
Posts: 1,451
Default Re: Muffler Advice Needed

I am running KE exhaust with GGB's on a N/A 540.
I am told it takes the bark out of the exhaust note. This being observed from the dock when I do a fly-by.
When I first ran them on the hose, this spring, I didn't really notice anything different until the water started coming out of the mufflers.
Unbelievable difference.
Mind you, I was in the cockpit when I was listening to the exhaust. It was very noticeable soon as the water made contact with the GGB's.
I would like to get a "db" reading to see where I am in regards to the new law that seems to be sweeping the country.
RLW is offline  
Reply With Quote
Old 06-06-2005, 04:47 PM
  #6
Banned
 
Join Date: Dec 2003
Location: st. louis,mo.
Posts: 1,647
Default Re: Muffler Advice Needed

just talked to ggb, they now have the tooling for there new 6" dry muffler, will be ready next week and down to loto for testing. will let you guys know
Buddy OO is offline  
Reply With Quote
Old 06-07-2005, 10:05 AM
  #7
Registered
Thread Starter
 
Phantom1's Avatar
 
Join Date: Nov 2002
Location: Lake Murray, SC
My Boats: 30' Phantom
Posts: 5,647
Default Re: Muffler Advice Needed

Quote:
Originally Posted by wiggler4490
just talked to ggb, they now have the tooling for there new 6" dry muffler, will be ready next week and down to loto for testing. will let you guys know
Thanks. I look forward to hearing the results.
Phantom1 is offline  
Reply With Quote
Old 06-07-2005, 03:33 PM
  #8
Registered
 
blue thunder's Avatar
 
Join Date: Nov 2001
Location: Pennsylvania
My Boats: 330 Carver 30' Scarab Panther 17' ProV Lund
Posts: 3,359
Default Re: Muffler Advice Needed

Quote:
Originally Posted by RLW
I am running KE exhaust with GGB's on a N/A 540.
I am told it takes the bark out of the exhaust note. This being observed from the dock when I do a fly-by.
When I first ran them on the hose, this spring, I didn't really notice anything different until the water started coming out of the mufflers.
Unbelievable difference.
Mind you, I was in the cockpit when I was listening to the exhaust. It was very noticeable soon as the water made contact with the GGB's.
I would like to get a "db" reading to see where I am in regards to the new law that seems to be sweeping the country.
Are the GGB's an insert RLW? I am running the KEs dry and need to address db as well. On a side note RLW, did you get what you were looking for in the KEs?

BT
blue thunder is offline  
Reply With Quote
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
betitbig
General Q & A
21
02-28-2006 04:37 PM
IRONMAN
General Q & A
8
12-29-2005 01:39 PM
flash_e
Fountain
18
06-08-2005 03:03 PM
c5marine
General Boating Discussion
17
03-08-2005 09:29 AM
CHAOS REIGNS
General Q & A
15
02-28-2003 02:24 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 01:35 AM.


Copyright 2011 OffShoreOnly. All rights reserved.