Riviera Performance
Would you like to react to this message? Create an account in a few clicks or log in to continue.

The 8th Gen Riviera Resource
 
HomeDashboardSearchRiviera Questions & AnswersWrite-Ups IndexRegisterRelated LinksLog in

 

 got my exhaust done today

Go down 
AuthorMessage
Jeremy
Amateur


Name : Jeremy
Age : 34
Location : Hattiesburg, MS
Joined : 2008-03-25
Post Count : 48
Merit : 0

got my exhaust done today Empty
PostSubject: got my exhaust done today   got my exhaust done today EmptyWed Apr 09, 2008 10:18 pm

So I went to my local muffler shop this morning and asked the guy wat he thought i should do to open my exhaust up a little. Well to say that the emissions laws are lax here in Mississippi is the understatement of the year, so he nixed my stock converter and resonator, left my stock mufflers and just welded on some new rolled tips. It looks very clean out back now, and the exhaust note is about like a GTP grand prix is. I have not had a SES light to come on yet, nor have i really felt a significant decrease in low end torque. I am just preparing for my pulley swap and intake so hopefully the extra engine mods will make up for the slight drop in off the line torque.
Back to top Go down
IBx1
Expert
IBx1

Name : ILAN
Age : 29
Location : College Station, TX
Joined : 2007-12-30
Post Count : 4304
Merit : 69

got my exhaust done today Empty
PostSubject: Re: got my exhaust done today   got my exhaust done today EmptyWed Apr 09, 2008 10:22 pm

Post some pics when you can!
Back to top Go down
AA
Administrator
AA

Name : Aaron
Age : 43
Location : C-bus, Ohio
Joined : 2007-01-13
Post Count : 18417
Merit : 245

got my exhaust done today Empty
PostSubject: Re: got my exhaust done today   got my exhaust done today EmptyThu Apr 10, 2008 10:04 am

Did you notice if there was another O2 sensor downstream from the cat?

_________________
'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'05 GTO • 85k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26
Because fun


'70 Olds Ninety-Eight Holiday Coupe • 116k miles • 455 Rocket V8
Because cool


'95 Celica • 152k miles • 0-60: yes
Because free
Back to top Go down
http://www.cardomain.com/ride/657082/4
robotennis61
Guru
robotennis61

Name : robotennis
Age : 58
Location : las vegas
Joined : 2007-12-17
Post Count : 5561
Merit : 142

got my exhaust done today Empty
PostSubject: Re: got my exhaust done today   got my exhaust done today EmptyThu Apr 10, 2008 12:12 pm

have you noticed any highway drone? i was looking at the res last night,and wondering if i should cut it off,but i hate drone noise...
Back to top Go down
IBx1
Expert
IBx1

Name : ILAN
Age : 29
Location : College Station, TX
Joined : 2007-12-30
Post Count : 4304
Merit : 69

got my exhaust done today Empty
PostSubject: Re: got my exhaust done today   got my exhaust done today EmptyThu Apr 10, 2008 1:26 pm

AA wrote:
Did you notice if there was another O2 sensor downstream from the cat?

Jeremy has a '95 SI. Correct me if I'm wrong, but if I'm not mistaken the major difference between the Series I and the Series II is that second O2 sensor, which increases efficiency and high-end horsepower. The Series I only has the one O2 sensor, while the Series II has that second one.

I could be mistaken, but I think I heard that somewhere on this site.
Back to top Go down
AA
Administrator
AA

Name : Aaron
Age : 43
Location : C-bus, Ohio
Joined : 2007-01-13
Post Count : 18417
Merit : 245

got my exhaust done today Empty
PostSubject: Re: got my exhaust done today   got my exhaust done today EmptyThu Apr 10, 2008 1:32 pm

There are far bigger differences than that, like the blower and exhaust manifold design.

The second O2 sensor sets off the code for bad or no cat converter. It offers no other purpose, imo. Mine's not being used. wink

_________________
'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'05 GTO • 85k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26
Because fun


'70 Olds Ninety-Eight Holiday Coupe • 116k miles • 455 Rocket V8
Because cool


'95 Celica • 152k miles • 0-60: yes
Because free
Back to top Go down
http://www.cardomain.com/ride/657082/4
Jeremy
Amateur


Name : Jeremy
Age : 34
Location : Hattiesburg, MS
Joined : 2008-03-25
Post Count : 48
Merit : 0

got my exhaust done today Empty
PostSubject: Re: got my exhaust done today   got my exhaust done today EmptySat Apr 12, 2008 3:35 pm

No there was no o2 sensor behind the converter. So far, everythings going well with the engine ie. no ses light as of yet. I must admit now though i am starting to miss the extra torque i lost by freeing up the exhaust, but hopefully i will get it back once my pulleys arrive from Pulley Boys. And there is no drone on the highway at cruising speed- in fact u can barely hear it on the highway. If i were you (and did not live in California) i would say do the same thing.
Back to top Go down
turtleman
Expert
turtleman

Name : Codith
Age : 32
Location : Villa Park, IL
Joined : 2007-02-08
Post Count : 3650
Merit : 138

got my exhaust done today Empty
PostSubject: Re: got my exhaust done today   got my exhaust done today EmptySat Apr 12, 2008 10:53 pm

I'm surprised you are feeling a noticable loss of bottem torque at all. When I did the DP and mandrel 3" back with no cat and no resonator, It really didn't seem like I lost much if any low end. (3.4" pulley) I lost boost though (which is a good thing).

