GrandAmGT.com Forum
http://www.pfyc.com GrandAmGT.com Premium Memership Signup
RotorsOnline.com   

Go Back   GrandAmGT.com Forum > GAGT - Technical - Sponsored by www.MilzyMotorSports.com > Technical Q&A

Reply
 
Thread Tools Display Modes
Old 01-31-2005, 12:51 PM   #1
timSSmokedGT1
GAGT - Newbie
 
Join Date: Jan 2005
Location: Youngstown, Ohio
Age: 33
Posts: 1
Vehicle: 2004 Grand Am GT
timSSmokedGT1 Gettin' there
Send a message via AIM to timSSmokedGT1
Question what is the size of the stock exhaust pipe

i am looking @ getting a borla exhaust system for my car but i wondered what inlet and outlet i would need ?
timSSmokedGT1 is offline   Reply With Quote
Old 01-31-2005, 12:54 PM   #2
Kdawg207
BIG PAPPA PUMP
 
Kdawg207's Avatar
 
AKA: Go Away
Join Date: Mar 2002
Location: NY/NJ Depends What Day You Ask
Age: 42
Posts: 4,872
Vehicle: Take a f*ckn guess
Kdawg207 has disabled reputation
too small...

if you are getting a borla cat back...no worries....

you are just getting the muffler i would assume?
__________________

31 Free Magazines and counting....the boards wont let me make any new Freebie threads -
so I won't be sharing any longer

Check Out My Car Domain 08 Malibu LS 3.5 V6
Quote:
Originally Posted by Graxall View Post
your a snippy broad arent u
Kdawg207 is offline   Reply With Quote
Old 01-31-2005, 03:09 PM   #3
CoopGT
Guest
 
Posts: n/a
If your getting the hole catback system don't worry it bolts right up.
  Reply With Quote
Old 01-31-2005, 03:09 PM   #4
Kdawg207
BIG PAPPA PUMP
 
Kdawg207's Avatar
 
AKA: Go Away
Join Date: Mar 2002
Location: NY/NJ Depends What Day You Ask
Age: 42
Posts: 4,872
Vehicle: Take a f*ckn guess
Kdawg207 has disabled reputation
...sorta what i already said no?
__________________

31 Free Magazines and counting....the boards wont let me make any new Freebie threads -
so I won't be sharing any longer

Check Out My Car Domain 08 Malibu LS 3.5 V6
Quote:
Originally Posted by Graxall View Post
your a snippy broad arent u
Kdawg207 is offline   Reply With Quote
Old 01-31-2005, 03:27 PM   #5
Ant
LS2 - Member
 
Ant's Avatar
 
AKA: Anthony
Join Date: May 2003
Location: DC metro area
Age: 31
Posts: 2,251
Vehicle: S5/GTO
Ant a trusted member
Send a message via AIM to Ant
2.25
__________________
USAF

-06 IBM GTO/M6 - 477 WHP
Best e/t before H/C - 12.71 @ 111.77
-18 Audi S5 Prestige Navarra Blue/A8 - DTUK Tuned
12.14 @ 111.19
Ant is offline   Reply With Quote
Old 03-02-2005, 08:42 PM   #6
mike2002
GAGT - Member
 
Join Date: Oct 2004
Location: rosemount
Age: 34
Posts: 158
Vehicle: 2001 alero gls
mike2002 Gettin' there
Quote:
Originally Posted by Ant
2.25
im replacing the exhaust on a 2001 alero GLS, 3400. and the stock exhaust is 1 7/8"....i just looked at it 20 minutes ago while changing the oil

did gagt's get 2.25's, and ga se's / alero's get 1.875.

im getting pressure bent, custom, either 2.25 or 2.5
mike2002 is offline   Reply With Quote
Old 03-03-2005, 11:43 AM   #7
atc3434
Grand Am Again
 
atc3434's Avatar
 
AKA: Andrew
Join Date: Apr 2003
Location: Auburn, NY
Age: 35
Posts: 1,999
Vehicle: 1999 Grand Am SE
atc3434 Gettin' there
Send a message via AIM to atc3434
Quote:
Originally Posted by mike2002
im replacing the exhaust on a 2001 alero GLS, 3400. and the stock exhaust is 1 7/8"....i just looked at it 20 minutes ago while changing the oil

did gagt's get 2.25's, and ga se's / alero's get 1.875.

im getting pressure bent, custom, either 2.25 or 2.5
1 & 7/8th's is the suck! I didn't know Aleros were so restricted. You're sure thats the size it is? Not doubting, as I've never looked under an Alero, but I would have figured it would be the same as the GA... GM doesn't usually cramp exhausts too bad.
__________________

1999 Grand Am SE2 - Blue, TOG Headers, SLP Exhaust, DHP - SOLD
1996 Vert' Z-28 - M6, magnaflow muffler-back, K&N FIPK, Hurst Short-throw - 13.6 @ 103mph.

