Soft wall vs. hard wall wet exhaust hose.

Discussion in 'Inboards' started by missinginaction, Jun 13, 2012.

  1. missinginaction
    Joined: Aug 2007
    Posts: 793
    Likes: 78, Points: 28, Legacy Rep: 512
    Location: New York

    missinginaction Senior Member

    I did a search but did not find anything on this topic.

    I'm in the final stages of a restoration of a 1973 Silverton sedan. As part of this project I've refreshed a low hours 302 Ford and replaced the old cast iron mufflers with Centek Vernatone mk II's.

    Since it's a v-drive the exhaust runs are short, no more than about 18 inches.

    Does anyone know the advantages of hard wall hose vs. short wall? The runs to the transom are straight and the only bends would be very slight.

    Any input would be appreciated.

    Thanks,

    MIA
     
  2. keysdisease
    Joined: Mar 2006
    Posts: 794
    Likes: 43, Points: 28, Legacy Rep: 324
    Location: South Florida USA

    keysdisease Senior Member

    Do you mean with or without wire reinforcement or corrugated vs smooth?

    For such a short straight run I would use exhaust rated smooth no wire hose like the 200 series here:

    http://www.teleflexmarine.com/products/hose/engine-hose/

    or the 110-200 series here:

    http://www.tridentmarine.com/stage/wetex_hose.htm

    You could move up to silicone as a upgrade, and for small lengths the cost might not hurt too much. I don't like wire in exhaust, I've seen too much of it rust or corrode and cause issues. It's fine on intakes to reduce chance of collapse but exhaust gasses are like way corrosive:eek:.

    Steve
     
    1 person likes this.
  3. missinginaction
    Joined: Aug 2007
    Posts: 793
    Likes: 78, Points: 28, Legacy Rep: 512
    Location: New York

    missinginaction Senior Member

    Thanks for the reply Steve,

    That Teleflex site is very helpful.

    I'd probably use hose without wire reinforcement. Seems to me that wire prevents collapse under vacuum but this hose is under pressure and not a lot of it. The boats set up for twin mufflers and with 3 inch I.D. hose there won't be much back pressure on the system.

    I'd probably use smooth wall. I was just curious as to why there are two different types, hard wall and soft.

    I'm trying to decide which to buy.

    MIA
     

  4. Frosty

    Frosty Previous Member

    Wire stops kinking. Carry on with your smooth wall.
     
    1 person likes this.
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.