Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com
 
Hines Performance (HPE)
Go Back   Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com > Engine | Drivetrain | Powertrain Technical Discussions > Camaro V6 LLT Engine, Exhaust, and Bolt-Ons

Camaro V6 LLT Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

Reply
 
Thread Tools
Old 03-03-2012, 11:05 PM   #1
bmorecam
Account Suspended
 
Drives: jealous vendors mad!! HAHA!!
Join Date: Jan 2011
Location: CYBERGMONSTER@GMAIL.COM
Posts: 3,660
For you guys with OBX long tube header

Anytime after installing your OBX header, do any of you notice any hissing noise slightly mixed with what sound like a hand shaker instrument being shaken while accelerating? It sound like hissing mixed with a bunch of hard rice being shaken in a can, almost like a rattle snake's tail. It can also go as sounding raspy. I been dealing with this noise for almost a year! and I still can't seem to find the reason why. I can't find any leaks either, and if I been dealing with almost a year worth of leak I'm sure I would be able to see at least a little bit of black soot shooting out but none. Some are saying it's because of the thin material the OBX is made from but if I'm the only one that's hearing this noise then it can't be that. So any of you other OBX guys going through this?

I also want to note that if you have a loud exhaust I'm sure you can't hear this. I have somewhat of a mild exhaust. Zero drone and very quiet when just cruising on the highway. The noise is not there when the windows are down but definitely noticeable when the windows are up and radio off.

Last edited by bmorecam; 03-03-2012 at 11:22 PM.
bmorecam is offline   Reply With Quote
Old 03-04-2012, 04:39 AM   #2
TheBlack-CyberGray-Pearl
 
TheBlack-CyberGray-Pearl's Avatar
 
Drives: 2011 Cyber Gray Camaro
Join Date: Mar 2012
Location: Salt Lake City, UT
Posts: 152
I know this won't be much help at all and you're going to want to wait for a better answer, but i've read on here that the steel on the OBX's pipes are not as thick as others, and that's a big reason why they produce some noise that is, in some opinions, not as desirable.
TheBlack-CyberGray-Pearl is offline   Reply With Quote
Old 03-04-2012, 05:38 AM   #3
rtcat600man
having FUN now 13.66@101
 
rtcat600man's Avatar
 
Drives: 2010 2LT IOM
Join Date: Nov 2009
Location: Clarkston, Michigan
Posts: 7,832
I have not heard anything like what you describe Jay. I have the MRT's and the X pipe and still have a some drone (now different than when I had just the MRT's), nothing that bothers me thou. I have no leaks. I will keep my ear out the next time I am driving to see if I hear anything. Does it happen at certain rpm's or speeds?
__________________
rtcat600man is offline   Reply With Quote
Old 03-04-2012, 10:21 AM   #4
bmorecam
Account Suspended
 
Drives: jealous vendors mad!! HAHA!!
Join Date: Jan 2011
Location: CYBERGMONSTER@GMAIL.COM
Posts: 3,660
Cat, the only time its audible is with the windows up and radio off. It usually happen whenever I drive with the gas on part throttle. The noise seem to be somewhat accompanied with the hiss. So basically drive normally with your windows up and radio off and you should hear it if its there.

graypearl, that's what a lot of peoples are saying and I hope that's the case. I hope that I'm not dealing with a hairpin leak that's going to be impossible to find without taking the header off because we all know its a real PITA dealing with headers on LLT.
bmorecam is offline   Reply With Quote
Old 03-04-2012, 11:31 AM   #5
bmorecam
Account Suspended
 
Drives: jealous vendors mad!! HAHA!!
Join Date: Jan 2011
Location: CYBERGMONSTER@GMAIL.COM
Posts: 3,660
Just came back from going to the store and the noise seem to be really audible around 2300rpm with about 35-40% throttle and only while driving. Just listen for the air hissing and once you notice the hiss, see if you can hear what sound like hard rice being shaken in a shaker or almost like the rattle snake's tail that's accompanied with the hiss at different rpm. There's more hiss than the shaker sound. You have to really pay attention in a quiet cabin or you might not be able to hear it. If is warm in your area you might not be able to hear it at all but it should hiss though.
bmorecam is offline   Reply With Quote
Old 03-04-2012, 11:32 AM   #6
TJ91
:chevy:
 
