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any metallurgists here :)
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The Vega blocks were cast in high-silicone aluminum. They would =
carefully acid etch the cylinders, which would remove a small amount of =
aluminum, leaving the silicone as the wear surface. You know how well =
that worked....
Larry
----- Original Message -----=20
From: Ron Pieper=20
To: Alan Stamper ; Dan Smith ; L F ; Allyn ; Ryan Schuermann ; =
scirocco-l@scirocco.org=20
Sent: Monday, February 24, 2003 4:35 AM
Subject: Re: any metallurgists here :)
There are/were several, but mfgrs have figured out how to get the =
silicone? to migrate towards the
wall surfaces during the cooling process, providing a wear-resistant =
surface. =20
And, although I'll have to check, I believe the liners would probably =
be cast iron vs. steel.
Ron
--- Alan Stamper <scirocco-al@insight.rr.com> wrote:
> As for the wear almost every aluminum engine has sometype of steel =
or steel alloy liners in the
> cylinders for the pistons to move in. Unless you do that you end up =
with Vega's. Any one else
> know of a car with an aluminum block without liners?
>=20
> Alan
> ----- Original Message -----=20
> From: Dan Smith=20
> To: L F ; Allyn ; Ryan Schuermann ; scirocco-l@scirocco.org=20
> Sent: Sunday, February 23, 2003 6:47 PM
> Subject: Re: any metallurgists here :)
>=20
>=20
> I knew weight was the reason, I just wasn't sure on the expansion =
thing. I wouldn't put it
> past auto makers to make a lighter, more efficient engine that wore =
out a lot quicker due to
> expansion and contraction, hence the question.=20
>=20
> Dan=20
>=20
> L F <rocco16v@netzero.net> wrote:=20
>=20
> Aluminum does have a coefficient of expansion greater than the =
ferrous alloys and cast iron.
> That characteristic is accounted for when they design for aluminum. =
Aluminum blocks are
> becoming more popular for one reason; weight.
> (And vehicle weight is the major player in the quest for greater =
mileage)
>=20
> Larry
> sandiego16v
> ----- Original Message -----=20
> From: Dan Smith=20
> To: Allyn ; Ryan Schuermann ; scirocco-l@scirocco.org=20
> Sent: Sunday, February 23, 2003 1:43 PM
> Subject: Re: any metallurgists here :)
>=20
>=20
> Speaking of engine metal, why are most engines aluminum now? =
Doesn't aluminum expand and
> contract a lot under heat/cold? Wouldn't that really stress out =
parts and stuff?=20
>=20
> Dan=20
>=20
> Allyn <amalventano@sc.rr.com> wrote:=20
>=20
> if it wasnt an alloy, our bottom ends would all be piles of =
orange dust by
> now.
> Al
>=20
> ----- Original Message -----
> From: "Ryan Schuermann"=20
> To:=20
> Sent: Sunday, February 23, 2003 4:21 PM
> Subject: any metallurgists here :)
>=20
>=20
> > ok our beloved vw bottom end is... cast iron? Does anyone =
know
> > if it's pure iron or an alloy of some type?
> >
> > Ryan
> >
> > __________________________________________________
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> > Scirocco-l@scirocco.org
> > http://neubayern.net/mailman/listinfo/scirocco-l
> >
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<DIV><FONT face=3DArial size=3D2>The Vega blocks were cast in =
high-silicone=20
aluminum. They would carefully acid etch the cylinders, which =
would remove=20
a small amount of aluminum, leaving the silicone as the wear =
surface. You=20
know how well that worked....</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>Larry</FONT></DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: =
0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A href=3D"mailto:rapieper@yahoo.com"; title=3Drapieper@yahoo.com>Ron =
Pieper</A>=20
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A=20
href=3D"mailto:scirocco-al@insight.rr.com"; =
title=3Dscirocco-al@insight.rr.com>Alan=20
Stamper</A> ; <A href=3D"mailto:sad_rocc@yahoo.com"; =
title=3Dsad_rocc@yahoo.com>Dan=20
Smith</A> ; <A href=3D"mailto:rocco16v@netzero.net"; =
title=3Drocco16v@netzero.net>L=20
F</A> ; <A href=3D"mailto:amalventano@sc.rr.com"=20
title=3Damalventano@sc.rr.com>Allyn</A> ; <A=20
href=3D"mailto:big_hot_tamale@yahoo.com"; =
