Honda and Acura Model Specific Forums

kornkid21792 · 07-11-2009, 08:11 AM

i have a 92 prelude i was wondering if i put a straight pipe on the exhaust would that increase performance a little

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NirVTEC · 07-11-2009, 08:59 AM

It would increase the noise a lot........and be obnoxious as HELL!!!

Kronn 98SH · 07-11-2009, 09:43 AM

It does increase performance, by 0.249179817234987whp

NirVTEC · 07-11-2009, 10:25 AM

Quote:

Originally Posted by Kronn 98SH

It does increase performance, by 0.249179817234987whp

We'll see tomorrow....I am doing an OPEN vs CLOSED dyno with my car....

TweakIntheCO · 07-11-2009, 11:05 AM

So... you're doing a straight pipe vs CAT, etc?

NirVTEC · 07-11-2009, 11:50 AM

Quote:

Originally Posted by TweakIntheCO

So... you're doing a straight pipe vs CAT, etc?

Open header(via "Y" pipe@header flange) VS 2.5" into Vibrant 2.5" muffler
197.5whp/165tq last time on a Dyno Dynamics Dynamometer with closed exhaust running rich as hell from 6000-8000....The OPEN header should lean it out a little bit....
Going to do a baseline 1st, and then open the "Y"
I will post results....

Kronn 98SH · 07-11-2009, 11:57 AM

Obviously open-header isn't the same as cat vs no cat. But it will definitely be nice to see the results. Which header do you have?

NirVTEC · 07-11-2009, 12:07 PM

Quote:

Originally Posted by Kronn 98SH

Obviously open-header isn't the same as cat vs no cat. But it will definitely be nice to see the results. Which header do you have?

Vibrant
Agreed......Cats are for Chinese food!

These will be Dyno Dynamics #'s so the 1st person that compares them to 190whp dynojet #'s will have a booger flicked at them.......
H22A4 intake+60mm exhaust+Vibrant header was 178whp tuned
H22A-R intake+60mm exhaust+stock header was 178whp tuned as well(previously made 196whp@KING MotorSports)

mugen88crx · 07-11-2009, 12:15 PM

Im confused are you talking about a straight pipe all the way back or a cat-delete? I have a test pipe on mine with a Apexi WSII and it has great pick up and sound.

NirVTEC · 07-11-2009, 01:01 PM

Quote:

Originally Posted by mugen88crx

Im confused are you talking about a straight pipe all the way back or a cat-delete?.

Not sure what the OP is talking about......when I hear Str8 Pipe, I think pipe off the header all the way back with no muffler/cat/resonator

Quote:

Originally Posted by mugen88crx

I have a test pipe on mine with a Apexi WSII and it has great pick up and sound.

Butt Dyno FTL.....you can't feel ~2whp.......
Sound=Bees stuck in a coffee can on decellerate

ALLxMOTOR EG · 07-11-2009, 01:10 PM

Quote:

Originally Posted by NirVTEC

It would increase the noise a lot........and be obnoxious as HELL!!!

NirVTEC · 07-11-2009, 02:40 PM

I will try to get a sound clip of my car on the dyno......
Granted I rev ~1000rpm higher than a stock H22, but you will get the idea!!
STUPID LOUD!!! And raspy as hell....

kornkid21792 · 07-12-2009, 10:25 AM

im meaning a like a cat delete sorry

iheartmybb6 · 07-12-2009, 06:44 PM

holy shit kronn...your everywhere man!!!!!

Kronn 98SH · 07-12-2009, 10:13 PM

Quote:

Originally Posted by iheartmybb6

holy shit kronn...your everywhere man!!!!!

Just H-T, PP, PO, and PA.

Edul59 · 07-12-2009, 10:52 PM

i have no cat..and well im debating to go back to cat...the sounds between 2500 and 3500 rpms are whack other than that it sounds good...

iheartmybb6 · 07-12-2009, 11:49 PM

Quote:

Originally Posted by Kronn 98SH

Just H-T, PP, PO, and PA.

ahhhhh gotcha

NirVTEC · 07-13-2009, 05:34 AM

Dyno results from OPEN vs CLOSED aren't even worth posting. Because of the use of the "Y" pipe, exhaust velocity still pushes its way through my exhaust system......~5whp at VTEC and that was it!
Bottom line: Str8 Pipe NOT WORTH IT!!!
But, you decide!

mugen88crx · 07-13-2009, 09:53 AM

Quote:

Originally Posted by NirVTEC

Not sure what the OP is talking about......when I hear Str8 Pipe, I think pipe off the header all the way back with no muffler/cat/resonator

Butt Dyno FTL.....you can't feel ~2whp.......
Sound=Bees stuck in a coffee can on decellerate

uh NO not really? I had a problem with the sound a while back, it would pop on decel but I found it was an exhaust leak. No bumble bee sound at all. And I'm not claiming and HP gain, it just feels more responsive, didn't say faster. WOW and meaning more responsive with the full exhaust setup, not just throwing a "test pipe" on it. I did this all at one time.

