ebay brake rotors--forging...

[rocco16v at netzero.net (L F)]

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 
  To: Euroroc II 
  Cc: 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>:

  > 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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