Go Back  Offshoreonly.com > Technical > General Q & A
Any Experience with HCX mufflers >

Any Experience with HCX mufflers

Notices

Any Experience with HCX mufflers

Old 08-12-2020, 10:47 AM
  #1  
Registered
Thread Starter
 
Join Date: Oct 2010
Location: Cheboygan, MI
Posts: 1,151
Received 50 Likes on 40 Posts
Default Any Experience with HCX mufflers

I want to dump my Gibson exhaust for something more free flowing that will take some of the bark out of my exhaust. Without mufflers I don't just scare the kids, I scare the adults too. I saw these on the CP site and wondered if anyone has tried them.
https://www.cpperformance.com/c-472-...silencers.aspx
ThisIsLivin is offline  
Old 08-12-2020, 11:15 AM
  #2  
SB
Registered
iTrader: (1)
 
Join Date: Nov 2004
Location: On A Dirt Floor
Posts: 10,543
Received 248 Likes on 138 Posts
Default

Worst mufflers for performance ever. Back in the day when people where using these, even 400hp motors losing 400-600rpm.

Brutal.
Way cheaper with exact same results to stick huge potatoes in there. Lolol



SB is offline  
Old 08-12-2020, 01:39 PM
  #3  
Registered
Thread Starter
 
Join Date: Oct 2010
Location: Cheboygan, MI
Posts: 1,151
Received 50 Likes on 40 Posts
Default

Originally Posted by SB View Post
Worst mufflers for performance ever. Back in the day when people where using these, even 400hp motors losing 400-600rpm.

Brutal.
Way cheaper with exact same results to stick huge potatoes in there. Lolol


I was looking at the straight through offshore version.
ThisIsLivin is offline  
Old 08-12-2020, 01:45 PM
  #4  
Forum Regulator
VIP Member
iTrader: (1)
 
Sydwayz's Avatar
 
Join Date: May 2001
Location: Worldwide
Posts: 22,901
Received 101 Likes on 53 Posts
Default

Originally Posted by SB View Post
Worst mufflers for performance ever. Back in the day when people where using these, even 400hp motors losing 400-600rpm.

Brutal.
Way cheaper with exact same results to stick huge potatoes in there. Lolol


Just to add, even though that's not what the OP was asking about...

When I was running those on my pair of 496HOs; that was not my experience at all. I lost maybe 200RPM and 1, maybe 2MPH.
That type of slip in "quieter" was just enough to take the bark off, and didn't draw so much attention on a lake that we frequented; that had a recent go-fast boat in a bad DUI incident with fatalities. I would just put them in for time on that lake only, and eventually they just stayed in a box in the garage when scrutiny wasn't so bad on said lake.
Your mileage may vary.
Sydwayz is offline  
Old 08-12-2020, 02:13 PM
  #5  
Registered
Thread Starter
 
Join Date: Oct 2010
Location: Cheboygan, MI
Posts: 1,151
Received 50 Likes on 40 Posts
Default



I should have included the picture to begin with. This is the style I am considering. I'm mostly out on Lake Huron and don't need anything out there. When I go down the river it will echo between the houses.
ThisIsLivin is offline  
The following users liked this post:
Sydwayz (08-12-2020)
Old 09-06-2020, 06:02 PM
  #6  
Registered
 
Join Date: Sep 2013
Posts: 50
Likes: 0
Received 0 Likes on 0 Posts
Default

I'd be curios about these also. Anyone have experience with these. Just built new engines and idle bark is loud also.
viking60 is offline  
Old 09-08-2020, 07:01 PM
  #7  
Registered
 
Join Date: Nov 2019
Location: Somerset ma
Posts: 73
Received 8 Likes on 8 Posts
Default

Are those hcx silencers like a straight through baffle? They only show a side profile.
Ratty206ls is offline  
Old 09-08-2020, 11:41 PM
  #8  
Registered
 
Join Date: Jun 2011
Posts: 1,052
Received 19 Likes on 16 Posts
Default

Originally Posted by Sydwayz View Post
Just to add, even though that's not what the OP was asking about...

When I was running those on my pair of 496HOs; that was not my experience at all. I lost maybe 200RPM and 1, maybe 2MPH.
That type of slip in "quieter" was just enough to take the bark off, and didn't draw so much attention on a lake that we frequented; that had a recent go-fast boat in a bad DUI incident with fatalities. I would just put them in for time on that lake only, and eventually they just stayed in a box in the garage when scrutiny wasn't so bad on said lake.
Your mileage may vary.
I lost 400 rpm using these slip ins with a 377 inch SBC. They dropped idle noise by 6 dB. The GBB slip ins dropped 6 dB at idle but no loss in rpm (spun the motor about 400 rpm more than with the CP inserts. The CP inserts now decorate my garage floor.
Trash is offline  
The following users liked this post:
SB (09-15-2020)
Old 09-15-2020, 05:16 PM
  #9  
Registered
Thread Starter
 
Join Date: Oct 2010
Location: Cheboygan, MI
Posts: 1,151
Received 50 Likes on 40 Posts
Default

I gave up on mufflers. Now that I can get it to idle at 650 rpm down the river, I pulled the mufflers off and will hope for the best.
ThisIsLivin is offline  
Old 09-15-2020, 06:03 PM
  #10  
Registered
 
Join Date: Oct 2012
Posts: 1,439
Received 41 Likes on 25 Posts
Default

See if you can find a set of ggb inserts. No loss of power and takes the bark out.
underpsi68 is offline  

OSO Sponsor
OSO Advertiser
OSO Advertiser

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.

OSO Advertiser