Many thanks for the replies and John, I have found Seaboard Marine> Tony's tips. It is really good and clear advice with dimensions, shapes, sizes etc and I can take it from there. It will save me from a lot of local "what to do " opinions.
Ross Date: Tue, 30 Jun 2009 17:03:47 -0700 From: [email protected] Subject: [UnifliteWorld] Re: Subject. Exhaust risers.. 38 sf 6/71 TI s ( 325 SHP) To: [email protected] There are a couple guys out there who have written great articles on marine exhaust system design requirements. One is a surveyor whose name escapes me but somebody on this site has posted a link to his articles in the past so they may jump in here. The other is Tony Athens @ Seaboard Marine in San Diego. His multipart article is available on his website. Find Seaboard Marine and go to 'Tony's Tips' and start reading. Basically, the exhaust system has to be done right and has to fit your particular boat and engine combination or the engine won't last long. Tony and the other guy said pretty much exactly the same thing and they have 60 or 70 years experience between them. Tony's article has lots of pictures in it and he only does diesel engines. John --- On Tue, 6/30/09, Ross Robertson <[email protected]> wrote: From: Ross Robertson <[email protected]> Subject: [UnifliteWorld] Subject. Exhaust risers.. 38 sf 6/71 TI s ( 325 SHP) To: [email protected] Date: Tuesday, June 30, 2009, 7:57 AM I have vertical cylindrical exhaust risers., comprising 2 (vertical) tubes, one inside the other. Exhaust gases enter the inner tube and cooling seawater enters the top outside tube, both exit through a 6" pipe to a fiberglass expansion chamber. Both risers are currently OK but have already had weld repairs , so logically their days are numbered. A friend's boat with 3208TI V8 Cats has different risers. They are inverted U's with exhaust gases fed in at the forward end and cooling water injected at the apex of the U; water and gasses exit at the aft of the U. It is likely my risers will need replacing within 6 months... and I would really welcome information as to whether I should just replace the existing risers ( quite expensive to make ) , or fit the inverted U's which seem much simpler/cheaper.... can anyone give me advice? Windows Live™: Keep your life in sync. Check it out! _________________________________________________________________ Windows Live™: Keep your life in sync. Check it out! http://windowslive.com/explore?ocid=TXT_TAGLM_WL_t1_allup_explore_012009 --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "UnifliteWorld" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/UnifliteWorld?hl=en -~----------~----~----~----~------~----~------~--~---