TJ91's Avatar
 
Drives: 2LT/RS
Join Date: Jun 2008
Location: Toronto
Posts: 12,493
It cant be a loose heat shield or something? I know longtubes all add rasp, wonder what this noise is your hearing. A hairpin leak will be beyond a PITA!
__________________
CAMARO
Consult your doctor before taking Camaro
Side effects include Sudden increase in Heart Rate, Insomnia and occasional hallucinations
If you experience Permagrin exceeding 4 hours after taking Camaro, seek immediate Camaro5 Help
CAMARO Bringing excitment back into the Garage
TJ91 is offline   Reply With Quote
Old 03-04-2012, 11:45 AM   #7
bmorecam
Account Suspended
 
Drives: jealous vendors mad!! HAHA!!
Join Date: Jan 2011
Location: CYBERGMONSTER@GMAIL.COM
Posts: 3,660
No, it's not the rasp that we all know about from long tube header and exhaust. It's a hiss that usually get accompanied with what sound like bunch of hard rice being shaken in a wooden shaker like one of those morrocan hand shaker instrument. When those two noise get mixed together it can almost go as slight rasp. All this noise is coming directly from the engine area more towards the passenger side. I been dealing with this noise for almost a year and it seem like it just got a little louder and it's starting to get very annoying because the noise is very unnatural that I know it should not be there. The car run like a champ though and no CEL. I'm certain that it's because of this header and something is telling me that I have a weld that's cracked from the inside probably around the collector area where all the pipes join together or a small hairpin leak that's probably impossible to find. I was not expecting to change out my headers this soon but it look like I will have to unless I just deal with the noise.
bmorecam is offline   Reply With Quote
Old 03-04-2012, 12:12 PM   #8
TJ91
:chevy:
 
TJ91's Avatar
 
Drives: 2LT/RS
Join Date: Jun 2008
Location: Toronto
Posts: 12,493
__________________
CAMARO
Consult your doctor before taking Camaro
Side effects include Sudden increase in Heart Rate, Insomnia and occasional hallucinations
If you experience Permagrin exceeding 4 hours after taking Camaro, seek immediate Camaro5 Help
CAMARO Bringing excitment back into the Garage
TJ91 is offline   Reply With Quote
Old 03-04-2012, 04:12 PM   #9
cntryman77

 
cntryman77's Avatar
 
Drives: 2010 Camaro LS
Join Date: Mar 2010
Location: Newton Falls, OH
Posts: 1,070
I've never noticed anything like this, but I'll try to take a listen the next few days
__________________
cntryman77 is offline   Reply With Quote
Old 03-04-2012, 04:44 PM   #10
HopeRidesAlone

 
HopeRidesAlone's Avatar
 
Drives: 2010 Camaro Black 2SS/RS
Join Date: Mar 2010
Location: Maryland
Posts: 832
I do have a hissing sound and a rattle. I know the problem with mine though. The hissing i do have a small leak still trying to fix and the rattle that ive found with mine is actaully the exahsut is hitting the heat shield. I belive the OBX header must sit a tad higher than the stock manifolds and under the torque my ark catback is tapping against the heat shield. Bmore one more thing to look at that i messed up the first time i put them on was which way the bolts face. I had to spin them because they were hitting the heat shield and you could see little indents in it from them tapping it. Just something you may want to look at.
__________________
2010 Black 2LT/RS - Injen CAI, ARK DTS Catback Polished Tips, OBX LT Headers, Lowered on Eibach, 3/8 blackiceolator, Trifecta Tuned.- Totaled 3/10/13

2010 Black 2SS/RS - Feesler side skirt, Feesler Spoiler, Feesler carbon fiber bowties, H&R Lowering Springs.
HopeRidesAlone is offline   Reply With Quote
Old 03-04-2012, 06:25 PM   #11
bmorecam
Account Suspended
 
Drives: jealous vendors mad!! HAHA!!
Join Date: Jan 2011
Location: CYBERGMONSTER@GMAIL.COM
Posts: 3,660
Thanks countryman.

