Page 1 of 1 1
Topic Options
#182608 - 02/16/06 06:06 PM 2.5 vs one of my custom 3 inch exhaust (dyno graphs)
Turbo-charged Offline
Post Master


Registered: 07/02/02
Posts: 2386
this should answer all of your questions on whether or not a 3 inch exhaust is worth while on a turbo car. i previously tuned the car on 12psi and 15psi. with the new exhaust system i couldnt get the boost to go below 15psi.....(lovefab manifold with 38mm wastegate) so it made a perfect over lap of 15psi of 2.5 inch exhaust and 15psi 3 inch exhaust.

car is a stock bore H22 with love fab manifold, stock intake manifold, 2.5 downpipe, a custom 3 inch exhaust i did.....greddy intercooler with very restrictive intercooler piping. 93 octane pump gas. and stock cams



Absolutely NO changes done to the car other than the exhaust. NOTHING.

the little dip in the midrange is from very rich air/fuel in that area. the MSD took a crap during the dyno session so i dint get to clean that up. very minimal timing and rich and safe air fuel. needless to say, he was very pleased with his new exhaust system
_________________________
http://www.tempestracing.net
95 civic coupe 9.51@160

Top
Visit Sponsors! Help CSi !
#182609 - 02/16/06 07:06 PM Re: 2.5 vs one of my custom 3 inch exhaust (dyno graphs)
4doorEG Offline
Post Master Sr


Registered: 11/23/01
Posts: 6098
Loc: Overland Park, KS
That's only because it's a vtec engine

Was this the dual exhaust setup you did for the car?
_________________________
94 Civic Hatch
9.85 @ 155 mph


Top
#182610 - 02/16/06 07:13 PM Re: 2.5 vs one of my custom 3 inch exhaust (dyno graphs)
Turbo-charged Offline
Post Master


Registered: 07/02/02
Posts: 2386
haha! yup thats the one
_________________________
http://www.tempestracing.net
95 civic coupe 9.51@160

Top
#182611 - 02/16/06 10:28 PM Re: 2.5 vs one of my custom 3 inch exhaust (dyno graphs)
SiAdam Moderator Offline
Post Master Supreme


Registered: 07/22/01
Posts: 18810
Loc: West By God Virginia
I am glad you posted this Joe...

Fine example...

_________________________
05 Berlina Black S2000 700whp / 500wtq

Top
#182612 - 02/16/06 10:42 PM Re: 2.5 vs one of my custom 3 inch exhaust (dyno graphs)
SiR Steel Offline
Post Master Sr


Registered: 06/18/01
Posts: 8050
Loc: West Vancouver, BC, Canada
Very impressive! How do you think it will do with a JRSC?
_________________________
2015 BMW 335i xDrive M Performance Edition
1977 British Leyland MINI Modded 1380cc LHD
2005 Piaggio Vespa ET2 Modded 70cc

Top
#182613 - 02/16/06 10:44 PM Re: 2.5 vs one of my custom 3 inch exhaust (dyno graphs)
HCivic02 Offline
Post Master Supreme


Registered: 03/25/03
Posts: 12496
Loc: CA
Quote:

Very impressive! How do you think it will do with a JRSC?




loose you power. Stay with 2.5.
_________________________
Chris
06' Evo IX - E85@29psi
13' FRS

Top
#182614 - 02/16/06 10:49 PM Re: 2.5 vs one of my custom 3 inch exhaust (dyno graphs)
SamuraiSam Offline
Post Master Sr


Registered: 07/29/02
Posts: 8826
Loc: Bellingham, WA
Things don't work quite the same with superchargers.... freeing up backpressure doesn't have the same benefits as on an app. where you're pushing a turbine.
Top
#182615 - 02/17/06 01:15 AM Re: 2.5 vs one of my custom 3 inch exhaust (dyno graphs)
SiR Steel Offline
Post Master Sr


Registered: 06/18/01
Posts: 8050
Loc: West Vancouver, BC, Canada
Thanks for the advice, guys. I'll stick with what I have.
_________________________
2015 BMW 335i xDrive M Performance Edition
1977 British Leyland MINI Modded 1380cc LHD
2005 Piaggio Vespa ET2 Modded 70cc

Top
#182616 - 02/17/06 01:20 AM Re: 2.5 vs one of my custom 3 inch exhaust (dyno graphs)
HCivic02 Offline
Post Master Supreme


Registered: 03/25/03
Posts: 12496
Loc: CA
Quote:

Thanks for the advice, guys. I'll stick with what I have.




if you have a stock exhaust step up to a 2.5"
_________________________
Chris
06' Evo IX - E85@29psi
13' FRS