2006 Dodge Charger R/T Daytona - Go Mango Orange #2832 of 4000. Tune/exhaust. 14.009@97mph.
2002 Saab 9 5 Aero Wagon - 3" turboback/tune. 17psi of sleeper fun just waiting to surprise you.
atc3434 is offline   Reply With Quote
Old 03-03-2005, 05:52 PM   #8
mike2002
GAGT - Member
 
Join Date: Oct 2004
Location: rosemount
Age: 34
Posts: 158
Vehicle: 2001 alero gls
mike2002 Gettin' there
100% sure it is. first i noticed it was so small, i can EASILY close my hand around it, i cant rap my hand around a 2 1/4" id pipe. so i measured the circumfrance and figured it all out to be 1.85 (1.875 is 1 7/8, my measurements where a little off)

so your saying yours was for sure 2.25 stock? im 99% sure the alero's and grandam use the exact same exhaust. i know the GT's different, maybe thats the confusion, GT's get 2.25, everyone else gets 1.875? i dont know, but a 2001 3400 alero has 1.875".

im having my exhaust put on tomorrow, most likely 2.25 pressure bent, ill see if they have 2.375" because that would fit around the muffler

i just think 2.5 is to big....ive got a pushrod v6 with 170hp, that will never see above 200 crank HP, intake, exhaust, dhp is all my car will ever see

2.5 is what they recommend for a near stock or very slightly modified GTP, and im 100hp short of a near stock GTP.
mike2002 is offline   Reply With Quote
Old 03-03-2005, 06:11 PM   #9
atc3434
Grand Am Again
 
atc3434's Avatar
 
AKA: Andrew
Join Date: Apr 2003
Location: Auburn, NY
Age: 35
Posts: 1,999
Vehicle: 1999 Grand Am SE
atc3434 Gettin' there
Send a message via AIM to atc3434
Well, I think 3" would be too big, but 2.5" isn't going to hurt the 3400, it's still small enough to develop good scavenging at lower rpms, and it will flow better on the topend than a smaller exhaust. And yea, I'm positive my stock exhaust was 2.25", I had done just a muffler for a while, it was 2.25 when I measured it. If guys have found gains w/ a better muffler and 2.5", I'd say thats the way to go. Mine ran better w/ the SLP.
__________________

1999 Grand Am SE2 - Blue, TOG Headers, SLP Exhaust, DHP - SOLD
1996 Vert' Z-28 - M6, magnaflow muffler-back, K&N FIPK, Hurst Short-throw - 13.6 @ 103mph.

2006 Dodge Charger R/T Daytona - Go Mango Orange #2832 of 4000. Tune/exhaust. 14.009@97mph.
2002 Saab 9 5 Aero Wagon - 3" turboback/tune. 17psi of sleeper fun just waiting to surprise you.
atc3434 is offline   Reply With Quote
Old 03-03-2005, 06:24 PM   #10
mike2002
GAGT - Member
 
Join Date: Oct 2004
Location: rosemount
Age: 34
Posts: 158
Vehicle: 2001 alero gls
mike2002 Gettin' there
that sucks that they did that to us alero owners...., because i see you have a SE, they have the same ratings as our alero's for power...oh well, ill just see bigger gains i think ill see if they can fit a 2.5" pressure bent pipe up there, when they were looking at it before, they said it would be tough...my muffler is a 2.25" ID, but i dont think it will be a bottle neck, its a strait through magnaflow. the biggest bottle necks would probalby be the bends, since a 2.5 probably gets to around 2.125 at the bends

could be a year thing too....99's did have some differences over the later years
mike2002 is offline   Reply With Quote
Old 03-03-2005, 10:04 PM   #11
MetaGTP1
Guest
 
Posts: n/a
Quote:
Originally Posted by mike2002
that sucks that they did that to us alero owners...., because i see you have a SE, they have the same ratings as our alero's for power...oh well, ill just see bigger gains i think ill see if they can fit a 2.5" pressure bent pipe up there, when they were looking at it before, they said it would be tough...my muffler is a 2.25" ID, but i dont think it will be a bottle neck, its a strait through magnaflow. the biggest bottle necks would probalby be the bends, since a 2.5 probably gets to around 2.125 at the bends

could be a year thing too....99's did have some differences over the later years
Why not mandrel-bent pipes?
  Reply With Quote
Old 03-03-2005, 10:26 PM   #12
mike2002
GAGT - Member
 
Join Date: Oct 2004
Location: rosemount
Age: 34
Posts: 158
Vehicle: 2001 alero gls
mike2002 Gettin' there
i dont think a regular exhaust shop can do those... i was under the impression that its a very very expensive machine that most places dont have

ill see if they have 2 3/8" LOL, thats a good compermise!
mike2002 is offline   Reply With Quote
Old 03-03-2005, 10:53 PM   #13
AznGA
GAGT - Junkie
 
AKA: YJ
Join Date: Nov 2002
Location: Midwest
Posts: 4,440
Vehicle: GAGT
AznGA Gettin' there
Ya, SLP used to sell just the pipings (2.5" mandrel bent) but they do not sell those anymore. Local shops can charge you a lot for mandrel bent pipes.
AznGA is offline   Reply With Quote
Old 03-03-2005, 11:10 PM   #14
GrahamKracka
WannaBe Fat Kid
 
GrahamKracka's Avatar
 
AKA: Richard
Join Date: Aug 2004
Location: San Antonio, Texas
Age: 33
Posts: 1,517
Vehicle: 2005 Nissan Titan
GrahamKracka Gettin' there
Send a message via AIM to GrahamKracka
the gt stock exhaust is 2.25...and yes the borla would bolt right up
GrahamKracka is offline   Reply With Quote
Old 03-04-2005, 12:28 AM   #15
sprague67
2000 GT1
 
sprague67's Avatar
 
AKA: Todd
Join Date: Nov 2004
Location: Cedar Falls, Iowa
Age: 34
Posts: 243
Vehicle: 2000 GT1 Coupe
sprague67 Gettin' there
I also did not know that Alero's were that small, damn.
sprague67 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 08:35 PM.


Powered by vBulletin® Version 3.7.2
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright 2011 GrandAmGT.com
RotorsOnline.com