John:
Interesting.
While the advantage of light weight is obvious, it seems no one uses
aluminum for headers
and I must ask "why?".
The fatigue resistance of aluminum is very poor relative to steel, and
it is
generally more difficult to mandrel bend aluminum tubing without cracking it. I
suspect
that the poor fatigue resistance of AL makes in a good deal less durable that
steel in
a street type application.
The much lower melting point of aluminum means that if your mixture is
off,
you will destroy them, and then there is the question of noise. I would guess
that
aluminum does a better job of damping the exhaust noise, but that is just a
guess.
Let us know what you find out.
Regards,
Vance
-----Original Message-----
From: John Korsak [mailto:jkorsak@heath-bloxom.com]
Sent: Tuesday, September 09, 2003 12:38 PM
To: 6 Pack List
Subject: Aluminum Header
Has anyone had any experience with Cold rolled Aluminum headers? I was the
unsuccessful bidder on one that was recently sold on EBay. It sold for just
over $200. I was going to get it Jet Hot (ceramic) coated before
installation. I'm wondering if it would hold up for any length of time? It
would be lighter than steel, wouldn't it? This would be used for street use
with mild cam and triple carbs.
Thanks for your input.
John
74 TR6
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