I've used header wrap on the turbo exit pipe for years and haven't seen
accelerated corrosion. I think the difference in experience across the
country may be due to the climate conditions. When the header is hot and
allowed to cool, moisture can only be drawn and condense on the wrap/header
if there is moisture present. Those of us who pamper our cars with garage
storage in California are driving our hot manifolds into a fairly moisture
free environment for the "cool down". If I were parking my heated up Sprite
by the beach or outside in high humidity, I suppose it would be more of a
factor. As it is now, I'm quite sure the header pipe will outlive me.
There is absolutely no question that it has made a difference in the
under-bonnet temps.
I only wrap the pipe exiting the turbo however, since wrapping the manifold
before the turbo caused it to get so hot that the expansion increased the
cracking problem with the original homemade manifold. The new one is
thicker, better welded, and supported by a brace to take the turbo weight.
No cracks yet!
Glen Byrns
> Hello all, I just finished reading an article about exhaust wrap which
> basically said it would severely shorten the life of the header.In other
> words,
> "don't use it". Any thoughts out there? How about the coating for both
> the
> inside and outside of the pipe that I see advertised? Some kind of
> ceramic ?
> Summer is coming on and I need something to keep the heat down.Bob C
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