Hope, are you sure you have a leak? Mine is not a rattle that's accompanied with the hiss. Its not the type of rattle as if a bolt or heat shield was lose. It's more like a rasp or static mixed with the hiss. I know for me its not the heat shield.

Its really not that loud but annoying enough to know its there. If you have a considerably loud exhaust you wont be able to hear it. If the window is down or even slightly cracked you can't hear it. Same if you have the radio on too.

I been doing lot's of Googling and what's crazy is that the peoples who seem to notice the same problem as me all have obx header or product. Everyone seem to have the hissing and in worst cases the same rattle snake and resonating sound accompanied with the hiss just like me. I been trying to figure this out for a long time and it doesn't look like im going to get anywhere again except for just taking it as being normal again or just take it as a loss and replace my header.

I guess I'll just keep looking for leaks and miraculously I can come up with an answer.
bmorecam is offline   Reply With Quote
Old 03-04-2012, 06:33 PM   #12
Agarc
Dr.Frankenstein
 
Agarc's Avatar
 
Drives: Frankenstein 6.0 LS2
Join Date: Jul 2011
Location: MIA
Posts: 1,533
dam it so this is a bad idea then to get ..
__________________
Agarc is offline   Reply With Quote
Old 03-04-2012, 06:52 PM   #13
HopeRidesAlone

 
HopeRidesAlone's Avatar
 
Drives: 2010 Camaro Black 2SS/RS
Join Date: Mar 2010
Location: Maryland
Posts: 832
yea i know the rattle in mine is very noticable but i do get a hiss that you can only hear when its quiet and i havent been able to fix that yet
__________________
2010 Black 2LT/RS - Injen CAI, ARK DTS Catback Polished Tips, OBX LT Headers, Lowered on Eibach, 3/8 blackiceolator, Trifecta Tuned.- Totaled 3/10/13

2010 Black 2SS/RS - Feesler side skirt, Feesler Spoiler, Feesler carbon fiber bowties, H&R Lowering Springs.
HopeRidesAlone is offline   Reply With Quote
Old 03-04-2012, 06:56 PM   #14
2010_camaro
 
2010_camaro's Avatar
 
Drives: 2014 Camaro SS
Join Date: May 2011
Location: Florence, KY
Posts: 614
I had one issue with my OBX's The resinators (cant spell) came lose inside and it made a sound like that. I took them off and rewelded them.
2010_camaro is offline   Reply With Quote
Old 03-04-2012, 07:46 PM   #15
Elykson
Custom One Off
 
Elykson's Avatar
 
Drives: 2010 Chicago Blackhawks Edition #1
Join Date: Oct 2010
Location: Madhouse on Madison
Posts: 1,169
Are these made in China?
__________________
Vararam Intake/SLP Loud Mouth II/BBK LT HFC/Magnaflow x-pipe/Pfadt Springs/Black Ice-olator/FE3 suspension/VMAX TB/RX catch can/Trifecta Tune
http://www.camaro5.com/forums/showthread.php?t=129416
Elykson is offline   Reply With Quote
Old 03-04-2012, 08:55 PM   #16
bmorecam
Account Suspended
 
Drives: jealous vendors mad!! HAHA!!
Join Date: Jan 2011
Location: CYBERGMONSTER@GMAIL.COM
Posts: 3,660
Quote:
Originally Posted by 2010_camaro View Post
I had one issue with my OBX's The resinators (cant spell) came lose inside and it made a sound like that. I took them off and rewelded them.
You mean the cores(on the pic) came off the weld inside the resonator?

