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Compression question
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Gary,
Poking fun at Patrick is my job, just ask him. Since he is my running =
buddy and we are always working on each others car he will know what I =
meant. I poke fun of no individual that I don't know, that would be =
rude.
And correct you are about swept volume, now be detail the factors that =
are needed to calculate the compression ratio.
Brian
no poking fun just want more info, I already know but the are ours that =
can learn form our thread
----- Original Message -----=20
From: worldcyclist=20
To: Brian Wagner=20
Cc: Patrick Bureau ; scirocco-l@scirocco.org ; scourge@cogeco.ca=20
Sent: Wednesday, May 07, 2003 7:16 PM
Subject: Re: Compression question
Just to be clear: compression ratio is the displacement difference =
between cyclinder swept volume VS the head's volume. It is not based =
from atmospheric pressures.=20
Another point:=20
I don't see any reason to poke fun at people. If someone has something =
to add, that is great, but "ribbing" is not very polite, especially when =
it comes to insulting one's intelligence. I think we were all tought (or =
should have been) that if you don't have anything good to say then =
don't.=20
I'd rather not get pointless emails in my inbox of that nature......=20
Gary=20
Brian Wagner wrote:=20
Wow he is scary smart. LOL=20
Patrick Bureau <txrocco@sbcglobal.net> wrote:=20
I dont think you calculate piston compression and=20
compression reatio that way..=20
My 8v 1.8: stck ran 160 PSI on all four pistons=20
(bentley tells 145-174 average for new engine) but it=20
still only 8.5:1 compression ratio. (ie: 8.5 times the=20
weight of earth's atmostphere (which is the base=20
xx:1).=20
VW engines which came stock in a Scirocco, or are a=20
popular replacement=20
Typical Name & Code Bore (mm) Stroke (mm) Year / Model=20
available HP@RPM / TQ@RPM CR=20
1.8L JH 8v 81 86.4 83-89 90@5500 / 100@3000 8.5:1=20
1.8L GX 8v 81 86.4 Fox 85@5250 / 96@3000 8.5:1=20
1.8L PL 16v 81 86.4 86.5-92 Scirocco (88 USA, 89=20
Canada, 92 Europe) 123@5800 / 120@4250 10:1=20
2.0L 9A 16v 82.5 92.8 90 - 92 Passats / Golfs / Jettas=20
134@5800 / 133@4400 10.8:1=20
2.0L ABA 8v 82.5 92.8 93-98 Golf / Jetta / Cabrio=20
115@5250 / 122@3250 10.5:1=20
Note that all the engines up to the first 1.8L have=20
136mm rods, while the later motors have 144mm rods=20
look it up on the net.. my numbers are pretty close to=20
what it is all about.=20
=20
--- worldcyclist wrote:=20
> I've got some firsthand experience that might be=20
> helpful.=20
> My 1.8 16V with stock cam timing gave 150psi doing a=20
> compression test.=20
> With the cam advanced 8* it was 175psi. Otherwise=20
> it's 10-1 in terms of=20
> ratios.=20
> The JH engine I had was 135psi or 8.5-1.=20
> The Alfa with 9.5-1 gives me 173 psi with stock cams=20
> and timing.=20
>=20
> An interesting site is www.smokemup.com=20
> they have GUI programs to play with stuff like this,=20
> plus more.=20
>=20
> Gary=20
> 87 16V Scirocco (FS $975)=20
> 80 Callaway Stage 3 Rocco=20
> 91 Alfa Romeo 3.0 V6 5spd, lowered=20
>=20
> Message: 57=20
> From: "Scourge" =20
> To: "Rocco list" =20
> Subject:=20
> Date: Mon, 5 May 2003 18:33:42 -0400=20
>=20
> This is a multi-part message in MIME format.=20
>=20
> ------=3D_NextPart_000_0007_01C31334.DABF40A0=20
> Content-Type: text/plain;=20
> charset=3D"iso-8859-1"=20
> Content-Transfer-Encoding: quoted-printable=20
