Atomic 4 exhaust - SailNet Community

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Go Back   SailNet Community > On Board > Gear & Maintenance
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  #1  
Old 03-20-2006
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Atomic 4 exhaust

I am kind of a die hard when it comes to my Atomic 4. I have owned a couple of these motors and they are very good and quiet and smooth. I decided to rebuild the exhaust and started with a nice 1 1/4" thread to hose bronze fitting next I tracked down bronze elbows no problem. Now for the 11" pipe nipple and the 5" pipe nipple. It ain't happinin. I have looked all over all I can find is brass and if you know about heat water and brass = dezincification X a few hours = bummer. I don't think I want to use brass. But I cant find bronze pipe. This is a problem I did not think of running into. If you have some source please post and don't tell me brass will be ok or before you do please look at this site http://www.corrosionlab.com and then read some of this stuff. http://www.ybw.com/forums/showflat.p...iew/collapsed/

This changed my mind on brass real quick so where is the BRONZE PIPE?
Bronze is copper and tin
Brass is copper and zinc ahhhhhh! Zinc
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Old 03-20-2006
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Consider copper! Most of the 'steam risers' mounted on A4's of the 60s and 70s used copper pipe for the 'outter' section of the jacketed exhaust system .... then use judiciously placed 'pencil zincs' (in 'bosses') to protect the copper. If you ever get to see the 'insides' of the '60s and early '70s Pearsons, take a good look if they still have their original exhaust systems ... mostly copper!
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Old 03-21-2006
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Without spending lotsa time to give a definitive answer I can offer the McMaster-Carr site as a possible resource (http://www.mcmaster.com/). I have found many hard to find things there and always had good service, meaning they shipped it fast and it was right. Usual disclaimer, I have no connection....etc.

Brian
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Old 03-21-2006
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Thanks for the info people. I will continue to look into the bronze pipe,but the copper may be a good way to go also. I already have the bronze elbows and hose barb so I guess if I used copper in between the fittings it would be ok. If I remember correctly type M is mil spec copper and is heavy wall. Any takers on this bring it on people. Thanks Again
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Old 03-21-2006
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Geez the computer quickly spit that one out and here it is for us all.
Copper pipe is available in three basic types: Type M is thin-walled, Type L is medium-walled and Type K is thick-walled. In most cases, Type L is good for ...
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