Using a Dry Cast iron manifold, with waterjacket in a boat?

[J_C_E]

Ive seen waterjackets made for turbos. So could i use same type of heatshield/waterjacket with a cast iron manifold?
I have a project engine (inline 6) that has a cast iron manifold for turbo. Would save me alot of work making a good waterjacket instead of whole manifold.
The engine bay aint that tight/nothing would come close to the manifold/turbo.
Planning of using stock manifold and turbo, both with waterjackets/heatshields running seawater inside the jackets.

And lets skip the talk about turbo vs NA engines. This is a hobby of m9 so money will be spent as usual. :lol:

 

[Bondo]

Re: Using a Dry Cast iron manifold, with waterjacket in a boat?

Ayuh,.... Welcome Aboard,... Nothin' wrong with water cooled turbo's on water cooled manifolds,...

Why not start with a motor normally Used in boats to be able to Buy the hard parts,....
Insteada havin' to fab up such complicated pieces,...

Keepin' yer fabbed up "water jackets" from Leakin', is gonna be 'bout impossible,...

 

[J_C_E]

Re: Using a Dry Cast iron manifold, with waterjacket in a boat?

This engine weights 1/2 of a V8 and makes same power and nearly same torque. Thats the main reason. Fabrication is not that big of a problem. I see no reason why the waterjackets wouldnt be watertight?
Talking about this types of waterjackets:
http://www.maguireswelding.com/Turbo with water jacket.jpg

http://i49.photobucket.com/albums/f280/bjkgearhart/rayjay-1.jpg

 

[bruceb58]

Re: Using a Dry Cast iron manifold, with waterjacket in a boat?

Out of curiosity, what 6 cylinder engine are you using and what are you hooking it up to?

 

[glenn property of pam]

Re: Using a Dry Cast iron manifold, with waterjacket in a boat?

I would have thought that was a project as the cast iron can not be welded to with a different material with out problems. Now if you could buy a after market stainless header im sure that you could add a water jacket no problem.

 

[J_C_E]

Re: Using a Dry Cast iron manifold, with waterjacket in a boat?

Out of curiosity, what 6 cylinder engine are you using and what are you hooking it up to?

Its a volvo B6284T a 2.8 litre full aluminium turbo engine. Sterndrive is a volvo penta 290. Boat is a 22ft front cabin boat.

 

[J_C_E]

Re: Using a Dry Cast iron manifold, with waterjacket in a boat?

I would have thought that was a project as the cast iron can not be welded to with a different material with out problems. Now if you could buy a after market stainless header im sure that you could add a water jacket no problem.

Im not planning on welding anything to the cast iron manifold. Im planning on making a heat shield around it with a small airgap. The shield will be waterjacketed and seawater running inside it. Water will not contact the manifold. Just like those waterjackets made for turbo exhaust housings. I assume it should keep the heat out of the engine bay, but will the manifold stay cool enough or will they glow red all the time?
I could fabricate my own custom SS header, but im worried about possible cracking. As ive read some people have had cracked SS headers and water entering the engine.
With these waterjackets theres no risk of water entering the engine. Oh yea and no SS turbo headers are available for this engine.

 

[bruceb58]

Re: Using a Dry Cast iron manifold, with waterjacket in a boat?

Its a volvo B6284T a 2.8 litre full aluminium turbo engine. Sterndrive is a volvo penta 290. Boat is a 22ft front cabin boat.

Can that mate up to an existing bellhousing?

Your exhaust system is going to be a huge issue with heat the way you are planning it. How is the exhaust going to exit the boat without mixing water with it?

 

[J_C_E]

Re: Using a Dry Cast iron manifold, with waterjacket in a boat?

Can that mate up to an existing bellhousing?

Your exhaust system is going to be a huge issue with heat the way you are planning it. How is the exhaust going to exit the boat without mixing water with it?

Yes, there are adapters available. So mounting the engine to drive and boat is not a problem.

The exhaust pipe from turbo to the transom/stock exhaust pipe will be ofcourse fully waterjacketed/cooled. Water entering the jacket right after turbo. And then normally exiting through the shield/drive. Just like in stock system.

But i guess with the heatshield the engine bay temp will be low enough but the manifold will be hot as hell. Because nothing is cooling manifold itself, only the heat its reflecting.

 

[glenn property of pam]

Re: Using a Dry Cast iron manifold, with waterjacket in a boat?

Im not planning on welding anything to the cast iron manifold. Im planning on making a heat shield around it with a small airgap. The shield will be waterjacketed and seawater running inside it. Water will not contact the manifold. Just like those waterjackets made for turbo exhaust housings. I assume it should keep the heat out of the engine bay, but will the manifold stay cool enough or will they glow red all the time?
I could fabricate my own custom SS header, but im worried about possible cracking. As ive read some people have had cracked SS headers and water entering the engine.
With these waterjackets theres no risk of water entering the engine. Oh yea and no SS turbo headers are available for this engine.

oh my bad I see what you are thinking now. I guess tubing can be wrapped around the header then heat bandage applied so there is some contact heat absorption between the tubing and header and the bandages will keep the radiant heat down.

 

[bruceb58]

Re: Using a Dry Cast iron manifold, with waterjacket in a boat?

But i guess with the heatshield the engine bay temp will be low enough but the manifold will be hot as hell. Because nothing is cooling manifold itself, only the heat its reflecting.

Your exhaust will overheat unless you have direct heat transfer between the manifold and the water jacket. You don't have air flowing over it like you do in a car. Sounds like a dangerous fire situation.

This is why these mods don't happen often. Too expensive to create a safe exhaust system. Haven't even touched on the fuel system!

 

[J_C_E]

Re: Using a Dry Cast iron manifold, with waterjacket in a boat?

Your exhaust will overheat unless you have direct heat transfer between the manifold and the water jacket. You don't have air flowing over it like you do in a car. Sounds like a dangerous fire situation.

This is why these mods don't happen often. Too expensive to create a safe exhaust system. Haven't even touched on the fuel system!

Yes that is what i was thinking too, they will glow red hot. Ok so i will make my own SS header with waterjacket.
My fuel system is also modified. I also have a fully adjustable engine control unit. Wideband O2 sensor etc....