Top
#182617 - 02/17/06 06:29 AM Re: 2.5 vs one of my custom 3 inch exhaust (dyno graphs)
OLDNAME Offline
Post Master Sr


Registered: 12/13/99
Posts: 5436
nice..shit over 70whp. but is that due to higher boost level.
man I wish I can bare the noise of the 3' dp though. arrrh.
_________________________
One of the last Si w/ BPU

Top
#182618 - 02/17/06 07:28 AM Re: 2.5 vs one of my custom 3 inch exhaust (dyno graphs)
Turbo-charged Offline
Post Master


Registered: 07/02/02
Posts: 2386
no the boost level is exactly the same, 15psi on those 2 runs.

with the smaller exhaust i had a "low boost" and "high boost" settings, with the wastegate placement i was unable to go below 15psi this time.

i took the old 15psi chart and over lapped the new 15psi chart, so no change it boost.

the same 2.5 inch downpipe was used for both runs you see as well.


Edited by Turbo-charged (02/17/06 07:28 AM)
_________________________
http://www.tempestracing.net
95 civic coupe 9.51@160

Top
#182619 - 02/17/06 08:28 AM Re: 2.5 vs one of my custom 3 inch exhaust (dyno graphs)
SiAdam Moderator Offline
Post Master Supreme


Registered: 07/22/01
Posts: 18810
Loc: West By God Virginia
Quote:

nice..shit over 70whp. but is that due to higher boost level.
man I wish I can bare the noise of the 3' dp though. arrrh.




I am running a 3" and it isn't loud @ all...

3" d/p into a flex, into a resontator and muffler...

Sounds good...

Outside sounds solid, not raspy, inside there isn't any droning..

Actually surprised it sounds as good as it does...

_________________________
05 Berlina Black S2000 700whp / 500wtq

Top
#182620 - 02/17/06 08:35 AM Re: 2.5 vs one of my custom 3 inch exhaust (dyno graphs)
OLDNAME Offline
Post Master Sr


Registered: 12/13/99
Posts: 5436
Good stuff TC. Man if I had the time I just go straight 3' from DP-ext. But I did that back in 2001yr. Besides the boost spike ranging from 3-5psi and man...it was just too damn loud. I used to work club security and would come home pretty late 4-5am. and my neighbors always bitch that they could hear my car.
so its been 2.5-3' evott for me. the sound is like stock. cant complain.
_________________________
One of the last Si w/ BPU

Top
#182621 - 02/17/06 09:09 AM Re: 2.5 vs one of my custom 3 inch exhaust (dyno graphs)
Buzzbomb Offline
Sr Member


Registered: 11/02/01
Posts: 1196
Loc: Bryan, Ohio, USA
What about low boost applications like 5-8 psi? Due to budget reasons, I'm going to run the sucky Greddy downpipe and a 60MM (2 3/8") exhaust. I want to upgrade the downpipe to a 2.5 in the future, but not sure about the exhaust.
_________________________
Authorized AMSOIL Dealer

00' Si Turbo
02' WRX Wagon XPT Stage2
13' Tribeca 3.6R Limited

Top
#182622 - 02/17/06 10:43 AM Re: 2.5 vs one of my custom 3 inch exhaust (dyno graphs)
SiAdam Moderator Offline
Post Master Supreme


Registered: 07/22/01
Posts: 18810
Loc: West By God Virginia
Quote:

What about low boost applications like 5-8 psi? Due to budget reasons, I'm going to run the sucky Greddy downpipe and a 60MM (2 3/8") exhaust. I want to upgrade the downpipe to a 2.5 in the future, but not sure about the exhaust.





You could run a 1/2" exhuast...would it work yea...how effective would it be is the question...

_________________________
05 Berlina Black S2000 700whp / 500wtq

Top
#182623 - 02/17/06 12:54 PM Re: 2.5 vs one of my custom 3 inch exhaust (dyno graphs)
Buzzbomb Offline
Sr Member


Registered: 11/02/01
Posts: 1196
Loc: Bryan, Ohio, USA
I don't know about that. A half inch might stall the car.

I would love to see a comparison test on a car runing 7psi.
_________________________
Authorized AMSOIL Dealer

00' Si Turbo
02' WRX Wagon XPT Stage2
13' Tribeca 3.6R Limited

Top
#182624 - 02/17/06 12:55 PM Re: 2.5 vs one of my custom 3 inch exhaust (dyno graphs)
baellremoteuse Offline
Member


Registered: 10/07/05
Posts: 840
Loc: Michigan :)
You like it when other people waste their time for your satisfaction, huh.
_________________________
Be lamps unto yourselves. If you can not read do not post. Lead by example *67, not with threats.

Top
#182625 - 02/17/06 01:47 PM Re: 2.5 vs one of my custom 3 inch exhaust (dyno graphs)
TypeSlow Offline
Post Master Jr


Registered: 01/14/02
Posts: 1646
Loc: Port Charlotte, FL
good stuff TC. how about anything on 3" exhaust and 3.5" or 4" e-cutout?
_________________________
TakE iT tO thE tRacK!!! 2000 Si ~~~ UNDER CONSTRUCTION ~~~ Coming Soon: GT3586 and a buttload of other goodies!!

Top
#182626 - 02/17/06 02:43 PM Re: 2.5 vs one of my custom 3 inch exhaust (dyno graphs)
Buzzbomb Offline
Sr Member


Registered: 11/02/01
Posts: 1196
Loc: Bryan, Ohio, USA
Quote:

You like it when other people waste their time for your satisfaction, huh.




And what is that suppose to mean?
_________________________
Authorized AMSOIL Dealer

00' Si Turbo
02' WRX Wagon XPT Stage2
13' Tribeca 3.6R Limited

Top
#182627 - 02/17/06 03:26 PM Re: 2.5 vs one of my custom 3 inch exhaust (dyno graphs)
SiAdam Moderator Offline
Post Master Supreme


Registered: 07/22/01
Posts: 18810
Loc: West By God Virginia
Quote:

good stuff TC. how about anything on 3" exhaust and 3.5" or 4" e-cutout?




I have a 3" and installed a cutout, I gained some more tq but not a huge improvement on hp?

Just my experience though...

_________________________
05 Berlina Black S2000 700whp / 500wtq

Top
#182628 - 02/17/06 06:20 PM Re: 2.5 vs one of my custom 3 inch exhaust (dyno graphs)
ChewiSi Offline
Post Master Sr


Registered: 11/15/03
Posts: 8117
Loc: Colorah rah
My 3 inch just drones like crazy from teh inside when I am anything over 17% throttle. but I can live with it. Might have to add a resonator here sometime.
_________________________

Top
#182629 - 02/17/06 09:15 PM Re: 2.5 vs one of my custom 3 inch exhaust (dyno graphs)
vspecsir Offline
Poster


Registered: 03/25/03
Posts: 266
Loc: 808 State
Quote:

Good stuff TC. Man if I had the time I just go straight 3' from DP-ext. But I did that back in 2001yr. Besides the boost spike ranging from 3-5psi and man...it was just too damn loud. I used to work club security and would come home pretty late 4-5am. and my neighbors always bitch that they could hear my car.
so its been 2.5-3' evott for me. the sound is like stock. cant complain.




whaa? where did you get the EVO TT from, i've been looking for it but nobody has it yet, as if it's not yet out for the EM1
_________________________
00' Civic Si L'dat

Top
#182630 - 02/18/06 01:30 AM Re: 2.5 vs one of my custom 3 inch exhaust (dyno graphs)
SiAdam Moderator Offline
Post Master Supreme


Registered: 07/22/01
Posts: 18810
Loc: West By God Virginia
Quote:

My 3 inch just drones like crazy from teh inside when I am anything over 17% throttle. but I can live with it. Might have to add a resonator here sometime.




I bought my resonator from summit...

Cheap, works like a charm...

Follow the link in my sig for a few links to some vids where you can hear the exhaust note, inside and out...

_________________________
05 Berlina Black S2000 700whp / 500wtq

Top
#182631 - 02/18/06 05:14 AM Re: 2.5 vs one of my custom 3 inch exhaust (dyno graphs)
SamuraiSam Offline
Post Master Sr


Registered: 07/29/02
Posts: 8826
Loc: Bellingham, WA
any coupe/sedan 96-00 civic can use the same exhaust IIRC.

Resonator would be a great addition.

Top
#182632 - 02/18/06 02:00 PM Re: 2.5 vs one of my custom 3 inch exhaust (dyno graphs)
SiRocket Offline
Post Master Sr


Registered: 03/05/00
Posts: 4792
Loc: [ downtown los angeles. ]
my 3inch on my vortech was horrid, but thats because it sounded like a damn all motor car as it is in between the mix... lol... can't wait to have my 3inch d/p going into that exhaust now
_________________________
Ricky..
- 2000 Civic Si (ebp) Laskey, Benson, Full-Race, Jb Weld, gt3582r powered | 628whp - 370wtq
- 2005 Scion Xb (blue.o.p) w/ 121,000+ miles | turbo sleeper in progress
- 1987 Dodge Conquest Tsi w/ 65,000 miles | 1.0bar on an 18g
RIP Earl Laskey
djRICKY.jay

Top
#182633 - 03/20/06 08:49 PM back from the dead.
vspecsir Offline
Poster


Registered: 03/25/03
Posts: 266
Loc: 808 State
Well I finally upgraded my exhaust. Prior to this upgrade, I was using a Greddy SP, the baffle in the muffler is blown, and I have a blown cat too. I ended up buying a 3" Kteller exahust, 3" test pipe, 18" resonator, and The 5x8 magnaflow muffler from kteller, bolted up to a spoolin performance 3" downpipe... This thing is F'ING LOUD!!!!! I dont know how your guys can drive with the Kteller setup, the interior is louder then the exterior. Low rpm cruising @ 2500-3500rpm is just drowing! the power increase is insane though, a much more noticable difference and I"m only running 6psi on a greddy kit. I need to come up with a solution, or I'm selling this thing too loud! This is my daily driver so it's irritating.

here's a vid (cold start & idle)

http://videos.streetfire.net/video/FB7316E7-E86A-41FF-8343-7969FA24F56A.htm


Edited by vspecsir (03/20/06 09:59 PM)
_________________________
00' Civic Si L'dat

Top
#182634 - 03/20/06 09:11 PM Re: back from the dead.
caRRRR Offline
Post Master Jr


Registered: 02/21/06
Posts: 1762
Loc: P.C. > U
which is your vid? a bunch of other vids came up... and what's with the girl fingerin herself in the middle of car vids? LOL
_________________________
00 FBP Si ~~ GT3582RLE 56/84

Top
#182635 - 03/20/06 09:16 PM Re: back from the dead.
ChewiSi Offline
Post Master Sr


Registered: 11/15/03
Posts: 8117
Loc: Colorah rah
LMAO. ha ha fucking hilarious that theres a vid of a girl fringering herself. but your exhaust is pretty loud. i bet mines louder, i don't have any resonators.
_________________________

Top
#182636 - 03/20/06 09:27 PM Re: back from the dead.
caRRRR Offline
Post Master Jr


Registered: 02/21/06
Posts: 1762
Loc: P.C. > U
i didn't find it...
_________________________
00 FBP Si ~~ GT3582RLE 56/84

Top
#182637 - 03/20/06 10:00 PM Re: back from the dead.
vspecsir Offline
Poster


Registered: 03/25/03
Posts: 266
Loc: 808 State
chewbaccasi, didn't you get a vibrant 3"? I think you posted a vid of it before but I dont remember. no resonator, sheesh... your crazy. maybe it's because I'm used to Greddy exhaust systems
_________________________
00' Civic Si L'dat

Top
#182638 - 03/20/06 10:05 PM Re: back from the dead.
caRRRR Offline
Post Master Jr


Registered: 02/21/06
Posts: 1762
Loc: P.C. > U
sounds like a V6 with flowmaster or something. you should get a vid of it revvin up a little.
_________________________
00 FBP Si ~~ GT3582RLE 56/84

Top
#182639 - 03/20/06 11:19 PM Re: back from the dead.
2000Sivortech Offline
Jr Member


Registered: 09/15/05
Posts: 378
Loc: orlando,florida usa
thermal 3" is super quiet even with no resonators or cat
Top
#182640 - 03/21/06 12:01 AM Re: back from the dead.
ChewiSi Offline
Post Master Sr


Registered: 11/15/03
Posts: 8117
Loc: Colorah rah
heres the link again, its not as loud from the outside as it is on the inside. Drones on the inside.

revving
http://media.putfile.com/DSCF288337

brake boosting= hell on clutch?
http://media.putfile.com/rollin263

Quote:

thermal 3" is super quiet even with no resonators or cat



i think its the muffler on the thermal exhaust that quiets them down.
_________________________

Top
Page 1 of 1 1


Moderator:  SiAdam 
Hop to:
Shout Box

CSi Sponsors

DallasColo
Dallas Colocation
Brake Kits
StopTech.Sale BBK Clearance
Brake Kits
Brake Kits Cheap
EBC Brake Kits
EBC Brakes
BuyBrakes
Brake Kits-Pads & Rotors Sets
Cruchfield
Audio/Video/Cameras
DeadWood Knives
Knives, Home & Hunting
Samys Camera
GoPros, Cameras, Gear
TireRack
Tires/Wheels/Suspension
Truck Accessories
Tonneaus, Running Boards
1-800-Flowers
Flowers & Gift Baskets
WeatherTech
Coupon Code "take10"
Porsche Brakes
Porsche Brake Upgrades
Artisan Soap Lab
Handcrafted Bodycare
Advertisement

| Brake Kits Cheap | EBC Brake Pads & Rotors | Performance Brake Kits | Porsche Brake Upgrades-Big Brake Kits | WeatherTech Mats -Coupon Code weathertech10