ebay brake rotors--forging...

[mr.utility at highstream.net (David Utley)]

Larry,
  I agree that forging is more effective, and quick, if it is done under
pressure.  However, this is coming from Morgan, so I do not know what to
say?  If they are online, I will send them an email and see if they can shed
some light on it?  I trust the friend with my life, so I do not think he is
pulling anything with me


  To carry through on what you just mentioned, I grant you that a used
engine will work-forge (or stress-relieve as you put it), with the thousands
of heat cycles.  Is it not true to a lesser degree with an item that has
hundreds of heat cycles with the warming of the day, and the cooling of the
night?  Especially considering that it is done very slowly, which as I
understand it is done in some forging practices?  If you would, please help
me remember which ones and why slower warming/cooling is effective/helpful


Thanks,
  David Utley

-----Original Message-----
From: L F [mailto:rocco16v@netzero.net]
Sent: Wednesday, March 10, 2004 8:19 PM
To: David Utley; Euroroc II
Cc: Scirocco-l@scirocco.org
Subject: Re: ebay brake rotors--forging...

David,
  Somebody gave your friend some bad info.
Used cast iron blocks are desireable because the heat cycling tends to
stress relieve them, whereas a 'green' block still has some "moving around"
to do.
Cast iron parts do nothing just laying around, as opposed to some aluminum
alloys which DO age over time.
I take that back; cast iron parts DO go through a change.....they convert to
iron oxide.

Nothing gets 'forged' just watching the weeds grow...it takes heat and
pressure to forge.

Larry
----- Original Message -----
From: David Utley <mailto:mr.utility@highstream.net>
To: Euroroc II <mailto:flaatr@yahoo.com>
Cc: Scirocco-l@scirocco.org <mailto:Scirocco-l@scirocco.org>
Sent: Tuesday, March 09, 2004 12:15 PM
Subject: Re: ebay brake rotors--forging...

LOL...

  Yeah, I did learn something interesting about this though...  A close
friend
went where they make Morgans in England years ago.  He saw in the back that
they had brake drums and blocks waist-high, piled out in the open...  He
asked
what was all the waste rubble lying around, and they replied that those were
new rotors and blocks, aging...  They said that they let them age a minimum
of
two years, then bring them in and machine them for use.  Why?  They actually
forge over time, from the hot-cold of day and night repeated several hundred
times.  That, and this is in England, which has to be one of the rustiest
(is
that a word?) places in the world...  I thought that was very interesting...

  On a side note, most seasoned engine builders prefer to build a good used
block over a brand new one for this reason.  The number of heat cycles work
hardens the block...  The one obvious exception to this rule has to be VW
aircooled blocks.  Ultimately, they should not be reused....

Just food for thought....

Regards,
  David Utley
Quoting Euroroc II < flaatr@yahoo.com <mailto:flaatr@yahoo.com> >:

> Some one needs to buy these... they're like new!!!
>
> http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?
ViewItem&category=33564&item=2465387184
>
> -Raffi
>
>
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>



David Utley
-----------
Cable Volkswagen
405-470-3129
1-800-522-6793

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