I have followed other A4 owners problems with great concern due to my own restoration efforts on my Tartan 34C 1971. The hot section has been my greatest problem. The system redo has worked fine, new water lift unit (Moyer), however the close conditions that exist around the Tartan 34C engine and exhaust compartment has been a large concern to me. Even with the hot section wrap (Moyer), new temp sender and gauge the interior cabinet temp is so high that the wood surfaces close to the hot section can and has scorched. This has lead me to remove the top and side of the compartment during engine operation. Some of the hot section was within 1" to a wood surface. The heat build up in this area is quite high so I am looking into installing a 10,000 hour 250 cfm 12 volt vapor proof fan, that will operate as a direct compartment air exhaust fan operating in the on position when the engine is on. I will have to provide air make up to allow good air flow i.e. negative air preasure. Also I need to line the interior of the hot section compartment with a thin reflective thermal insulation material 1/4 to 1/2" designed for hot zones.
My concern is based on the high temp scorching that showed up on my wood surfaces. I read a report on the effects of hot pipes both water and steam on wood surfaces for long durations, and high moisture levels this report showed that combustion can and has happened when wood is close to hot pipes like when residential hot water heating pipes pass thru wood floors combustion can happen at low temp levels surrounding the pipe like 150 degrees F. dry bulb , this report list some case history however the school was still out on this.
I will not stand around for the school doors to close on this one. With so many folks redoing there exhaust system this topic needs to be covered, fire on board, well you know the rest of the story.
Harvey
Tartan34C 1971 hull #107
My concern is based on the high temp scorching that showed up on my wood surfaces. I read a report on the effects of hot pipes both water and steam on wood surfaces for long durations, and high moisture levels this report showed that combustion can and has happened when wood is close to hot pipes like when residential hot water heating pipes pass thru wood floors combustion can happen at low temp levels surrounding the pipe like 150 degrees F. dry bulb , this report list some case history however the school was still out on this.
I will not stand around for the school doors to close on this one. With so many folks redoing there exhaust system this topic needs to be covered, fire on board, well you know the rest of the story.
Harvey
Tartan34C 1971 hull #107
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