Go Back  Offshoreonly.com > General Discussion > General Boating Discussion
HP500 Rebuild - Exhaust Question >

HP500 Rebuild - Exhaust Question

Notices
General Boating Discussion

HP500 Rebuild - Exhaust Question

Thread Tools
 
Old 09-06-2014 | 08:01 AM
  #1  
Thread Starter
Registered
 
Joined: Aug 2012
Posts: 279
Likes: 0
From: Grand Rapids, MI
Default HP500 Rebuild - Exhaust Question

Guys,

I recently blew one of my Merc HP500's in my 33 foot Scarab on Lake Michigan and am going to have Dave Wesseldyke at Wesco Racing Engines rebuild them this offseason. Not exactly sure what happened inside the motors yet (they'll be torn down in the next few weeks), but I'm basically planning on putting in all new parts and doing it right so I don't have problems down the line because I went cheap....

The boat currently has gil exhaust. It's one of the better sounding boats at idle, but isn't loud enough for my taste once you get going. I'd like to change this, but considering I'm going to spend big dollars on the rebuilds, my wife might kill me if I spend tons more on exhaust!!

I'm learning a TON through this site (and through breaking stuff and having to fix them....damn it), but don't know much about exhaust.

Any recommendations? Anything I can do without screwing the bank account that will add some bark to it?
chris21hope is offline  
Reply
Old 09-06-2014 | 08:51 AM
  #2  
SB
Registered
20 Year Member
 
Joined: Nov 2004
Posts: 14,090
Likes: 3,681
From: On A Dirt Floor
Default

Turn the pipe's around so they face you. LOL.

You do realize most of the noise heard by your boat are from those not one your boat right ?

If you have no mufflers/baffles installed, all you can do is introduce the water farther downstream in the exhaust......or of course go dry, but that may drive you bezerk along with others not on your boat.

Last edited by SB; 09-06-2014 at 08:53 AM.
SB is offline  
Reply
Old 09-06-2014 | 09:00 AM
  #3  
Registered
20 Year Member
 
Joined: Jan 2006
Posts: 3,598
Likes: 1,168
From: taxachusetts
Default

Originally Posted by chris21hope
Guys

The boat currently has gil exhaust. It's one of the better sounding boats at idle, but isn't loud enough for my taste once you get going. I'd like to change this,

Any recommendations? Anything I can do without screwing the bank account that will add some bark to it?
to make your exhaust louder,remove the condensation plates between tailpipes and manifolds.
sutphen 30 is offline  
Reply
Old 09-06-2014 | 04:55 PM
  #4  
Thread Starter
Registered
 
Joined: Aug 2012
Posts: 279
Likes: 0
From: Grand Rapids, MI
Default

[QUOTE=SB;4183917]Turn the pipe's around so they face you. LOL.

Great idea! My boat has an integrated fiberglass swim platform that directs most of the sound towards the back of the boat, and makes it quieter in the boat. Still, it's not that loud outside the boat. A good example is at 2:40 in this video taken from someone on the pier at Boyne Thunder. When I hammer down, it's not loud enough!

https://www.youtube.com/watch?v=hBxvTQQ2QL8
chris21hope is offline  
Reply
Old 09-06-2014 | 04:56 PM
  #5  
Thread Starter
Registered
 
Joined: Aug 2012
Posts: 279
Likes: 0
From: Grand Rapids, MI
Default

Originally Posted by sutphen 30
to make your exhaust louder,remove the condensation plates between tailpipes and manifolds.
Thanks - I don't know much about that, and will check into it.
chris21hope is offline  
Reply

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



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.