Does anyone know who made the aluminum pipe between turbo and muffler. My boat is a 88 46 with 550 hp 692s thanks
I do not know who made them. I have 71's that also had aluminum pipes. I began to see little piles of aluminum dust beneath the pipes. I replaced them with stainless steel from DeAngelo Marine Exhaust. I also replaced the cast iron mixing elbows at that time, again with stainless from DeAngelo. I shipped them the old mixing elbows and exhaust tube. They made me replacements. The cost for two engines was around $ 2,400.00 in 2014. The were done on time and shipped on time and fit as promised. I would use them again. I replaced my turbos at the same time. I have a friend that replaced his aluminum tubes with fiberglass exhaust tubes. He made the offsets himself and they seemed to work out very well for him.
I did the same thing using Metcalf, Fort Lauderdale. They also provided me with excellent turnaround time and great product. I chose fiberglass for the pipe that was reinforced where the hoses connect. I painted it with awlgrip. My engines are 692 and I don't remember the cost. I could look it up if you need to know.
I also shipped my old ones to DeAngelo and they made exact replacements. I doubt whoever made them originally has the template to make them now, site unseen.
DeAngelo is an excellent choice. On Long Island Marine Manifolds in Farmingdale. They made me one last year out of Cupronickel for $300 with a one day turn around. The hardest part was removing it and the "might as well" replacement of the hump hose and 8" hose from the elbow to the muffler. the blue hose is not cheap. Also, locally sourcing 8" blue hose was not an option. I ended up having a 3' lengt5h and the hump hose shipped from Fisheries Supply out west. Im going to say the whole job in materials was close to $1000 including the elbow, hose and replacing all the clamps. Also when the elbow and hump hose off you should inspect your shower head.
You are right about the blue hose being obscenely expensive but it was so easy to work with that I felt better about it !!!!! The old black exhaust hose on mine was over 20 years old and in pretty decent condition but I was not up for the fight !! Plus, it would have been dumb of me not to replace it all at once.
I spoke to Paul at marine manifold he said he would make them for 800.00 per pipe maybe I misunderstood him I will have to call him back
yea call them back and check the quote. Im pretty sure it was 3oo. Let us know, I was planning on doing the other side this year because it cant be far behind the one that failed. The OEM one was stamped "Post 46" "port". I believe that Post had an in house welder fabricate them.
yes my black hose was also in excellent shape considering its age. I think it was at least 5 ply. The black hose was very difficult to work with and blue house was a breeze on the install. I will stick with the blue high heat silicone stuff in the future.
I called Marine manifolds in Farmingdale he is more money it's better material and I'll also have it by next week so I'm going to go with him. I don't know what size pipes you have but mine are 8 inch and it's a lot more than $300 per piece
Im glad you hooked up with them. I have had very good experiences with them and quick turn around. The tig welds on the elbow they did for me are beautiful. I have 8" pipes that they fabricated out of Copper Nickel, I may be off on the cost. but their work and turn around was top notch and worth it. good luck!
In my opinion the blue silicon hose is worth the extra money. As mentioned, it is much easier to work with as it flexes better than the more rigid black hose. Also the continuous temperature rating is at 350 degrees and it isolates vibration better because of its flexibility. Be aware that if you are switching from black to blue hose, you will need to purchase the t-bolt clamps for the blue silicon hose. As the wall thickness is less, the older clamps may not tighten down. Also remember to double clamp with the tightening screws offset by 90 degrees.
Metcalf has got my 12V71TI exhaust. - They are reworking it so there is more area cooled by the seawater. This will do away with most of the old nasty exhaust blankets to be replaced with advanced fiber components of some sort and max 140 degree temps.
If you are extending the double jacketed area, I would recommend that you go with Inconel as opposed to 316L. Mostly everyone is now going with the hardcoat insulation. If you do have blankets for the flanged area, make sure it does not cover the hardcoat as this will lead to delamination. PM me if you have any questions about this.
So here is a follow up from this thread. I have to remove my 671 exhaust manifold on my Starboard engine because the exhaust manifold gaskets in two cylinders have failed and are slightly leaking. To do this I need to remove the turbo and the mixing elbow. The elbow was from DeAngelo and made of stainless steel. I did use the blue exhaust hose when I installed them in 2017 or 2018. The blue hose was supple and was easily removed from the elbow after 4 to 500 hrs. The V-clamp was in perfect condition although I will replace it. The interior of the mixing elbow was corrosion free looking back into the unit with a flash light, it looks brand new The Mixing elbow separated from the turbo much easier than I expected by use of a 5 lb maul and a 2x4 It came apart in a matter of minutes. I cannot for the life of me remember the compound I used to seal the seam between the turbo and the elbow. I think it was beneficial in sealing and ease of removal. I found this thread searching for the caulk or sealant name because I am sure this forum is where I found it. Anyhow, summary, Blue hose really good, Stainless mixer and turbo really good. Sealant really good but I need the name !!!