I know I have a leak right on that same resonator connection that will not go away no matter what I do, but I'm not sure if the noise I am describing could be associated with that leak. I know I heard plenty of exhaust leaks before and it doesn't sound nothing like what I am experiencing.
Attached Images
 
bmorecam is offline   Reply With Quote
Old 03-05-2012, 12:15 AM   #17
Synergy1911
 
Synergy1911's Avatar
 
Drives: 2011 1LT RS - Red Jewel
Join Date: Feb 2011
Location: Sacramento & LA
Posts: 93
Quote:
Originally Posted by Elykson View Post
Are these made in China?
I believe so, hence the complaints about the "rusting" stainless. Chinese Stainless...

Quote:
Originally Posted by OBX.com
COMMITTED TO INVESTMENT WORLDWIDE OBX is committed to be on the cutting edge of technology by investing in research and development; new mould development and innovative designs with CAD/CAM centers worldwide.

STATE OF THE ART DESIGN & TECHNOLOGY OBX Organization, along with global partners and affiliates are capable of manufacturing products such as: Stainless steel rolling, stamping; aluminum die casting, extrusion, CNC, center machining, mould cutting forging; fiberglass moulds, plastic injections, JIG designs, 3D mandrel bending, and CAD/CAM designing.
http://www.obxracingsports.com/about_us.php

If made in the USA, most mfg's know that it is a selling point and advertise as Made in the USA.
Synergy1911 is offline   Reply With Quote
Old 03-05-2012, 12:22 AM   #18
2010_camaro
 
2010_camaro's Avatar
 
Drives: 2014 Camaro SS
Join Date: May 2011
Location: Florence, KY
Posts: 614
yes the weld breaks. and yes they are made in China lol but im fine with china when it saved me 500 bucks lol
2010_camaro is offline   Reply With Quote
Old 03-05-2012, 12:37 AM   #19
Grimlock
dey see me rollin
 
Grimlock's Avatar
 
Drives: the magic school bus
Join Date: Feb 2011
Location: Vault 101
Posts: 819
Bmore and Hope - Both are you are MDers. How do you get around emissions? I ask because I'm on edge on buying some longtubes and the ones with hiflow are loads more than OBX.
__________________
Have you ever been tickled on the inside? - Elmo
Grimlock is offline   Reply With Quote
Old 03-05-2012, 01:32 AM   #20
Synergy1911
 
Synergy1911's Avatar
 
Drives: 2011 1LT RS - Red Jewel
Join Date: Feb 2011
Location: Sacramento & LA
Posts: 93
Quote:
Originally Posted by 2010_camaro View Post
yes the weld breaks. and yes they are made in China lol but im fine with china when it saved me 500 bucks lol
You are fine with a cheap product that breaks? I personally would spend a little more on a American made product with a good warranty. For example Doug Thorley has lifetime warranty on all their headers and ceramic coatings.

As for the OBX steel I have been trying to find out about SUS 304, seems that SUS is an Asian grading, anything with SUS that I found comes from China. 304 can also be called 18/8 stainless. The Gateway Arch is made of 304 stainless steel. So proper SS should not rust such as the OBX headers. 300 series steel is also non magnetic. 400 series is magnetic.

Just found this:

Why 409 type Stainless Steel pipes and shells?
-409 type Stainless Steel is specially designed for automotive exhaust systems.
-409 type Stainless Steel resists atmospheric and automotive exhaust gas corrosion.
-409 type Stainless Steel developes a light surface discoloring which will retard progressive corrosion.
-409 type Stainless Steel contains 10.5%...11.75% Chromium

Why 304(14G) type Stainless Steel tips, flanges, internals and brackets?
-304 type Stainless Steel contains 18%...20% Chromium and 8%...10.5% Nickel.
-304 type Stainless Steel has excellent heat, oxidation and corrosion resistance.
-304 type Stainless Steel Looks great and will shine for ever!

