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

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Old 11-27-2011, 06:47 PM   #51
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Awesome...this should prove to be a very valuable thread to many people out there!
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Old 11-27-2011, 09:18 PM   #52
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Gonna get this done this week!....hopefully. Aiming for tomorrow after work.
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Old 11-29-2011, 08:10 AM   #53
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In the shop right now having it done. Nervous as hell. They're using your pictures as reference (Mach). They don't know how you got such a clean hole in the pipe or what you used to cap it off.


9:43am


10:25am


One side done.
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Old 11-29-2011, 08:30 AM   #54
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I would think a hole saw would do the trick.
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Old 11-29-2011, 08:33 AM   #55
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The highway drive was a success!! According to my scope app I lost about 10db. It doesn't sound like much but 10db is actually ALOT! My ears enjoyed it too. The drone at 75mph is totally gone! The MRT 2.0 now sounds just a bit louder then stock at cruise. But its still loud as hell when you step on it!!

The only time I got a drone is going uphill while keeping my speed constant. But that is still about 10 db quieter. Uphill before hit 86db now the highest I got was 76db I am totally happy with this mod.

Cruise at 75mph before was 82db now I get 72db....

This to me is the perfect exhaust.. It sounds mean like the MRT2.0 but 0 drone. I am able to listen to music at a quieter volume and have a conversation without the BRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR!

Great job and thanks for sharing this mod with us ! Now all I need to do is show these pics to my muffler guy and see what this cost would be.
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Old 11-29-2011, 08:49 AM   #56
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I would think a hole saw would do the trick.
I'd think so too...if I knew that existed, lol. Apparently they don't have one here, but he did alright without it.
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Old 11-29-2011, 11:29 AM   #57
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Absolutely love it! More details when I get home.
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Old 11-29-2011, 12:54 PM   #58
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Sweet!
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Old 11-29-2011, 01:02 PM   #59
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Old 11-29-2011, 01:06 PM   #60
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So, the Helmholtz pipe works. Mach's calculations seem to be spot on. I have 0 drone now as well! Even at low speeds, theres no annoying vibrations and i no longer have to get out of that drone rpm range. We both have a Vmax ported throttle body and Vararam intake (which made it easy for me to just copy his measurements). We don't know if that's a factor in the equation but would recommend you make your own calculations and get your own numbers to see what length of pipe to use. It absolutely does work though and I completely agree that this is now the perfect exhaust. It's quiet when I want to drive normally and still has sound when I want it.

Mach, if you can, can you post the equation for everyone to plug in their own numbers please?


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Old 11-29-2011, 01:42 PM   #61
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Well this is good news for all MRT ppls. Having just come off of the SOLO Mach X with J-Pipes, I can attest to this technology's effectiveness. Especially considering how freakin loud the SOLO w/ LT combo is. Go forth and mod.
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Old 11-29-2011, 01:45 PM   #62
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very interesting stuff indeed!!!
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Old 11-29-2011, 01:55 PM   #63
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Well this is good news for all MRT ppls. Having just come off of the SOLO Mach X with J-Pipes, I can attest to this technology's effectiveness. Especially considering how freakin loud the SOLO w/ LT combo is. Go forth and mod.
Yea if anyone is telling themselves "I've never heard of this Helmholtz stuff, it sounds like crap". Consider this:

1. Solo's cat-back system already has them...


2. So does the stock GM exhaust...
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Old 11-29-2011, 02:30 PM   #64
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In the shop right now having it done. Nervous as hell. They're using your pictures as reference (Mach). They don't know how you got such a clean hole in the pipe or what you used to cap it off.


9:43am


10:25am


One side done.

That looks great!!! I got a 2 inch hole saw from Ace hardware. Destroyed it by the 2nd hole. I reused the metal that the hole saw cut out as the cap!!! That's green thinking LOL.

Make sure the pipe doesn't touch the muffler on the sides. I actually welded the pipe to the muffler exit pipe were the 180 degree bend is to prevent any vibration.