NirVTEC · 07-13-2009, 09:57 AM

A test pipe on my brand new Greddy Sp2 yielded bees in coffee can sound......

mugen88crx · 07-13-2009, 10:07 AM

the only problem i had was one of my flanges kept coming loose and would make a raspy sound during decel and sometime during or around 3k accel. other than that, ive had quite a few people complement me on the sound of my exhaust and they tend to be suprised when i tell them i have a test pipe on it.

i totally understand your reference to a butt dyno, i have NEVER nor will i ever claim any amount of HP simply by guessing. to be straight forward i have never even had my car dynoed. i get where your coming from though, a lot of people make claims of power simply by getting in their cars. i simply meant i felt a difference in throttle response (with all three - header, test pipe & exhaust), what just the test pipe did, who knows.

95greenlude · 07-13-2009, 11:17 AM

With cat
http://videos.streetfire.net/video/WS2Prelude_24176.htm

Without cat

Edul59 · 07-14-2009, 02:27 AM

5 whp?? ummm what headers do you have..i have the same exhaust as you but yours sounds better less raspy than mine

russlan44 · 07-14-2009, 09:00 AM

yuk exactly what i have, im too lazy to change it

Quote:

Originally Posted by 95greenlude

With cat
http://videos.streetfire.net/video/WS2Prelude_24176.htm

Without cat

NirVTEC · 07-14-2009, 10:26 AM

Quote:

Originally Posted by Edul59

5 whp?? ummm what headers do you have..i have the same exhaust as you but yours sounds better less raspy than mine

Vibrant header.....and you have to keep in mind that a lot of the exhaust was still passing through the muffler because of my "Y" design.....So that wasn't a TRUE OPEN HEADER.
5whp@VTEC X-over....thats it.....Nothing beyond ~5500 or so.....and no way near worth driving like that. By 6000rpm my ears would bleed.....And also keep in mind, I wind my motor out to ~8300rpm+ because of my JUN HEAD.

07-11-2009, 08:59 AM	#2
NirVTEC Member Join Date: Mar 2002 Location: NW Side Chicago, IL Posts: 4,215	Re: straight pipe It would increase the noise a lot........and be obnoxious as HELL!!! __________________ 1993 Prelude with some mods 1994 Prelude pushing 1/4 Million miles 1999 Integra GS-R---Slowly falling in love, sans B series!

07-11-2009, 09:43 AM	#3
Kronn 98SH Member Join Date: Dec 2004 Location: Oklahoma City, OK, USA Posts: 2,015	Re: straight pipe It does increase performance, by 0.249179817234987whp __________________ 1998 Prelude SH - bolt-ons dynoing @ 173whp&140tq \| 2006 CRF150F - acquired 6/20/09 Small 5th Gen Part-Out, SH & Base, OEM & Aftermarket

07-11-2009, 11:05 AM	#5
TweakIntheCO Junior Member Join Date: Nov 2007 Location: Evergreen, CO Posts: 69	Re: straight pipe So... you're doing a straight pipe vs CAT, etc? __________________ My car runs on leprechauns

07-11-2009, 11:57 AM	#7
Kronn 98SH Member Join Date: Dec 2004 Location: Oklahoma City, OK, USA Posts: 2,015	Re: straight pipe Obviously open-header isn't the same as cat vs no cat. But it will definitely be nice to see the results. Which header do you have? __________________ 1998 Prelude SH - bolt-ons dynoing @ 173whp&140tq \| 2006 CRF150F - acquired 6/20/09 Small 5th Gen Part-Out, SH & Base, OEM & Aftermarket

