[Healeys] Jet-coating, wrap or do nothing to stainless headers?

[Michael Oritt]

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.

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!

Best--Michael Oritt

On Sun, Nov 15, 2015 at 9:52 AM, Bob Spidell <bspidell at comcast.net> wrote:

> 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).
>
> 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.
>
> Bob
>
> ------------------------------
> *From: *"Oudesluys" <coudesluijs at chello.nl>
> *To: *"healeys" <healeys at autox.team.net>
> *Sent: *Sunday, November 15, 2015 2:28:55 AM
> *Subject: *Re: [Healeys] Jet-coating, wrap or do nothing to stainless
> headers?
>
> 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.
> Kees Oudesluijs
>
>
>
>
> Op 15-11-2015 om 11:11 schreef Simon Lachlan:
>
> I have stainless headers going down into a big bore(?) exhaust.
>
> Opinions seem to vary as to the merits of wrapping, coating or doing
> nothing to them .
>
> I have Webers above them, but I suspect, in my ignorance, that these are
> maybe less prone to evaporation issues than SUs.
>
> What does the panel think?
>
> See attached for a well researched synopsis. (Not by me!)
>
> Simon
>
> \
>
>
>
>
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