Also remember that when you start the car you will still get the BRRRRRRRRR during choke operation. The reason being is that choke drone is 160 Hz. But after 10 seconds it goes away as the car goes out of choke. Remember the 29 inch pipe kills 120Hz drone. When this first happened.. I was like F&%K it didnt work. But once you get cruising you will notice a big difference.

EDIT: Just read that it all worked out for you!!! THAT'S GREAT!! It made my day!! ANOTHER MRT HELMHOLZ CONVERSION. We are the only 2 in existence now!!!

P.S. You owe me a beer!
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Next mod: Done!

Last edited by Mach; 11-29-2011 at 02:56 PM.
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Old 11-29-2011, 02:59 PM   #65
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That looks great!!! I got a 2 inch hole saw from Ace hardware. Destroyed it by the 2nd hole. I reused the metal that the hole saw cut out as the cap!!! That's green thinking LOL.

Make sure the pipe doesn't touch the muffler on the sides. I actually welded the pipe to the muffler exit pipe were the 180 degree bend is to prevent any vibration.

Also remember that when you start the car you will still get the BRRRRRRRRR during choke operation. The reason being is that choke drone is 160 Hz. But after 10 seconds it goes away as the car goes out of choke. Remember the 29 inch pipe kills 120Hz drone. When this first happened.. I was like F&%K it didnt work. But once you get cruising you will notice a big difference.

EDIT: Just read that it all worked out for you!!! THAT'S GREAT!! It made my day!! ANOTHER MRT HELMHOLZ CONVERSION. We are the only 2 in existence now!!!

P.S. You owe me a beer!
I definitely do! I am very grateful for your research and hard work, it turned out better than I imagined. And I had him tack weld the parts that were touching because I figured there might be some vibration.

PS - I like the sound of that "only 2 in existence now". :-)
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Old 11-29-2011, 03:08 PM   #66
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I definitely do! I am very grateful for your research and hard work, it turned out better than I imagined. And I had him tack weld the parts that were touching because I figured there might be some vibration.

PS - I like the sound of that "only 2 in existence now". :-)

It's a pleasure contributing to the C5 community!!!

Just wait till you get your ride on the highway. It's so quiet the road and wind noise will start driving you crazy. LOL

Mid Dec I am doing this... http://www.amazon.com/Raptor-Truck-B...2600790&sr=8-1

Product Features

  • Tough, durable 2 part urethane coating
  • Enough material to re-spray the largest truck beds
  • Dries rapidly & UV resistant Scratch & stain resistant
  • Protects against rust, corrosion salt, damp & extreme temperatures
  • Waterproof, flexible, helps deaden sound & vibrations

This is bomb proof stuff. Thinner and more rubberized then the standard truck bed liner. I will paint all the exposed metal on entire bottom of the car and the metal behind the fender plastic fender skirts. This will quiet the car down even more because its like liquid Dynamat and prevent any rust. Just in time for winter!
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Next mod: Done!
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Old 11-29-2011, 04:10 PM   #67
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Keep me updated on that.
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Old 11-30-2011, 08:27 AM   #68
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I've updated my original post and added more photos to it.
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Old 11-30-2011, 09:31 AM   #69
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if you want a quiet car why didn't you get a prius lol. Idk maybe me but looks a little redic to see that piping from the back of the car. but glad you found the culprit of the drone for people
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Old 11-30-2011, 09:34 AM   #70
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if you want a quiet car why didn't you get a prius lol. Idk maybe me but looks a little redic to see that piping from the back of the car. but glad you found the culprit of the drone for people
No one said he wanted quiet... Being a Camaro forum, i think a Volt would be a better choice than the Prius... LOL
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Old 11-30-2011, 09:42 AM   #71
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haha true good call
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Old 11-30-2011, 10:18 AM   #72
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i understand this exhaust drone situation, i do not completey agree with it though, sorry if i am sort of hyjacking this thread, but for me, and possibly others, this is a SPORTS car, and as in the past with these types of cars, louder pipes go hand in hand with that, and to add the cost of the exh. then install. then added pipe,and then weld cost and install price...yikes...costs are lots i think? so forsome i think the sound and drone can be tolorated. thanks for all your info and work on this project. i learned a lot. luv ya man! ryd
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Old 11-30-2011, 10:50 AM   #73
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if you want a quiet car why didn't you get a prius lol. Idk maybe me but looks a little redic to see that piping from the back of the car. but glad you found the culprit of the drone for people
My goal wasn't to have a quiet car and I don't have one now. I got MRT because I liked the sound and I still have that. Only now, no drone. So I am still louder than stock and far from a prius. The sound of the exhaust is still there but no annoying vibration and echoing inside the cabin. And that picture from behind the car is take from a low angle while the car is still up on the lift. On the ground, you can't see the new piping. They run up and over the MRT's as well and you can barely even see the mufflers to begin with because they're angled upwards. So nothin can be seen from the back. Besides, anything looks better than the stock cans.


