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exhaust

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Ryan, we just answered this question for TBerk just a couple of days ago.
The short answer is that your 8v will be perfectly happy with a 2.0"
exhaust. If it is a worked 2.0l, then the 2.25" size will work fine. Dont'
expect big gains from it versus the 2.0l", however. A 2.5" would be a huge
mistake. You could kiss your torque goodbye.

No change to the exhaust manifold is necessary to fit a catback exhaust.
However, if you've got the wretched "log" (4/1) manifold on there, you'll do
best to replace it with a 4/2 manifold and Techtonics (or similar) downpipe.
The biggest gains that you'll ever get on an 8v motor will come from this
modification. The 4/2 manifolds are found on the 1.7l and smaller motors.
With the better manifold, proper downpipe, and 2.0" exhaust, you'll probably
pick up an instant 20hp or so. Throw a G-cam in there while you're at it,
and you'll have another 5 horses to play with.

Nothing else delivers this much bang for the buck, so go for it without
hesitation.
--
Scott F. Williams
NJ Scirocco nut
'99 Subaru Impreza 2.5 RS
Mazda 323 GTX turbo "assaulted" vehicle
Golf GTI 16v "rollycar"
ClubVAC: "Roads found. Drivers wanted."

Check out our rally team's website!
http://www.usrallyteam.com
  -----Original Message-----
  From: scirocco-l-admin@scirocco.org
[mailto:scirocco-l-admin@scirocco.org]On Behalf Of Ryan Ruggles
  Sent: Thursday, February 14, 2002 2:38 PM
  To: scirocco-l@scirocco.org
  Subject: exhaust


  How much improvement will changing my stock 8V exhaust to a 2" or 2.5"
pipe?  Do I have to change the manifold?

  Ryan

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<BODY bgColor=3D#ffffff>
<DIV><SPAN class=3D190244319-14022002><FONT face=3DArial color=3D#0000ff =
size=3D2>Ryan,=20
we just answered this question for TBerk just a couple of days ago. The =
short=20
answer is that your 8v will be perfectly happy with a 2.0" exhaust. If =
it is a=20
worked 2.0l, then the 2.25" size will work fine. Dont' expect big gains =
from it=20
versus the 2.0l", however. A 2.5" would be a huge mistake. You could =
kiss your=20
torque goodbye.</FONT></SPAN></DIV>
<DIV><SPAN class=3D190244319-14022002><FONT face=3DArial color=3D#0000ff =

size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D190244319-14022002><FONT face=3DArial color=3D#0000ff =
size=3D2>No=20
change to the exhaust manifold is necessary to fit a catback exhaust. =
However,=20
if you've got the wretched "log" (4/1) manifold on there, you'll do best =
to=20
replace it with a 4/2 manifold and Techtonics (or similar) downpipe. The =
biggest=20
gains that you'll ever get on an 8v motor will come from this =
modification. The=20
4/2 manifolds are found on the 1.7l and smaller motors. With the better=20
manifold, proper downpipe, and 2.0" exhaust, you'll probably pick up an =
instant=20
20hp or so. Throw a G-cam in there while you're at it, and you'll have =
another 5=20
horses to play with.</FONT></SPAN></DIV>
<DIV><SPAN class=3D190244319-14022002><FONT face=3DArial color=3D#0000ff =

size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D190244319-14022002><FONT face=3DArial color=3D#0000ff =

size=3D2>Nothing else delivers this much bang for the buck, so go for it =
without=20
hesitation.<BR></FONT></SPAN><FONT size=3D2>--<BR>Scott F. =
Williams<BR>NJ Scirocco=20
nut<BR>'99 Subaru Impreza 2.5 RS<BR>Mazda 323 GTX turbo "assaulted"=20
vehicle<BR>Golf GTI 16v "rollycar"<BR>ClubVAC: "Roads found. Drivers=20
wanted."<BR><BR>Check out our rally team's website!<BR><A=20
href=3D"http://www.usrallyteam.com/"=20
target=3D_blank>http://www.usrallyteam.com</A></FONT> </DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px =
solid; MARGIN-RIGHT: 0px">
  <DIV class=3DOutlookMessageHeader dir=3Dltr align=3Dleft><FONT =
face=3DTahoma=20
  size=3D2>-----Original Message-----<BR><B>From:</B>=20
  scirocco-l-admin@scirocco.org =
[mailto:scirocco-l-admin@scirocco.org]<B>On=20
  Behalf Of </B>Ryan Ruggles<BR><B>Sent:</B> Thursday, February 14, 2002 =
2:38=20
  PM<BR><B>To:</B> scirocco-l@scirocco.org<BR><B>Subject:</B>=20
  exhaust<BR><BR></FONT></DIV>
  <DIV><FONT face=3DArial size=3D2>How much improvement will changing my =
stock 8V=20
  exhaust to a 2" or 2.5" pipe?&nbsp; Do I have to change the=20
  manifold?</FONT></DIV>
  <DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
  <DIV><FONT face=3DArial =
size=3D2>Ryan</FONT></DIV></BLOCKQUOTE></BODY></HTML>

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