Come on, you guys!  Haven't you ever been to a good old fashioned
VW-engine-case-bonfire???  No, I'm not kidding.  Quite spectacular.....
bmc  :)
"Faith will move mountains, but you'd better bring a shovel...."

> From: Jim Arnott <jrasite@EONI.COM>
> Organization: http://WetWesties.org
> Reply-To: Jim Arnott <jrasite@EONI.COM>
> Date: Thu, 29 Aug 2002 20:09:40 -0700
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: Fire Extinguishers
>
> Doing about 2 minutes of research reveals the following:
>
> Early aircooled engines (25 & 36-40 hp) used AS41 alloy for the cases.
> AS41 is: aluminum 4.2% silicon 1%. The remainder is... magnesium
>
> Later 1300-1600 motors used AS21 alloy.  AS21 is:
> 2.3% aluminum, 1% silicon a bit of zinc and manganese and, you guessed
> it. Magnesium.
>
> <http://www.northerndiecast.com/mcalloy.htm>
>
> The type IV and wasserboxer case material seem to be a bit more of a
> secret. But if someone can come up with the spec, the composition is
> just a minute away.
>
> There's also a bit of info on the type2.com website.
>
> Jim
>