<div dir="ltr"><div class="gmail_default" style="color:rgb(51,51,255)">I had the DW header pipes on my 100 wrapped with heat tape for about two years, then took it off and went to a reflective shield. I noticed no deterioration of the pipes when I changed over to the shield and that was ten years ago.</div><div class="gmail_default" style="color:rgb(51,51,255)"><br></div><div class="gmail_default" style="color:rgb(51,51,255)">I don't believe that polishing is not the way to go as sometimes the process brings impurities to the surface and causes a lot of corrosion, esp. in SS. I have Jet-Hot coating or the like on the headers of all of my race cars and everything is intact and nice and shiny! </div><div class="gmail_default" style="color:rgb(51,51,255)"><br></div><div class="gmail_default" style="color:rgb(51,51,255)">Best--Michael Oritt</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sun, Nov 15, 2015 at 9:52 AM, Bob Spidell <span dir="ltr"><<a href="mailto:bspidell@comcast.net" target="_blank">bspidell@comcast.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="font-family:Arial;font-size:12pt;color:#000000"><div>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><br></div><div>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><br></div><div>Bob<br></div><div><br></div><hr><div 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" <<a href="mailto:coudesluijs@chello.nl" target="_blank">coudesluijs@chello.nl</a>><br><b>To: </b>"healeys" <<a href="mailto:healeys@autox.team.net" target="_blank">healeys@autox.team.net</a>><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?<span class=""><br><div><br></div><div>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></span><blockquote><span class=""><div><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></fieldset></span>\<br></blockquote><div><br></div></div><div><br></div></div></div><br>_______________________________________________<br>
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