Jump to content

Exhaust Adaptive Valve

MotoMedic

By MotoMedic
in Engines & Drivetrain

 Share

Recommended Posts

MotoMedic Senior Enthusiast

MotoMedic

Posted
Posted

Anyone else notice the "adaptive valve" just after the muffler? Looks like it's a simple spring-operated flapper valve. Explains why, when I rev my engine, the intake is louder than the exhaust! ha

Got my Magnaflow 5x8x18 today... add it to this week's "To Install" list.

  • Replies 140
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

CorvetteOJ
CorvetteOJ

Hey Medic, when I read your post, I immeidately remembered when I was a kid, (teenager) guys would stick raw potatoes on the end of someone's exhaust pipe, and in most cases, would get the same effect

iCryWheniGoPoop
iCryWheniGoPoop

What Dave said... whats it going to hurt anyway, just put a $2 hose clamp on it for now and see if you like it. If you don't... crawl back underneath it and take 30 seconds to pull it back off. Its ha

45acp
45acp

I like the hose clamp idea. Cheap and easy to try and if you don't like it take it off.   DJ

Posted Images

RyanbabZ71 Senior Enthusiast

RyanbabZ71

Posted
Posted

my camaro has that. Need to figure out how to disable one day

BringTheRain403 Senior Enthusiast

BringTheRain403

Posted
Posted
Anyone else notice the "adaptive valve" just after the muffler? Looks like it's a simple spring-operated flapper valve. Explains why, when I rev my engine, the intake is louder than the exhaust! ha

Got my Magnaflow 5x8x18 today... add it to this week's "To Install" list.

 

Before and after video please!

 

Sent from my SCH-I535 using Tapatalk 2

 

 

TimmyG Senior Enthusiast

TimmyG

Posted
Posted

I have seen that on motorcycles but not a car yet

 

Sent from my SCH-I535 using Tapatalk 2

06Voy Enthusiast

06Voy

Posted
Posted

I assume it is the same as what the corvettes have had for several years as an option with the butterfly valve that opens under hard acceleration to make the exhaust louder. There may be a fuse somewhere you can pull that will leave it open.

MotoMedic Senior Enthusiast

MotoMedic

Posted
  • Author
Posted (edited)

It's a dumb-valve, as in spring tension is the only thing that controls opening/closing. Looking at it up close, I'm surprised how inefficient the shape is... maybe it helps the truck perform better when in V4 mode..? Dunno. I'm no exhaust expert, but it sure looks like it would really disrupt any smooth/laminar flow the exhaust might have had.

 

*EDIT: It normally swings both ways freely, but I had to open it in reverse for the pic b/c of the metal slag left over when pipe was cut so close to valve.

post-34923-0-88952400-1374607399_thumb.jpg

post-34923-0-88952400-1374607399_thumb.jpg

post-34923-0-88952400-1374607399_thumb.jpg

post-34923-0-88952400-1374607399_thumb.jpg

Edited by MotoMedic
  • Like 2
MotoMedic Senior Enthusiast

MotoMedic

Posted
  • Author
Posted

Oh yeah, I installed my 5x8x18 Magnaflow muffler today. I decided to leave in the resonator (it's near the spare tire on 2014's) for now so I could judge volume/drone with new muffler. Before there was virtually no sound from the exhaust. Under hard acceleration you could only hear the intake. Now it sounds like a normal truck. A little bit at idle and a good clean sound when accelerating but nothing loud or "look at me" annoying. For those that want to be heard, I definitely suggest removing the resonator and going with a smaller muffler (that's if you're buying the straight flow-through style; chambered mufflers like Flowmaster might sound completely different).

  • Like 1
  • 2 weeks later...
b1gted Enthusiast

b1gted

Posted
Posted

How does it sound in V4 mode and switching in and out of V4/V8 mode?

MotoMedic Senior Enthusiast

MotoMedic

Posted
  • Author
Posted

From inside the cab, there's no sound when in V4 mode. V8 has a nice low rumble.

Basically the same as the GMT-900's when switching.

cobrajet84 Senior Enthusiast

cobrajet84

Posted
Posted

This has nothing to do with your exhaust motomedic, but on your truck did you get both the sliding and defrost rear glass, was building online and trying to figure out which configurations had it.

BringTheRain403 Senior Enthusiast

BringTheRain403

Posted
Posted
This has nothing to do with your exhaust motomedic, but on your truck did you get both the sliding and defrost rear glass, was building online and trying to figure out which configurations had it.

 

The preferred package has it...

 

Sent from my SCH-I535 using Tapatalk 2

 

 

cobrajet84 Senior Enthusiast

cobrajet84

Posted
Posted

The preferred package has it... Sent from my SCH-I535 using Tapatalk 2

cool thanks, sorry to hijack the exhaust thread.

