|Stuart Turner R3M exhaust\cooling wat...
|Posted on Sunday, December 23, 2001 - 11:15 am: ||
I am thinking of diverting the cooling water into the exhaust, so as to prevent the build up of carbon deposits in the muffler.
Has anyone attempted this, or have any advice/precautions on doing this?
|Posted on Sunday, December 23, 2001 - 07:13 pm: ||
Cooling water is commonly piped into the engine exhaust in order to help cool and quiet the exhaust. There are so many options for how to pipe the exhaust and cooling water, that you should refer articles or books that cover it... but some points include:
- You need to prevent the possiblity of cooling water being pulled back into the engine during operation, startup, shutdown, backfire, etc. It is therefore necessary to pipe the water into the exhaust at a point lower than the engine or downstream of a trap. Most of the early books indicate 4" below the exhaust discharge from the engine.
- Early marine mufflers often had a drain. Some water would go out with the exhaust, some would be piped from the drain to a thru hull fitting.
- Too much water can increase back pressure in the muffler... it depends on the engine and the muffler and the length of the exhaust piping. Some installations had a tee with a valve to control the amount of water added to the exhaust, with the remainder piped overboard.
|Posted on Wednesday, December 26, 2001 - 09:05 am: ||
Colin .depends what you are doing . In my case my engines dont go to sea . They just go to Rallys in my trailer ! But in the latest Stuart that i have restored i did put in a tee conection so that i could '' blow '' a bit of water through the exhaust . Sounds good but makes a bloody mess . So i put a globe valve on it and i can turn it of now and then . What Andrew says is right about where you make your connection and if you are running it in a boat i would definately put in a water cooled exhaust .
In the two Stuarts that i have done i made a new exhaust out let . I fabricated a brass one and it looks good . Allmost with out fail the original CI ones are cracked with corrosion . If you look at the History page , Stuart Turners you will see the ones i made .