07-11-2009, 12:15 PM	#9
mugen88crx Junior Member 1994 Honda Prelude Join Date: Aug 2004 Location: Jacksonville, FL, USA Posts: 146	Re: straight pipe Im confused are you talking about a straight pipe all the way back or a cat-delete? I have a test pipe on mine with a Apexi WSII and it has great pick up and sound. __________________ '94 Prelude - AEM Short Ram - KYB AGX Shocks - RS*R Down Springs - F&R Strut Bars - Rear Tie Bar - ST Sway Bars - APEXi WS2 - Greddy Header - Fidanza Flywheel - VIS CF Hood - JDM Black Headlights - JDM Fender Markers - JDM Fogs - APEXi V-AFCII - JDM H22A

07-11-2009, 02:40 PM	#12
NirVTEC Member Join Date: Mar 2002 Location: NW Side Chicago, IL Posts: 4,215	Re: straight pipe I will try to get a sound clip of my car on the dyno...... Granted I rev ~1000rpm higher than a stock H22, but you will get the idea!! STUPID LOUD!!! And raspy as hell.... __________________ 1993 Prelude with some mods 1994 Prelude pushing 1/4 Million miles 1999 Integra GS-R---Slowly falling in love, sans B series!

07-12-2009, 10:25 AM	#13
kornkid21792 Junior Member Join Date: Apr 2009 Posts: 326	Re: straight pipe im meaning a like a cat delete sorry

07-12-2009, 06:44 PM	#14
iheartmybb6 Junior Member Join Date: Sep 2008 Location: Nashville, TN, USA Posts: 12	Re: straight pipe holy shit kronn...your everywhere man!!!!!

07-12-2009, 10:52 PM	#16
Edul59 Junior Member Join Date: Dec 2006 Location: 909, 562 Posts: 150	Re: straight pipe i have no cat..and well im debating to go back to cat...the sounds between 2500 and 3500 rpms are whack other than that it sounds good... __________________ 95' BB1

07-13-2009, 05:34 AM	#18
NirVTEC Member Join Date: Mar 2002 Location: NW Side Chicago, IL Posts: 4,215	Re: straight pipe Dyno results from OPEN vs CLOSED aren't even worth posting. Because of the use of the "Y" pipe, exhaust velocity still pushes its way through my exhaust system......~5whp at VTEC and that was it! Bottom line: Str8 Pipe NOT WORTH IT!!! But, you decide! __________________ 1993 Prelude with some mods 1994 Prelude pushing 1/4 Million miles 1999 Integra GS-R---Slowly falling in love, sans B series!

07-13-2009, 09:57 AM	#20
NirVTEC Member Join Date: Mar 2002 Location: NW Side Chicago, IL Posts: 4,215	Re: straight pipe A test pipe on my brand new Greddy Sp2 yielded bees in coffee can sound...... __________________ 1993 Prelude with some mods 1994 Prelude pushing 1/4 Million miles 1999 Integra GS-R---Slowly falling in love, sans B series!

07-13-2009, 10:07 AM	#21
mugen88crx Junior Member 1994 Honda Prelude Join Date: Aug 2004 Location: Jacksonville, FL, USA Posts: 146	Re: straight pipe the only problem i had was one of my flanges kept coming loose and would make a raspy sound during decel and sometime during or around 3k accel. other than that, ive had quite a few people complement me on the sound of my exhaust and they tend to be suprised when i tell them i have a test pipe on it. i totally understand your reference to a butt dyno, i have NEVER nor will i ever claim any amount of HP simply by guessing. to be straight forward i have never even had my car dynoed. i get where your coming from though, a lot of people make claims of power simply by getting in their cars. i simply meant i felt a difference in throttle response (with all three - header, test pipe & exhaust), what just the test pipe did, who knows. __________________ '94 Prelude - AEM Short Ram - KYB AGX Shocks - RS*R Down Springs - F&R Strut Bars - Rear Tie Bar - ST Sway Bars - APEXi WS2 - Greddy Header - Fidanza Flywheel - VIS CF Hood - JDM Black Headlights - JDM Fender Markers - JDM Fogs - APEXi V-AFCII - JDM H22A

07-13-2009, 11:17 AM	#22
95greenlude Member Join Date: Dec 2004 Location: Las Vegas, NV Posts: 3,059	Re: straight pipe With cat http://videos.streetfire.net/video/WS2Prelude_24176.htm Without cat __________________ Jared -'95 Prelude SE - 13.7 @ 102 Now Rockin G23 Non-VTEC Check out my blog My Flickr Nikon D50

07-14-2009, 02:27 AM	#23
Edul59 Junior Member Join Date: Dec 2006 Location: 909, 562 Posts: 150	Re: straight pipe 5 whp?? ummm what headers do you have..i have the same exhaust as you but yours sounds better less raspy than mine __________________ 95' BB1

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