<html><body><div style="font-family: Arial; font-size: 12pt; color: #000000"><div aria-label="Compose body">I'll add that, although I wrapped the mild steel downpipes on my BJ8 and have no problems--that I know of--I've become reluctant to recommend it. I've seen photographic evidence of pipes being severely eroded by wrapping; though it appears to be a hit-or-miss issue, and may be due, in part, to how they were wrapped and what they were wrapped with (I have to believe if it was a very common problem nobody would buy the wrap and companies would cease to sell it). I wouldn't expect ceramic coating to be a problem, at least if the pipes were coated both inside and outside (inside only might even be better).<br></div><div aria-label="Compose body"><br></div><div aria-label="Compose body">Here in the colonies we mostly have to use gas with 10% ethanol ('pure' gas is available at some stations, but it's relatively rare). On a warm day, if my engine is hot and shut down for less than a couple hours and restarted I'll get some stumbling until air flow has cooled everything off a bit. I can't say with absolute certainty that the gasahol is the problem, but I don't recall this ever happening before the new formulation became prevalent. I think ceramic coating the manifold might cure this problem.<br></div><div aria-label="Compose body"><br></div><div aria-label="Compose body">Bob<br></div><div><br></div><hr id="zwchr"><div style="color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;" data-mce-style="color: #000; font-weight: normal; font-style: normal; text-decoration: none; font-family: Helvetica,Arial,sans-serif; font-size: 12pt;"><b>From: </b>"Oudesluys" <coudesluijs@chello.nl><br><b>To: </b>"healeys" <healeys@autox.team.net><br><b>Sent: </b>Sunday, November 15, 2015 2:28:55 AM<br><b>Subject: </b>Re: [Healeys] Jet-coating, wrap or do nothing to stainless headers?<br><div><br></div><div class="moz-cite-prefix">Mirror polish them and leave them alone. Wrapping may lead to burning the metal away, coating possibly a similar story. By polishing you reduce the radiation of heat so the carbs should remain relatively cool. Anyway Webers/DellOrto's do not have the tendency to boil fuel. Also a car with an electric fuel pump does not normally have problems with fuel vapour lock.<br> Kees Oudesluijs<br> <br> <br> <br> <br> Op 15-11-2015 om 11:11 schreef Simon Lachlan:<br></div><blockquote cite="mid:002d01d11f8d$f43ad080$dcb07180$@lachlan@homecall.co.uk"><div class="WordSection1"><p class="MsoNormal">I have stainless headers going down into a big bore(?) exhaust.</p><p class="MsoNormal">Opinions seem to vary as to the merits of wrapping, coating or doing nothing to them .</p><p class="MsoNormal">I have Webers above them, but I suspect, in my ignorance, that these are maybe less prone to evaporation issues than SUs.</p><p class="MsoNormal">What does the panel think?</p><p class="MsoNormal">See attached for a well researched synopsis. (Not by me!)</p><p class="MsoNormal">Simon</p></div><br><fieldset class="mimeAttachmentHeader"></fieldset>\<br></blockquote><div><br></div></div><div><br></div></div></body></html>