  • 1 month later...
GPlancarte Enthusiast

GPlancarte

Posted
Posted

Oh yeah, I installed my 5x8x18 Magnaflow muffler today. I decided to leave in the resonator (it's near the spare tire on 2014's) for now so I could judge volume/drone with new muffler. Before there was virtually no sound from the exhaust. Under hard acceleration you could only hear the intake. Now it sounds like a normal truck. A little bit at idle and a good clean sound when accelerating but nothing loud or "look at me" annoying. For those that want to be heard, I definitely suggest removing the resonator and going with a smaller muffler (that's if you're buying the straight flow-through style; chambered mufflers like Flowmaster might sound completely different).

would replacing the stock muffler void the warranty because of that valve?

BringTheRain403 Senior Enthusiast

BringTheRain403

Posted
Posted

In order for something to void the warranty they would need to prove that the issue you were having was caused by the modification...

 

 

 

Sent from my Galaxy Nexus using Tapatalk 2

 

 

  • Like 1

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • lanaderay
      5 Best Slide Down Gameplay Tips! 

      By lanaderay · Posted

      Are you playing Slide Down endlessly but your score is still low? Are you constantly crashing into obstacles as the game speed increases? Don't worry, this article will share 5 invaluable tips to help you master the race and impress your friends. Golden Rules 1. Look one step further. The mistake of 90% of new players is only staring at their character. The secret of experts is to look towards the top of the screen (where the slide is about to appear). This gives your brain an extra 0.5 - 1 second to process the situation and determine the direction of movement before the obstacle approaches. 2. Use gentle movements; don't swipe too hard. Slide Down is very sensitive. Moving your finger too forcefully or with excessive amplitude will cause your character to be thrown off course or crash into a wall. Practise moving your finger with small, decisive, and precise movements. 3. Don't be greedy for gold in dangerous locations. Gold coins are tempting for buying skins, but life is more important. If you see a gold coin right on the edge of a cliff or next to a spike trap, ignore it. Our goal is a High Score, and your score only increases if you survive. 4. Make the most of Power-ups. During the slide, you'll encounter items like Magnets (attract gold) or Shields (temporary invincibility). Never miss them! Especially the Shield, it's your "get out of jail free card" to help you get through those deadly fast sections. 5. Stay calm when speed peaks. When your score exceeds 500 or 1000, the game speed will be very fast. At this point, don't try to think logically; let your natural reflexes work. Take deep breaths and don't panic. Apply these 5 tips to your next game, and your leaderboard will surely improve dramatically. Good luck climbing the Slide Down leaderboard!
    • lingyuair
      Why I Recommend a Desiccant Air Dryer for Cleaner, Drier Compressed Air

      By lingyuair · Posted

      If you use compressed air regularly, one problem you cannot ignore is moisture. Water in the air line can cause rust, unstable air pressure, poor tool performance, and even damage to sensitive equipment. That is why I highly recommend using a desiccant air dryer. A desiccant air dryer is designed to remove moisture from compressed air by using drying materials such as activated alumina or molecular sieve. Compared with basic water separators, it can achieve much lower dew points, making it especially useful for applications that require dry and stable air. For workshops, painting systems, pneumatic tools, CNC machines, laser cutting equipment, and industrial production lines, a desiccant air dryer can make a big difference. It helps protect equipment, improve air quality, reduce maintenance costs, and extend the service life of the whole compressed air system. Another advantage is reliability. Many desiccant air dryers are built for continuous operation and can maintain stable drying performance even in demanding environments. For users who care about long-term efficiency and equipment protection, this is a smart investment. When choosing a desiccant air dryer, I suggest paying attention to air flow capacity, working pressure, dew point performance, regeneration method, and maintenance requirements. A good model should match your compressor system and actual air consumption. Overall, if moisture is causing problems in your compressed air system, a desiccant air dryer is definitely worth considering. It is practical, efficient, and highly useful for anyone who needs clean, dry, and reliable compressed air.
    • Jsdirt
      2027 GMC Sierra: Official Discussion

      By Jsdirt · Posted

      My brand new 2007 Silverado's wax frame was rust from end to end partway through it's SECOND winter here in MA. That stuff is completely useless.    
    • Jsdirt
      2027 GMC Sierra: Official Discussion

      By Jsdirt · Posted

      I went another direction after losing a trailer tire, thanks to not being able to access air at ANY of the 5 gas stations and garages I stopped at prior, with a Toyota Tacoma onboard, 50 miles from the Canadian border. They were either out of order, access was blocked, or the hose a few feet too short and I couldn't get any closer without risking damage to someone's property.   https://postimg.cc/gallery/X5QJ55w
    • Another JR
      Remote Start Noise 2024 2500 HD Gas

      By Another JR · Posted

      I took a 12 second video on my iphone but the file is too big to upload. I will have to figure out how to extract the audio or just do another start with an audio recording. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...