>=20
> Hey=20
>=20
> Just curious, what the stock compression on 16v's?=20
> 2.0 and 18=20
> And what about a stock jh?=20
>=20
> I think it's in the high 8's or low 9's for the jh.=20
> Does a 1.8 16v head=20
> =3D=20
> on a 2.0 16v actually increase compression?=20
>=20
>=20
> thanx=20
>=20
> -The George=20
>=20
>=20
> > begin:vcard=20
> n:F;Gary=20
> tel;work:541.334.8485=20
> x-mozilla-html:FALSE=20
>=20
url:http://home.earthlink.net/~worldcyclist/index.html=20
> org:World Cyclist=20
> adr:;;;Eugene;OR;;=20
> version:2.1=20
> email;internet:worldcyclist@earthlink.net=20
> note;quoted-printable:Lots of bikes and parts for=20
> sale=3D0D=3D0Aand=3D0D=3D0ARV- Eagle 05 Conversion for=20
> $18,900=20
> fn:World Cyclist=20
> end:vcard=20
>=20
=20
_______________________________________________=20
Scirocco-l mailing list=20
Scirocco-l@scirocco.org=20
http://neubayern.net/mailman/listinfo/scirocco-l
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<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>Gary,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Poking fun at Patrick is my job, just =
ask him.=20
Since he is my running buddy and we are always working on each others =
car he=20
will know what I meant. I poke fun of no individual that I don't know, =
that=20
would be rude.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>And correct you are about swept volume, =
now be=20
detail the factors that are needed to calculate the compression=20
ratio.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Brian</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>no poking fun just want more info, I =
already know=20
but the are ours that can learn form our thread</FONT></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-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 title=3Dworldcyclist@earthlink.net=20
href=3D"mailto:worldcyclist@earthlink.net";>worldcyclist</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dbrian_wagner@sbcglobal.net=20
href=3D"mailto:brian_wagner@sbcglobal.net";>Brian Wagner</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Cc:</B> <A =
title=3Dtxrocco@sbcglobal.net=20
href=3D"mailto:txrocco@sbcglobal.net";>Patrick Bureau</A> ; <A=20
title=3Dscirocco-l@scirocco.org=20
href=3D"mailto:scirocco-l@scirocco.org";>scirocco-l@scirocco.org</A> ; =
<A=20
title=3Dscourge@cogeco.ca =
href=3D"mailto:scourge@cogeco.ca";>scourge@cogeco.ca</A>=20
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Wednesday, May 07, 2003 =
7:16=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: Compression =
question</DIV>
<DIV><BR></DIV>Just to be clear: compression ratio is the displacement =
difference between cyclinder swept volume VS the head's volume. It is =
not=20
based from atmospheric pressures.=20
<P>Another point: <BR>I don't see any reason to poke fun at people. If =
someone=20
has something to add, that is great, but "ribbing" is not very polite, =
especially when it comes to insulting one's intelligence. I think we =
were all=20
tought (or should have been) that if you don't have anything good to =
say then=20
don't.=20
<P>I'd rather not get pointless emails in my inbox of that =
nature......=20
<P>Gary=20
<P>Brian Wagner wrote:=20
<BLOCKQUOTE TYPE=3D"CITE">Wow he is scary smart. LOL=20
<P><B><I>Patrick Bureau <txrocco@sbcglobal.net></I></B> wrote: =
<BLOCKQUOTE=20
style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff =
2px solid">I=20
dont think you calculate piston compression and <BR>compression =
