What I'm wondering is.... I can fully understand why a typical thin walled
steel header would simply fall apart in time with the wrapping.... BUT....
what about a stock cast header.... these things are thick! If a stock header
will only last half as long, if wrapped... who cares... what's 1/2 of
forever? I'm just curious if anyone wrapped a stock cast header, and found
problems later? I've been tempted to do the wrapping... it would seem to me
to be a good thing... considering the close proximity of the generator,
starter and intake manifold/carbs....
--Justin
Shawn Loseke wrote:
> That's an easy question to answer. When you unwrap the header, it falls
> apart. I've seen it happen more than once. In all cases, the owners did not
> re-wrap their new headers. Remember that when you see racers use the stuff,
> that doesn't mean it will work correctly for you. They often replace
> everything every few races anyway. Their idea of longevity is for the
> product to finish the race. Ours is usually a little longer.
>
> Shawn
> -------------
> Original Text
> From: "Jim Hill" <Jim_Hill@chsra.wisc.edu>, on 10/1/98 4:09 PM:
> Alan Myers wrote:
>
> > In lieu of a heat shield, has anyone on the list tried the high
> > temperature insulation wrap available for headers (and probably most
> > standard manifolds)? . . . it is supposed to not only help keep the
> > entire engine bay much cooler, but also accelerate exhaust gasses
> > passing through the system
>
> Ted Schumacher's right (DUH!):
> > be careful of header wrap. on the dyno the header wrap has been
> causing
> > the exhaust to rust. you would be better off to either ceramic coat or
> > just fabricate a heat shield.
>
> The price of keeping the engine bay cooler by wrapping the exhaust
> header is that all the exhaust heat stays inside, raising the
> temperature of the header and hastening its eventual demise. Ask someone
> what happens when you unwrap the header for inspection after a couple of
> years.
>
> Jim Hill
>
> d
|