How to clean Stainless Steel .
-409 type Stainless Steel can be cleaned with non metallic pot scrub pads and soap, ammonia, liquid or powder detergent.
-304 type Stainless Steel can be cleaned with non metallic non abrasive cleaning pads or brushes with soap or liquid detergent, use "Chrome polish" if necessary.
-Do not clean with Steel Wool or a Steel Brush ---> surface rust will result.
*************
The most common stainless steel used by muffler shop is the T-409.
Borla uses T-304 stainless steel grade. It's why the price is so different. A Borla looks great and will shine for ever!
T-409 is good for peoples who live where there are no calcium or where the corrosion is not a problem.
T-304 is for north american and canadian peoples who want to keep their cars for more than 3 years in a corrosive environment"

Last edited by Synergy1911; 03-05-2012 at 01:44 AM.
Synergy1911 is offline   Reply With Quote
Old 03-05-2012, 09:40 AM   #21
bmorecam
Account Suspended
 
Drives: jealous vendors mad!! HAHA!!
Join Date: Jan 2011
Location: CYBERGMONSTER@GMAIL.COM
Posts: 3,660
Quote:
Originally Posted by Grimlock View Post
Bmore and Hope - Both are you are MDers. How do you get around emissions? I ask because I'm on edge on buying some longtubes and the ones with hiflow are loads more than OBX.
To be honest I was going to chance it. There's no more tailpipe inspection in md. Just obd and visual. I know plenty of peoples who pass every year with no problems as long as your emission readiness is good which you can check with a obd scanner before you go. if all fail I guess I will have to put the factory header back on within 3 months. I was going to only use the obx until end of this year and replace with another long tube with high flow cats but it look like I will be doing that sooner than I thought.
bmorecam is offline   Reply With Quote
Old 03-05-2012, 11:24 AM   #22
cntryman77

 
cntryman77's Avatar
 
Drives: 2010 Camaro LS
Join Date: Mar 2010
Location: Newton Falls, OH
Posts: 1,070
Quote:
Originally Posted by Synergy1911 View Post
I believe so, hence the complaints about the "rusting" stainless. Chinese Stainless.
I don't know about rusting. Here is a pic of my OBX headers. I need to get out some polish & see what cleans off. These have been on my car for a year, so they've seen snow & salt for 2 seasons. My car is a daily driver. I don't really see any rust here, just a little bit of surface corrosion & you're going to have that with any grade stainless

__________________
cntryman77 is offline   Reply With Quote
Old 03-05-2012, 01:44 PM   #23
OOLIE

 
OOLIE's Avatar
 
Drives: 2011 LS
Join Date: Oct 2010
Location: FL
Posts: 1,644
Quote:
Originally Posted by Synergy1911 View Post
You are fine with a cheap product that breaks? I personally would spend a little more on a American made product with a good warranty. For example Doug Thorley has lifetime warranty on all their headers and ceramic coatings.

As for the OBX steel I have been trying to find out about SUS 304, seems that SUS is an Asian grading, anything with SUS that I found comes from China. 304 can also be called 18/8 stainless. The Gateway Arch is made of 304 stainless steel. So proper SS should not rust such as the OBX headers. 300 series steel is also non magnetic. 400 series is magnetic.

Just found this:

Why 409 type Stainless Steel pipes and shells?
-409 type Stainless Steel is specially designed for automotive exhaust systems.
-409 type Stainless Steel resists atmospheric and automotive exhaust gas corrosion.
-409 type Stainless Steel developes a light surface discoloring which will retard progressive corrosion.
-409 type Stainless Steel contains 10.5%...11.75% Chromium

Why 304(14G) type Stainless Steel tips, flanges, internals and brackets?
-304 type Stainless Steel contains 18%...20% Chromium and 8%...10.5% Nickel.
-304 type Stainless Steel has excellent heat, oxidation and corrosion resistance.
-304 type Stainless Steel Looks great and will shine for ever!

