William Davies wrote: > > ----- Original Message ----- > From: Joe Curry <[EMAIL PROTECTED]> > > > > One large downside to exhaust wraps. They retain heat and moisture in > > the header and lead to premature deterioration of the header metal. I > > would never use them unless there was no alternative. > > Joe's comments started me on something of a tangent to this thread. I was wondering > what bearing exhaust wraps and coatings might have on the cracking which is a > perceived problem with stainless manifolds. Has anyone done any kind of study on > this? > Cheers, > Bill. > >
Bill, I would expect that it would exacerbate the cracking problem. This is because the additional heat that is kept in the header pipe makes the metal properties change. In mild steel headers, they tend to crystallize and that may be the same sort of thing that happens with stainless steel. The process makes the metal more brittle and therefore more prone to such cracking. Cheers, Joe /// [EMAIL PROTECTED] mailing list /// Send admin requests to [EMAIL PROTECTED] /// or try http://www.team.net/cgi-bin/majorcool /// Archives at http://www.team.net/archive /// Send list postings to [EMAIL PROTECTED] /// Edit your replies! If they include this trailer, they will NOT be sent.
