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What would this do... (technobabble)
- Subject: What would this do... (technobabble)
- From: SCIROCCO_SPEED@msn.com (Brandon Smith)
- Date: Fri, 4 Oct 2002 16:12:05 -0600
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Someone sounds like they know a bit about Mechanical Engineering. I am a=
n ME student at Colorado State, what you said very true.
Most of the few times i've seen people do this, the first thing that usua=
lly starts to go is their piston rings... especially when they do somethi=
ng stupid like run that Valvoline VR-1 Racing oil in a 20w-50 in the Dead=
of winter in colorado at 5:30 in the morning. (come one now...some of y=
ou i'm sure have a cousin or something that did this in their Mazda Prote=
ge...mine did...dumbass).
-Brando =20
----- Original Message -----
From: Allyn
Sent: Friday, October 04, 2002 2:18 PM
To: Vince Royer; Scirocco List
Subject: Re: What would this do... (technobabble)
1. when cold, the oil is too viscous. in extreme cases, its so thick that=
it
cant properly flow into areas of tight tolerance, resulting in those area=
s
wearing. keep that up a few times and eventually you have something major=
go.
2. your engine does not warm up evenly. during the warmup process there a=
re
large differences in temperature across the thick portions of the block/h=
ead.
this temperature difference results in high tensile stresses in some area=
s.
throwing high rpm stresses in there may be enough to make some preexistin=
g flaw
start spreading into a large crack.
3. operation at high rpm implies faster heatup of the metal (due to faste=
r
combustion/friction/etc), making the temperature difference greater, and =
the
tensile stresses (#2) even higher.
4. when cold, metal has a lower stress point where it will fracture. this=
makes
#2 even worse if the stresses are in an area that hasnt warmed up yet.
other babble to throw around:
Fracture toughness (KIC): ability of a metal to prevent a preexisting cra=
ck from
propogating under a given tensile stress level.
Thermal stresses: tensile stresses due to temperature difference across a=
n
object.
side note: there are very specific rules for running reactors that govern=
rates
that you can heat up/cool down. they get much more restrictive the colder=
you
go. reactors arent much different than engines, as both are just hunks of=
metal.
HTH
Al
Allyn Malventano, ETC(SS), USN
87 Rieger GTO Scirocco 16v (daily driver, 180k, rocco #6)
86 Kamei Twin 16V Turbo Scirocco GTX ('it has begun', rocco #7)
86.5 Occo 16v Trailer (dotting 'i's across the country, rocco #8)
87 Jetta 8v Wolfsburg 2dr (daily driver, 260k, 0 rattles, original clutch=
,
driveshafts, wheels :)
----- Original Message -----
From: "Vince Royer" <vince@performancecarstereo.com>
To: "Scirocco List" <scirocco-L@scirocco.org>
Sent: Friday, October 04, 2002 2:40 PM
Subject: What would this do...
> Hey guys,
>
> Just a little fun question to throw at you. Does anybody have any deta=
iled
> examples of what might happen If I were to run my motor at really high =
RPM's
> while it's cold, perhaps repeatedly.
>
> I'm looking for things like metal chips in the oil, loss of compression=
,
> etc. I need realistic answers to things that would actually happen, so=
that
> I can explain them as if they did happen and somebody would believe me,=
even
> a mechanic, or an insurance adjuster or something.
>
> Go nuts.
