A6 4.2L - pros and cons?

[Dave]

it was even more extreme than that.  they got blocks that had 100k on them
and left them in the weather to "age".  they even apparently encouraged
their staff to use them for target practice.  for number 1's.  this further
improved the aging process.
 
dave
'03 rs6
'04 allroad tdi


On 8/01/09 7:51 AM, "Louis-Alain Richard" <larichard at plguide.com> wrote:
> 
> I've heard that story in the past. BMW Formula 1 engines in the turbo era
> (same period as the famous Group B) were 1,5 liter 4-bangers. To accept the
> stress of 1000 hp, BMW used to take the blocks out of staff cars because
> they had some "heat cycling", increasing the resistance of the blocks. In
> metallurgy, this process of heat-cycling can help bond the molecules
> together, and favors "grain growth". I guess it was an empirical process, as
> often metallurgy is.