Original Hardin Marine Logs/Snails OR Mercruiser 4" Center Riser Exhaust

  • 5 Replies
  • 298 Views

bvparr

  • Join Date: Apr 2012
  • Location: Las Vegas, Nevada
  • *
  • Newbie
  • *
  • Posts: 7
  • Karma: +0/-0
  • Registered User
    • View Profile
  • Liked:
  • Likes Given: 4
« on: April 13, 2019, 11:43:39 AM »
Hello - Just looking for a little help.  Just had a mild 454 built for my Hawaiian.  It's .40 over and a full roller.  Mild cam by SLR.  So here is where I am at - I have the original Hardin Marine logs and snails that came with the 1978 boat.  They are in great shape.  I also have the Mercruiser 89011 exhaust manifolds with the 816900-C 4" risers.  They are also in great shape.  The question is if they are your ONLY choices - what ones would you use? 



mash on it

  • Join Date: Sep 2008
  • Location: BHC- Beyond Hell Crew & Williams
  • *
  • Macho Member
  • ******
  • Posts: 1,807
  • Karma: +20/-0
  • At the Saloon 'til sun up
    • View Profile
  • Liked:
  • Likes Given: 412
« Reply #1 on: April 13, 2019, 12:38:02 PM »
If interior room or doghouse is not a problem, merc manifolds.

Merc manifolds are heavy, compared to logs and snails.

Logs and snails are not as bad as people think.

Dan'l
CJ/RR 212...under construction  "Pistol Annie"

bvparr

  • Join Date: Apr 2012
  • Location: Las Vegas, Nevada
  • *
  • Newbie
  • *
  • Posts: 7
  • Karma: +0/-0
  • Registered User
    • View Profile
  • Liked:
  • Likes Given: 4
« Reply #2 on: April 13, 2019, 06:06:37 PM »
Oh that's right - I need to make sure there is room under the hatch.  Thank you for your input.

Tahoe540

  • Join Date: Aug 2018
  • Location: Sparks
  • *
  • Newbie
  • *
  • Posts: 7
  • Karma: +0/-0
  • Registered User
    • View Profile
  • Liked:
  • Likes Given: 1
« Reply #3 on: April 17, 2019, 07:29:35 AM »
I am repowering my jet boat and have no room but for anything but log exhaust because of the doghouse/engine cover.  This is very limiting on a 555 BBC.  You can cut off the ends I guess to get a full 3"?
  • Boat #1: 1984 Hallett BR
  • Boat #2: 1990 Advantage offshore

bvparr

  • Join Date: Apr 2012
  • Location: Las Vegas, Nevada
  • *
  • Newbie
  • *
  • Posts: 7
  • Karma: +0/-0
  • Registered User
    • View Profile
  • Liked:
  • Likes Given: 4
« Reply #4 on: April 17, 2019, 09:02:54 AM »
Yes.  I did that to them already.  So if the risers do not fit that is what I am going to put on. 

el mojado

  • Join Date: Sep 2011
  • Location: p town
  • *
  • Hero Member
  • *****
  • Posts: 1,083
  • Karma: +15/-0
    • View Profile
  • Liked:
  • Likes Given: 7
« Reply #5 on: April 24, 2019, 10:55:17 AM »
My $.02
When I cut off mine I noticed there was a small lip just on the inside. I took my air grinder with a carbide bit and ground it off to get as much of an exit as possible. Every bit counts.

Sent from my SM-G950U using SoCal Jet Boats mobile app

I once tried to NOT have a good time. It just didn't work out!

 


Website Security Test
Powered by EzPortal

Website Security Test