How to clean Stainless Steel .
-409 type Stainless Steel can be cleaned with non metallic pot scrub pads and soap, ammonia, liquid or powder detergent.
-304 type Stainless Steel can be cleaned with non metallic non abrasive cleaning pads or brushes with soap or liquid detergent, use "Chrome polish" if necessary.
-Do not clean with Steel Wool or a Steel Brush ---> surface rust will result.
*************
The most common stainless steel used by muffler shop is the T-409.
Borla uses T-304 stainless steel grade. It's why the price is so different. A Borla looks great and will shine for ever!
T-409 is good for peoples who live where there are no calcium or where the corrosion is not a problem.
T-304 is for north american and canadian peoples who want to keep their cars for more than 3 years in a corrosive environment"

Even our American made cars have isolated issues, there are quite a few that have had 0 problems with their OBX headers. Also it sounds like OBX is using the same stainless you mention others are too, not sure about the grading system you mention. I have had mine going on a year in a couple of months with zero problems.

I put the rest in pm Bmore, good luck hopefully you track it down soon. Sounds like the resonator might be good info since you already noticed a issue in that area.
__________________
OOLIE is offline   Reply With Quote
Old 03-05-2012, 02:09 PM   #24
bmorecam
Account Suspended
 
Drives: jealous vendors mad!! HAHA!!
Join Date: Jan 2011
Location: CYBERGMONSTER@GMAIL.COM
Posts: 3,660
Thanks oolie, got your pm

Been chasing this noise for almost a year. This same exact noise just got magnified about 2x ever since the new cam phase adjustment we are doing right now.

This is what I'm thinking. There's no doubt that my header is noisy. Now I don't know if I just happen to get a bad one or there's a possibility that I could be dealing with a leak that is almost impossible to find, maybe the cores got unloose as 2010_camaro said had happened to him before. Whatever the case might be, I been dealing with this hissing of air flowing through the header accompanied with what sound like a rattle snake tail rattling. I swear sometimes it sound like there's a rattle snake in my engine LOL. It hiss and rattle just like a rattle snake when I accelerate only on part throttle. Maybe it also does it on wot but I can't hear it, because on wot my engine and exhaust noise overtake everything.

Now the new cam phase adjustment increase VE by filling in the cylinders with extra air, so it compress much more increasing dynamic compression and gives a bigger power stroke which mean the hot gas should also exit with that much more force and volume. So if this is the case, then this might be the reason why my noisy header sound that much more noisier now. I'm waiting for vince to get back to me on this so I guess I will find out if my theory is correct.

I can't believe I been dealing with this for almost a year LOL.
bmorecam is offline   Reply With Quote
Old 03-05-2012, 02:29 PM   #25
OOLIE

 
OOLIE's Avatar
 
Drives: 2011 LS
Join Date: Oct 2010
Location: FL
Posts: 1,644
Sounds like you may be closing in on it possibly. I will say I have always heard the air rushing through especially when it shifts, but always just contributed it to the additional flow. If the flow is dramatically changed as you stated with the tune, then I would think every little sound would maybe blown up too. T

he rattle sound has me baffled though.
__________________
OOLIE is offline   Reply With Quote
 
Reply

Thread Tools

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
OK...I'm starting a better V6 exhaust examples thread!! KMPrenger Camaro V6 LLT Engine, Exhaust, and Bolt-Ons 557 09-07-2014 03:56 PM
Question about noise with OBX LT header bmorecam Camaro V6 LLT Engine, Exhaust, and Bolt-Ons 13 10-16-2011 03:54 PM
Dynatech's SuperMaxx Long Tube Header Packages On Sale!!! tbyrne V8 Bolt-Ons & Tunes 8 01-26-2010 01:31 PM
Dynatech Long Tube Header Packages Starting at $1245.99! tbyrne V8 Bolt-Ons & Tunes 7 08-06-2009 10:48 AM
Long tube header news! camaro1 Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons 69 04-12-2009 08:00 AM


All times are GMT -5. The time now is 10:14 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.