>
> Vince
>
>
> _______________________________________________
> Scirocco-l mailing list
> Scirocco-l@scirocco.org
> http://neubayern.net/mailman/listinfo/scirocco-l
_______________________________________________
Scirocco-l mailing list
Scirocco-l@scirocco.org
http://neubayern.net/mailman/listinfo/scirocco-lGet more from the Web. F=
REE MSN Explorer download : http://explorer.msn.com
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<HTML><BODY STYLE=3D"font:10pt verdana; border:none;"><DIV>Someone sounds=
like they know a bit about Mechanical Engineering. I am an ME stud=
ent at Colorado State, what you said very true.</DIV> <DIV> </DIV> <=
DIV>Most of the few times i've seen people do this, the first thing =
that usually starts to go is their piston rings... especially when they d=
o something stupid like run that Valvoline VR-1 Racing oil in a 20w-50 in=
the Dead of winter in colorado at 5:30 in the morning. (come one n=
ow...some of you i'm sure have a cousin or something that did this i=
n their Mazda Protege...mine did...dumbass).</DIV> <DIV> </DIV> <DIV=
>-Brando </DIV> <DIV> </DIV> <BLOCKQUOTE 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 Mes=
sage -----</DIV> <DIV style=3D"BACKGROUND: #e4e4e4; COLOR: black; FONT: 1=
0pt Arial"><B>From:</B> Allyn</DIV> <DIV style=3D"FONT: 10pt Arial"><B>Se=
nt:</B> Friday, October 04, 2002 2:18 PM</DIV> <DIV style=3D"FONT: 10pt A=
rial"><B>To:</B> Vince Royer; Scirocco List</DIV> <DIV style=3D"FONT: 10p=
t Arial"><B>Subject:</B> Re: What would this do... (technobabble)</DIV> <=
DIV> </DIV>1. when cold, the oil is too viscous. in extreme cases, i=
ts so thick that it<BR>cant properly flow into areas of tight tolerance, =
resulting in those areas<BR>wearing. keep that up a few times and eventua=
lly you have something major go.<BR>2. your engine does not warm up evenl=
y. during the warmup process there are<BR>large differences in temperatur=
e across the thick portions of the block/head.<BR>this temperature differ=
ence results in high tensile stresses in some areas.<BR>throwing high rpm=
stresses in there may be enough to make some preexisting flaw<BR>start s=
preading into a large crack.<BR>3. operation at high rpm implies faster h=
eatup of the metal (due to faster<BR>combustion/friction/etc), making the=
temperature difference greater, and the<BR>tensile stresses (#2) even hi=
gher.<BR>4. when cold, metal has a lower stress point where it will fract=
ure. this makes<BR>#2 even worse if the stresses are in an area that hasn=
t warmed up yet.<BR><BR>other babble to throw around:<BR>Fracture toughne=
ss (KIC): ability of a metal to prevent a preexisting crack from<BR>propo=
gating under a given tensile stress level.<BR>Thermal stresses: tensile s=
tresses due to temperature difference across an<BR>object.<BR><BR>side no=
te: there are very specific rules for running reactors that govern rates<=
BR>that you can heat up/cool down. they get much more restrictive the col=
der you<BR>go. reactors arent much different than engines, as both are ju=
st hunks of metal.<BR><BR>HTH<BR>Al<BR><BR>Allyn Malventano, ETC(SS), USN=
<BR>87 Rieger GTO Scirocco 16v (daily driver, 180k, rocco #6)<BR>86 Kamei=
Twin 16V Turbo Scirocco GTX ('it has begun', rocco #7)<BR>86.5 Occo 16v =
Trailer (dotting 'i's across the country, rocco #8)<BR>87 Jetta 8v Wolfsb=
urg 2dr (daily driver, 260k, 0 rattles, original clutch,<BR>driveshafts, =
wheels :)<BR><BR>----- Original Message -----<BR>From: "Vince Royer" <=
vince@performancecarstereo.com><BR>To: "Scirocco List" <scirocco-L@=
scirocco.org><BR>Sent: Friday, October 04, 2002 2:40 PM<BR>Subject: Wh=
at would this do...<BR><BR><BR>> Hey guys,<BR>><BR>> Just a litt=
le fun question to throw at you. Does anybody have any detailed<BR>=
> examples of what might happen If I were to run my motor at really hi=
gh RPM's<BR>> while it's cold, perhaps repeatedly.<BR>><BR>> I'm=
looking for things like metal chips in the oil, loss of compression,<BR>=
> etc. I need realistic answers to things that would actually ha=
ppen, so that<BR>> I can explain them as if they did happen and somebo=
dy would believe me, even<BR>> a mechanic, or an insurance adjuster or=
something.<BR>><BR>> Go nuts.<BR>><BR>> Vince<BR>><BR>>=
;<BR>> _______________________________________________<BR>> Scirocc=
o-l mailing list<BR>> Scirocco-l@scirocco.org<BR>> http://neubayern=
.net/mailman/listinfo/scirocco-l<BR><BR><BR>_____________________________=
__________________<BR>Scirocco-l mailing list<BR>Scirocco-l@scirocco.org<=
BR>http://neubayern.net/mailman/listinfo/scirocco-l<BR></BLOCKQUOTE></BOD=
Y></HTML><br clear=3Dall><hr>Get more from the Web. FREE MSN Explorer do=
wnload : <a href=3D'http://explorer.msn.com'>http://explorer.msn.com</a><=
br></p>
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