title=3Dbig_hot_tamale@yahoo.com>Ryan=20
Schuermann</A> ; <A href=3D"mailto:scirocco-l@scirocco.org"=20
title=3Dscirocco-l@scirocco.org>scirocco-l@scirocco.org</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Monday, February 24, 2003 =
4:35=20
AM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: any metallurgists =
here=20
:)</DIV>
<DIV><BR></DIV>There are/were several, but mfgrs have figured out how =
to get=20
the silicone? to migrate towards the<BR>wall surfaces during the =
cooling=20
process, providing a wear-resistant surface. <BR><BR>And, =
although I'll=20
have to check, I believe the liners would probably be cast iron vs.=20
steel.<BR><BR>Ron<BR><BR>--- Alan Stamper <<A=20
=
href=3D"mailto:scirocco-al@insight.rr.com";>scirocco-al@insight.rr.com</A>=
>=20
wrote:<BR>> As for the wear almost every aluminum engine has =
sometype of=20
steel or steel alloy liners in the<BR>> cylinders for the pistons =
to move=20
in. Unless you do that you end up with Vega's. Any one=20
else<BR>> know of a car with an aluminum block without =
liners?<BR>>=20
<BR>> Alan<BR>> ----- Original Message -----=20
<BR>> From: Dan Smith <BR>> To: L F ; =
Allyn ;=20
Ryan Schuermann ; <A=20
href=3D"mailto:scirocco-l@scirocco.org";>scirocco-l@scirocco.org</A>=20
<BR>> Sent: Sunday, February 23, 2003 6:47=20
PM<BR>> Subject: Re: any metallurgists here :)<BR>> =
<BR>>=20
<BR>> I knew weight was the reason, I just wasn't sure =
on the=20
expansion thing. I wouldn't put it<BR>> past auto makers to make a =
lighter,=20
more efficient engine that wore out a lot quicker due to<BR>> =
expansion and=20
contraction, hence the question. <BR>> <BR>> Dan =
<BR>>=20
<BR>> L F <<A=20
href=3D"mailto:rocco16v@netzero.net";>rocco16v@netzero.net</A>> =
wrote:=20
<BR>> <BR>> Aluminum does have a =
coefficient of=20
expansion greater than the ferrous alloys and cast iron.<BR>> =
That=20
characteristic is accounted for when they design for aluminum. =
Aluminum blocks=20
are<BR>> becoming more popular for one reason;=20
weight.<BR>> (And vehicle weight is the =
major=20
player in the quest for greater mileage)<BR>>=20
<BR>> Larry<BR>> =
sandiego16v<BR>> ----- Original =
Message=20
----- <BR>> From: Dan Smith=20
<BR>> To: Allyn ; Ryan =
Schuermann ; <A=20
href=3D"mailto:scirocco-l@scirocco.org";>scirocco-l@scirocco.org</A>=20
<BR>> Sent: Sunday, February =
23, 2003=20
1:43 PM<BR>> Subject: Re: any=20
metallurgists here :)<BR>> <BR>>=20
<BR>> Speaking of engine metal, =
why are=20
most engines aluminum now? Doesn't aluminum expand and<BR>> =
contract a lot=20
under heat/cold? Wouldn't that really stress out parts and stuff? =
<BR>>=20
<BR>> Dan <BR>>=20
<BR>> Allyn <<A=20
href=3D"mailto:amalventano@sc.rr.com";>amalventano@sc.rr.com</A>> =
wrote:=20
<BR>> <BR>> if =
it wasnt=20
an alloy, our bottom ends would all be piles of orange dust=20
by<BR>> =20
now.<BR>> =
Al<BR>>=20
<BR>> ----- =
Original=20
Message -----<BR>> =
From:=20
"Ryan Schuermann" =
<BR>> To:=20
<BR>> Sent: Sunday, =
February 23, 2003 4:21=20
PM<BR>> Subject: =
any=20
metallurgists here :)<BR>> <BR>>=20
<BR>> > ok our =
beloved=20
vw bottom end is... cast iron? Does anyone=20
know<BR>> > if =
it's pure=20
iron or an alloy of some=20
type?<BR>> =20
><BR>> >=20
Ryan<BR>> =20
><BR>> >=20
=
__________________________________________________<BR>> &nb=
sp; =20
> Do you =
Yahoo!?<BR>> =20
> Yahoo! Tax Center - forms, calculators, tips,=20
more<BR>> > <A=20
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href=3D"http://taxes.yahoo.com/";>http://taxes.yahoo.com/</A><BR>> =
; =20
><BR>> >=20
=
_______________________________________________<BR>> =
=20
> Scirocco-l mailing=20
list<BR>> > <A=20
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href=3D"mailto:Scirocco-l@scirocco.org";>Scirocco-l@scirocco.org</A><BR>&g=
t; =20
> <A=20
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href=3D"http://neubayern.net/mailman/listinfo/scirocco-l";>http://neubayer=
n.net/mailman/listinfo/scirocco-l</A><BR>> &nbs=
p; =20
><BR>> <BR>> =
<BR>> =20
=
_______________________________________________<BR>> =
=20
Scirocco-l mailing l!=20
ist<BR>> <A=20
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