jrnj
Member
Don't know what the bravo 2 was originally bolted to. I'm interested in any parts you might have.
Hi Jrnj,Don't know what the bravo 2 was originally bolted to. I'm interested in any parts you might have.
its part of the air to water intercooler circuit, plan to add a watercooled alternator to it.Nicely done
Is that little heat exchanger at the front an oil cooler or part of the AWIC system?
He responded to a PM of mine the day he posted his pics (6/16) with this:Updates?
So once again, back to the drawing board.In modern engine technology and, in particular, for special use engines, such as unmanned marine engines, or stationary engines, and the like, turbochargers are used and are powered by the hot exhaust gases from the engine. It is desirable to convey the hot exhaust gases from the engine to the turbocharger in as high a temperature state as is possible. It is also desirable to maintain the outside temperature of the manifold below a predetermined temperature, such as below 400° F. Heretofore, water jackets have been provided about exhaust pipes for the purpose of reducing the external surface temperature of the manifold and, at the same time, to prevent fires on unmanned engines. Unfortunately, the use of water jackets reduces the temperature of the exhaust gases, thereby reducing energy supplied to the hot exhaust gas turbocharger.
Some attempts have been made to produce a manifold with a surface temperature within allowable limits and, at the same time, to maintain the temperature of the exhaust gases as high as possible. One such system provides a sleeve inside the manifold which is surrounded by an air space which air space provides insulation for the hot exhaust gases to keep their temperature as high as possible and, at the same time, to reduce the amount of heat transmitted to the water of the water jacket.
I have a Cummins 4BT marine turbo and wet manifold sitting at home, inner workings no difference to the automotive version.so all thats left to say: see caterpillar patent.Marine turbochargers such as those on Volvo Penta engines have watercooled hotsides as well as watercooled manifolds, so I guess the conclusion must be that they are specifically designed for these operating conditions whereas automotive turbos apparently aren't?
Take a look at the "kit" photo. He IS using an AWIC set up. He stated that he's needs larger heat transfer area.Considered air to water for intercooling?
Can pretty much guarantee that unless you're boating in boiling water, it'll be thermally efficient.
If the smaller belt becomes and issue, could you run two smaller alternators in parallel, one off each engine?
This is something I looked into back in my go fast days. The ceramic coating helps keep the heat inside the exhaust, if it's coated inside and out. That helps speed up flow to a small degree. Most stock to mildly modified engines won't notice much of a difference. After running a while, heat soak does become an issue and radiant heat starts to rise, especially in enclosed spaces like engine dog houses. Air flow does help and the exhaust can cool down faster. This helps drag racers that only blast down the track for a few seconds at a time. The one thing that ceramic coating does do extremely well is protect the base metal the exhaust is made from. It can be very difficult to coat the inside of exhaust system parts because of their shape.What about using ceramic coatings to reduce external surface temperatures of manifolds? Or is heat soak an issue? seeing as the environment is different than a road machine the integrity of the coatings should last a long time.