Quote:
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i understand this exhaust drone situation, i do not completey agree with it though, sorry if i am sort of hyjacking this thread, but for me, and possibly others, this is a SPORTS car, and as in the past with these types of cars, louder pipes go hand in hand with that, and to add the cost of the exh. then install. then added pipe,and then weld cost and install price...yikes...costs are lots i think? so forsome i think the sound and drone can be tolorated. thanks for all your info and work on this project. i learned a lot. luv ya man! ryd
Yes, this is a sports car and i agree that louder pipes go hand in hand with them. This is why I got the MRT in the first place. However, I'm not lucky enough to have a second car. This is my every day car all year around. So sound is one thing, drone is another. If I'm commuting or even driving my girlfriend and I around for a while, a constant humming and vibration can get very annoying. This mod gets rid of the drone and vibration from it, not the sound. Nobody gets a new exhaust hoping to get a good sounding drone. It's hard to get my point across that drone is gone but sound is still there because I know some people can confuse them as being the same thing (not saying that you are). This is still and MRT sound, still louder than stock. Everything one would want when buying an MRT is still there. I don't know how else to explain it.

Oh and I bought the MRT but installed it myself, so there's no install fee. The pipes I got from Summit on eBay which wasn't a major cost and, yes, I paid a welder for the work, which I feel was worth the cost because I don't own a mig welder (yet.....Christmas gift). Mach did his own I believe so it only cost him the pipes on eBay. Well worth it only IF you are having this problem. If you can tolerate it and it's not worth modding, then fine. I understand it isn't an issue to a lot of people.
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Old 11-30-2011, 10:52 AM   #74
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No one said he wanted quiet...
Thank you
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Old 11-30-2011, 11:21 AM   #75
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My goal wasn't to have a quiet car and I don't have one now. I got MRT because I liked the sound and I still have that. Only now, no drone. So I am still louder than stock and far from a prius. The sound of the exhaust is still there but no annoying vibration and echoing inside the cabin. And that picture from behind the car is take from a low angle while the car is still up on the lift. On the ground, you can't see the new piping. They run up and over the MRT's as well and you can barely even see the mufflers to begin with because they're angled upwards. So nothin can be seen from the back. Besides, anything looks better than the stock cans.




Yes, this is a sports car and i agree that louder pipes go hand in hand with them. This is why I got the MRT in the first place. However, I'm not lucky enough to have a second car. This is my every day car all year around. So sound is one thing, drone is another. If I'm commuting or even driving my girlfriend and I around for a while, a constant humming and vibration can get very annoying. This mod gets rid of the drone and vibration from it, not the sound. Nobody gets a new exhaust hoping to get a good sounding drone. It's hard to get my point across that drone is gone but sound is still there because I know some people can confuse them as being the same thing (not saying that you are). This is still and MRT sound, still louder than stock. Everything one would want when buying an MRT is still there. I don't know how else to explain it.

Oh and I bought the MRT but installed it myself, so there's no install fee. The pipes I got from Summit on eBay which wasn't a major cost and, yes, I paid a welder for the work, which I feel was worth the cost because I don't own a mig welder (yet.....Christmas gift). Mach did his own I believe so it only cost him the pipes on eBay. Well worth it only IF you are having this problem. If you can tolerate it and it's not worth modding, then fine. I understand it isn't an issue to a lot of people.
I COMPLETELY understand your point!!! I am very impressed with your guys job with these pipes!!! Nice job!
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