reatio=20
that way..=20
<P>My 8v 1.8: stck ran 160 PSI on all four pistons <BR>(bentley =
tells=20
145-174 average for new engine) but it <BR>still only 8.5:1 =
compression=20
ratio. (ie: 8.5 times the <BR>weight of earth's atmostphere (which =
is the=20
base <BR>xx:1).=20
<P>VW engines which came stock in a Scirocco, or are a <BR>popular =
replacement <BR>Typical Name & Code Bore (mm) Stroke (mm) Year =
/ Model=20
<BR>available HP@RPM / TQ@RPM CR=20
<P>1.8L JH 8v 81 86.4 83-89 90@5500 / 100@3000 8.5:1 <BR>1.8L GX =
8v 81=20
86.4 Fox 85@5250 / 96@3000 8.5:1 <BR>1.8L PL 16v 81 86.4 86.5-92 =
Scirocco=20
(88 USA, 89 <BR>Canada, 92 Europe) 123@5800 / 120@4250 10:1 =
<BR>2.0L 9A=20
16v 82.5 92.8 90 - 92 Passats / Golfs / Jettas <BR>134@5800 / =
133@4400=20
10.8:1 <BR>2.0L ABA 8v 82.5 92.8 93-98 Golf / Jetta / Cabrio =
<BR>115@5250=20
/ 122@3250 10.5:1=20
<P>Note that all the engines up to the first 1.8L have <BR>136mm =
rods,=20
while the later motors have 144mm rods=20
<P>look it up on the net.. my numbers are pretty close to <BR>what =
it is=20
all about. <BR> =20
<P>--- worldcyclist <WORLDCYCLIST@EARTHLINK.NET>wrote: =
<BR>> I've=20
got some firsthand experience that might be <BR>> helpful. =
<BR>> My=20
1.8 16V with stock cam timing gave 150psi doing a <BR>> =
compression=20
test. <BR>> With the cam advanced 8* it was 175psi. Otherwise =
<BR>>=20
it's 10-1 in terms of <BR>> ratios. <BR>> The JH engine I =
had was=20
135psi or 8.5-1. <BR>> The Alfa with 9.5-1 gives me 173 psi =
with stock=20
cams <BR>> and timing. <BR>> <BR>> An interesting site is =
www.smokemup.com <BR>> they have GUI programs to play with =
stuff like=20
this, <BR>> plus more. <BR>> <BR>> Gary <BR>> 87 16V =
Scirocco=20
(FS $975) <BR>> 80 Callaway Stage 3 Rocco <BR>> 91 Alfa =
Romeo 3.0 V6=20
5spd, lowered <BR>> <BR>> Message: 57 <BR>> From:=20
"Scourge" <SCOURGE@COGECO.CA> <BR>> To: "Rocco=20
list" <SCIROCCO-L@SCIROCCO.ORG> <BR>> Subject: <BR>> =
Date: Mon,=20
5 May 2003 18:33:42 -0400 <BR>> <BR>> This is a multi-part =
message=20
in MIME format. <BR>> <BR>>=20
------=3D_NextPart_000_0007_01C31334.DABF40A0 <BR>> =
Content-Type:=20
text/plain; <BR>> charset=3D"iso-8859-1" <BR>>=20
Content-Transfer-Encoding: quoted-printable <BR>> <BR>> Hey =
<BR>>=20
<BR>> Just curious, what the stock compression on 16v's? =
<BR>> 2.0=20
and 18 <BR>> And what about a stock jh? <BR>> <BR>> I =
think it's=20
in the high 8's or low 9's for the jh. <BR>> Does a 1.8 16v =
head=20
<BR>> =3D <BR>> on a 2.0 16v actually increase compression? =
<BR>>=20
<BR>> <BR>> thanx <BR>> <BR>> -The George <BR>> =
<BR>>=20
<BR>> > begin:vcard <BR>> n:F;Gary <BR>> =
tel;work:541.334.8485=20
<BR>> x-mozilla-html:FALSE <BR>> <BR>url:<A=20
=
href=3D"http://home.earthlink.net/~worldcyclist/index.html";>http://home.e=
arthlink.net/~worldcyclist/index.html</A>=20
<BR>> org:World Cyclist <BR>> adr:;;;Eugene;OR;; <BR>>=20
version:2.1 <BR>> email;internet:worldcyclist@earthlink.net =
<BR>>=20
note;quoted-printable:Lots of bikes and parts for <BR>>=20
sale=3D0D=3D0Aand=3D0D=3D0ARV- Eagle 05 Conversion for <BR>> =
$18,900 <BR>>=20
fn:World Cyclist <BR>> end:vcard <BR>> <BR> =20
<P>_______________________________________________ <BR>Scirocco-l =
mailing=20
list <BR>Scirocco-l@scirocco.org <BR><A=20
=
href=3D"http://neubayern.net/mailman/listinfo/scirocco-l";>http://neubayer=
n.net/mailman/listinfo/scirocco-l</A></P></BLOCKQUOTE></BLOCKQUOTE></BLOC=
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