When I was driving my old GA 3.1L with an open downpipe, it had definitely lost a good amount of low end power but this is nothing like that.

I wouldn't expect the MIL to come on with that car being OBDI. It's a bit less sensitive the OBDII in the first place, not to mention no downstream O2 sensor at all.
Back to top Go down
AA
Administrator
AA

Name : Aaron
Age : 43
Location : C-bus, Ohio
Joined : 2007-01-13
Post Count : 18417
Merit : 245

got my exhaust done today Empty
PostSubject: Re: got my exhaust done today   got my exhaust done today EmptySun Apr 13, 2008 12:58 am

If there's no sensor to tip off the PCM, how would it know? The light should stay off.

Codith, you didn't lose the torque with a 3.4", but imagine a 3.8". I do notice a torque loss going from 3.2" to 3.3" to 3.4". It's not a bad thing, though. We almost have too much torque as it is.

_________________
'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'05 GTO • 85k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26
Because fun


'70 Olds Ninety-Eight Holiday Coupe • 116k miles • 455 Rocket V8
Because cool


'95 Celica • 152k miles • 0-60: yes
Because free
Back to top Go down
http://www.cardomain.com/ride/657082/4
robotennis61
Guru
robotennis61

Name : robotennis
Age : 58
Location : las vegas
Joined : 2007-12-17
Post Count : 5561
Merit : 142

got my exhaust done today Empty
PostSubject: Re: got my exhaust done today   got my exhaust done today EmptyWed Jul 09, 2008 11:37 am

i was wondering if a series 1,would do as well with a single muffler,and deleting the second alltogether? would this really affect the cars performance? does it need 2 mufflers anyway?
Back to top Go down
AA
Administrator
AA

Name : Aaron
Age : 43
Location : C-bus, Ohio
Joined : 2007-01-13
Post Count : 18417
Merit : 245

got my exhaust done today Empty
PostSubject: Re: got my exhaust done today   got my exhaust done today EmptyWed Jul 09, 2008 6:49 pm

I think engine performance would be about the same, but weight would be reduced, so overall, single exhaust is the better idea. Most cars that are serious about performance (Camaro SS, WRX, EVO) don't run dual pipes unless it's a true dual system up to the headers (Corvette, GTO, etc.) The added weight isn't worth showing off the look of dual tips unless the car is pushing the luxury angle, or it's a cheaper pony car (Mustang GT, Camaro Z28) where the average buyer wants to look fast on the street but not necessarily go racing every weekend.

_________________
'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'05 GTO • 85k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26
Because fun


'70 Olds Ninety-Eight Holiday Coupe • 116k miles • 455 Rocket V8
Because cool


'95 Celica • 152k miles • 0-60: yes
Because free
Back to top Go down
http://www.cardomain.com/ride/657082/4
robotennis61
Guru
robotennis61

Name : robotennis
Age : 58
Location : las vegas
Joined : 2007-12-17
Post Count : 5561
Merit : 142

got my exhaust done today Empty
PostSubject: Re: got my exhaust done today   got my exhaust done today EmptyWed Jul 09, 2008 9:55 pm

good point AA. i wonder how she will sound though?
Back to top Go down
AA
Administrator
AA

Name : Aaron
Age : 43
Location : C-bus, Ohio
Joined : 2007-01-13
Post Count : 18417
Merit : 245

got my exhaust done today Empty
PostSubject: Re: got my exhaust done today   got my exhaust done today EmptyThu Jul 10, 2008 8:51 am

Duals might sound slightly lower, but I think it has more to do with resonator and muffler design, and pipe diameter. Larger diameter tubes may sound raspier and drone at a higher pitch than narrower ones.

_________________
'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'05 GTO • 85k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26
Because fun


'70 Olds Ninety-Eight Holiday Coupe • 116k miles • 455 Rocket V8
Because cool


'95 Celica • 152k miles • 0-60: yes
Because free
Back to top Go down
http://www.cardomain.com/ride/657082/4
robotennis61
Guru
robotennis61

Name : robotennis
Age : 58
Location : las vegas
Joined : 2007-12-17
Post Count : 5561
Merit : 142

got my exhaust done today Empty
PostSubject: Re: got my exhaust done today   got my exhaust done today EmptyFri Jul 11, 2008 4:12 am

ok. i might just experiment with 1, and then cap off the other just to compare sounds. ill be getting a hooker aero chamber muffler.
Back to top Go down
Sponsored content




got my exhaust done today Empty
PostSubject: Re: got my exhaust done today   got my exhaust done today Empty

Back to top Go down
 
got my exhaust done today
Back to top 
Page 1 of 1
 Similar topics
-
» I got my AACC New Faculty packet today!
» Today's harvest means soup tonight
» Il fait beau! (it was GORGEOUS today!)
» Forty years ago today
» I started my fall crops today.

Permissions in this forum:You cannot reply to topics in this forum
Riviera Performance ::   Supercharged 3800 Tech :: Series I Engine & Transmission-
Jump to: