Honda and Acura Model Specific Forums

rotascircuit · 11-07-2009, 01:21 PM

Hey I got a 95 gsr in my hatch.Its stock with just bolt ons. What exhaust size should I get?? 2"...or 2.25"... or 2.5".... or 3"..??

my buddy said I can run a 3" with a good tune and not lose power. WHo's right???

thanks guys

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speedooo · 11-07-2009, 01:27 PM

3" is overkill...2.25 or 2.5 is fine

mrdeadman · 11-07-2009, 01:38 PM

60mm is good. Anything bigger is too big.
http://www.team-integra.net/sections...p?ArticleID=48

my_gsr_teg · 11-07-2009, 07:34 PM

3 is too big for basic bolt on. u probably lose hp. and btw are you talking from the axle back or the cat-back?

josh-roy · 11-07-2009, 08:01 PM

3'' is too big for bolt ons for sure... Its like when you use a bigger intake manifold (Venom) on a stock car, too much air flow.. it just chokes on it and there in lies power loss.

Just go 2.5.

-PaulMc- · 11-07-2009, 08:05 PM

Quote:

Originally Posted by speedooo

3" is overkill...2.25 or 2.5 is fine

Don't you have a five inch on your car speedy??

speedooo · 11-07-2009, 11:21 PM

yeah but it was completely necessary for my na sohc.

DC2many · 11-08-2009, 01:52 AM

2.25-2.5, and the Ti articles should giv you a good idea as well.

most catbacks are 2.36-2.38 and 2.36 being the most common

if you are doing customthen you'd should do 2.25 or 2.5 mandrel bending.

3" crush bent is supposedly equivlent to a 2.5 mandrel but it still is going from 3 > 2.5 on the bends and back to 3... not even flow

joker_x · 11-08-2009, 02:49 AM

2.5 with a test pipe ftw

Jtbelcher · 11-08-2009, 11:26 AM

2.5in/63mm is what the guys at KMS recommend for ITR motors idk about gsr

OH_1fstgsr · 11-08-2009, 12:56 PM

Here are some pictures of a custom 2.5" Exhaust.

SMSP Header to the SMSP High flow cat

Extra O2 bung, if I ever have to go back to OBD2

I took off a Comptech Cat-back. ~2.36"

If you are planning to stay with bolts-ons on your car you will never see the benifits of a 3". Keep in mind 3" will sound louder and weight more. If your planning major engine work, lets say over 225whp a 3" will be good.

rotascircuit · 11-11-2009, 12:17 PM

Quote:

Originally Posted by my_gsr_teg

3 is too big for basic bolt on. u probably lose hp. and btw are you talking from the axle back or the cat-back?

I'm talking about the cat back

rotascircuit · 11-11-2009, 12:19 PM

Quote:

Originally Posted by joker_x

2.5 with a test pipe ftw

test pipe you mean no cat just a pipe instead? we did the on my friends gsr with a 2.5 cat back and it seamed like we lost power .......idk

rotascircuit · 11-11-2009, 12:22 PM

Quote:

Originally Posted by OH_1fstgsr

Here are some pictures of a custom 2.5" Exhaust.
[

I took off a Comptech Cat-back. ~2.36"

.

hey btw what exhaust is that? I mean the axle back? es tunning?? cuz thats what I have

ninjaturtleEG · 11-11-2009, 12:28 PM

^^Just put a cat on my car for emmissions and it feels like there is more torque in lower rpm. But in higher rpms 3000+ definitely feel less power than before with a test pipe.

OH_1fstgsr · 11-11-2009, 02:03 PM

Quote:

Originally Posted by rotascircuit

hey btw what exhaust is that? I mean the axle back? es tunning?? cuz thats what I have

Vibrant
I'm pretty sure this is it.
http://vibrantperformance.com/catalo...oducts_id=1161

Rsx=jdm · 11-11-2009, 02:40 PM

Definitely do not run 2.50 or 3 inch unless you go turbo stick with 2.25.

94VTECoupe · 11-11-2009, 06:40 PM

I can't believe this thread. This is the stupidest thing ever, Exhaust does NOT increase your performance by any noticeable amount unless you've got a build and are required to put it on. You're just drawing attention to yourself. I would save your pennies and go for a more useful mod personally.

ALLMOTOR18 · 11-11-2009, 07:05 PM

60mm exhaust is good upto 220whp... just get a good aftermarket exhaust...

ALL M0T0R · 11-11-2009, 08:19 PM

If you wanna make power.. reguardless of what anyone tells you..

you have to run 2.5+.. I run 3'' on my daily and have even had thoughts of going 4''..

ALL M0T0R · 11-11-2009, 08:19 PM

Quote:

Originally Posted by Rsx=jdm

Definitely do not run 2.50 or 3 inch unless you go turbo stick with 2.25.

This guy obviously has no idea what an exhaust does.

rotascircuit · 11-11-2009, 11:21 PM

Quote:

Originally Posted by ALL M0T0R

If you wanna make power.. reguardless of what anyone tells you..

you have to run 2.5+.. I run 3'' on my daily and have even had thoughts of going 4''..

good luck bro with no back pressure I'll stick to 2.25

rotascircuit · 11-11-2009, 11:24 PM

Quote:

Originally Posted by 94VTECoupe

I can't believe this thread. This is the stupidest thing ever, Exhaust does NOT increase your performance by any noticeable amount unless you've got a build and are required to put it on. You're just drawing attention to yourself. I would save your pennies and go for a more useful mod personally.

yes I felt a difference.

when you take a crap in the bathroom, you want it all out in no time. thats somewhat same with a car

DC2many · 11-12-2009, 12:07 AM

^LMAO

but you also don't want 3"+ on NA poop tube

Slain · 11-12-2009, 04:21 AM

Quote:

Originally Posted by rotascircuit

good luck bro with no back pressure I'll stick to 2.25

All MOTOR knows his stuff he has a ton of dyno time to back up his claims as well.

On dynos I've never seen a loss of power going to a larger 3" exhaust tuned it was always significant gains.

11-07-2009, 01:27 PM	#2
speedooo Member 1994 Honda Civic My Garage Join Date: Mar 2005 Location: chillin on brighton ave sippin wawa peach iced tea in my eg Posts: 8,063	Re: will I lose power with a ------ exhaust size?? 3" is overkill...2.25 or 2.5 is fine

11-07-2009, 01:38 PM	#3
mrdeadman Member Join Date: Jun 2005 Posts: 2,853	Re: will I lose power with a ------ exhaust size?? 60mm is good. Anything bigger is too big. http://www.team-integra.net/sections...p?ArticleID=48 __________________ Automatic Integra Squad Member [009] Resident Capitalist and there was a firefight!

11-07-2009, 07:34 PM	#4
my_gsr_teg Junior Member Join Date: Apr 2008 Location: merced, ca, united states Posts: 78	Re: will I lose power with a ------ exhaust size?? 3 is too big for basic bolt on. u probably lose hp. and btw are you talking from the axle back or the cat-back?

11-07-2009, 08:01 PM	#5
josh-roy Junior Member Join Date: Mar 2009 Posts: 57	Re: will I lose power with a ------ exhaust size?? 3'' is too big for bolt ons for sure... Its like when you use a bigger intake manifold (Venom) on a stock car, too much air flow.. it just chokes on it and there in lies power loss. Just go 2.5. __________________ We cut the legs off of our pants...

11-07-2009, 11:21 PM	#7
speedooo Member 1994 Honda Civic My Garage Join Date: Mar 2005 Location: chillin on brighton ave sippin wawa peach iced tea in my eg Posts: 8,063	Re: will I lose power with a ------ exhaust size?? yeah but it was completely necessary for my na sohc.

11-08-2009, 01:52 AM	#8
DC2many Junior Member Join Date: Sep 2009 Posts: 32	Re: will I lose power with a ------ exhaust size?? 2.25-2.5, and the Ti articles should giv you a good idea as well. most catbacks are 2.36-2.38 and 2.36 being the most common if you are doing customthen you'd should do 2.25 or 2.5 mandrel bending. 3" crush bent is supposedly equivlent to a 2.5 mandrel but it still is going from 3 > 2.5 on the bends and back to 3... not even flow __________________ http://www.hondamarketplace.com/show....php?t=2667478 <- buy stuff!!1

11-08-2009, 02:49 AM	#9
joker_x Junior Member Join Date: Oct 2008 Location: san diego, ca Posts: 23	Re: will I lose power with a ------ exhaust size?? 2.5 with a test pipe ftw

11-08-2009, 11:26 AM	#10
Jtbelcher Junior Member Join Date: Oct 2009 Posts: 47	Re: will I lose power with a ------ exhaust size?? 2.5in/63mm is what the guys at KMS recommend for ITR motors idk about gsr

11-08-2009, 12:56 PM	#11
OH_1fstgsr Junior Member Join Date: Nov 2006 Location: Dublin, OH, USA Posts: 780	Re: will I lose power with a ------ exhaust size?? Here are some pictures of a custom 2.5" Exhaust. SMSP Header to the SMSP High flow cat Extra O2 bung, if I ever have to go back to OBD2 I took off a Comptech Cat-back. ~2.36" If you are planning to stay with bolts-ons on your car you will never see the benifits of a 3". Keep in mind 3" will sound louder and weight more. If your planning major engine work, lets say over 225whp a 3" will be good. __________________ "An Action without Philosophy is a Lethal Weapon, Philosophy without Action is a Worthless." - Soichiro Honda 1999 GSR 184whp/135tq highway 33.4mpg/1993 Del Sol Si 121whp/102tq highway 38.6mpg

11-11-2009, 12:28 PM	#15
ninjaturtleEG Junior Member Join Date: Aug 2009 Location: Seattle Posts: 90	Re: will I lose power with a ------ exhaust size?? ^^Just put a cat on my car for emmissions and it feels like there is more torque in lower rpm. But in higher rpms 3000+ definitely feel less power than before with a test pipe.

11-11-2009, 02:40 PM	#17
Rsx=jdm Junior Member Join Date: Feb 2007 Location: Repn 619 Posts: 106	Re: will I lose power with a ------ exhaust size?? Definitely do not run 2.50 or 3 inch unless you go turbo stick with 2.25.

11-11-2009, 06:40 PM	#18
94VTECoupe Junior Member Join Date: Jul 2007 Location: Lakewood, WA, United States Posts: 149	Re: will I lose power with a ------ exhaust size?? I can't believe this thread. This is the stupidest thing ever, Exhaust does NOT increase your performance by any noticeable amount unless you've got a build and are required to put it on. You're just drawing attention to yourself. I would save your pennies and go for a more useful mod personally.

11-11-2009, 07:05 PM	#19
ALLMOTOR18 Member Join Date: Feb 2002 Location: CA Posts: 3,876	Re: will I lose power with a ------ exhaust size?? 60mm exhaust is good upto 220whp... just get a good aftermarket exhaust... __________________ For Sale: http://www.honda-tech.com/zerothread?id=2417440 Street Stock Racecar For Sale: 1995 Acura Integra GSR.. PM for Info..

11-11-2009, 08:19 PM	#20
ALL M0T0R Junior Member 1997 Acura Integra Join Date: Aug 2009 Location: Baton Rouge,Louisiana Posts: 891	Re: will I lose power with a ------ exhaust size?? If you wanna make power.. reguardless of what anyone tells you.. you have to run 2.5+.. I run 3'' on my daily and have even had thoughts of going 4''.. __________________ [Formly Known as Integratype-R] www.9400rpms.com InnovativeMotorWorks \|DFE Enterprises \|Rocket MotorSports\|cccylinderheads.com eCtune PRO,NeptuneRTP, & CromePRO Tuner / Supporter - Rocket MotorSports Dealer

11-12-2009, 12:07 AM	#24
DC2many Junior Member Join Date: Sep 2009 Posts: 32	Re: will I lose power with a ------ exhaust size?? ^LMAO but you also don't want 3"+ on NA poop tube __________________ http://www.hondamarketplace.com/show....php?t=2667478 <- buy stuff!!1

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