OEM Exhaust flaps

[Ramit392]

On a Hellcat you can wire the flaps to stay open while the exhaust is cold before you start it. Will not get any codes, and you do not have to change your exhaust. I'm sure you would be able to do the same on the exhaust of the RHO. Look for the box on the exhaust and that's it! You will see what I'm talking about once you follow it. It will not hurt anything, can change it back when you want.

 

[tbolts10]

On a Hellcat you can wire the flaps to stay open while the exhaust is cold before you start it. Will not get any codes, and you do not have to change your exhaust. I'm sure you would be able to do the same on the exhaust of the RHO. Look for the box on the exhaust and that's it! You will see what I'm talking about once you follow it. It will not hurt anything, can change it back when you want.

The RHO valved are not electronic, they are flow controlled.

 

[frogjbm]

I've made another video with the mics placed in a better location. You still get a bit of road noise but that's unavoidable while driving. This is still my original setup. Please let me know what you guys think about it. The is an external mic set up, no interior sound clips were made.

So he only thing done here was removing the mechanical flaps so it’s constantly open?

 

[MRT Performance]

The RHO valved are not electronic, they are flow controlled.

We've heard from several individuals who worked on the TRX that flow-controlled valves were chosen over electronic valves because, during shakedown testing in extreme desert conditions, closed electronic valves were causing catalytic converters to overheat and fail. While we can't confirm this with absolute certainty, it's what we've been told, and we wouldn't be surprised if the same thought process was applied to the RHO.

 

[frogjbm]

We've heard from several individuals who worked on the TRX that flow-controlled valves were chosen over electronic valves because, during shakedown testing in extreme desert conditions, closed electronic valves were causing catalytic converters to overheat and fail. While we can't confirm this with absolute certainty, it's what we've been told, and we wouldn't be surprised if the same thought process was applied to the RHO.

Yea I’m removing mine permanently.

 

[Ctech-Review]

Ram was smart to go with a dummy passive valve vs the active Valve ford went with. The Ford system is substantially more expensive and brings other problems...but the Raptor Exhaust system stock sounds great.

 

[MattH89]

We've heard from several individuals who worked on the TRX that flow-controlled valves were chosen over electronic valves because, during shakedown testing in extreme desert conditions, closed electronic valves were causing catalytic converters to overheat and fail. While we can't confirm this with absolute certainty, it's what we've been told, and we wouldn't be surprised if the same thought process was applied to the RHO.

Are the valves in the portion of the exhaust that's replaced by your system?

 

[MRT Performance]

Are the valves in the portion of the exhaust that's replaced by your system?

Yes, the valves are positioned on the stock muffler inlet tubes, just after the factory clamps.

 

[Dcchris311]

So he only thing done here was removing the mechanical flaps so it’s constantly open?

No, I've added an x-pipe to help with the sound and also 2 resonators for a slightly deeper tone than a system with just straight pipes.

 

[Dcchris311]

Sounds damn good to me. What are you hoping to accomplish with the Y pipe setup?

I'm going for a deeper tome and I also want the exhaust pulses to combine for a smoother sound. So it'll be a y-pipe feeding a resonator which also act like a expansion chamber and in theory it SHOULD get rid of some drone/rasp and then back into a y-pipe so it ties into the oem system.

 

[Ramit392]

The RHO valved are not electronic, they are flow controlled.

That is great!!! Wish the Hellcats were!!

 

[Jeffhallphotos]

Can someone show a picture or a diagram or something that shows where the valves are? I would love a video that explains more about this.

 

[MurphNH]

Can someone show a picture or a diagram or something that shows where the valves are? I would love a video that explains more about this.

Turbo/wastegate actuator rattle!

I’m not hearing anything 🤷🏼‍♂️ Focus on the 9-18 second mark of the video - it comes and goes twice. If it were only at start up it probably wouldn't bother me, but it does it at slow speeds as well. The pitch sounds similar to a squeaky belt or bad wheel bearing when cruising thru the...

www.ram-rho.com

They are both near the passenger rear tire. You can see my post from the attached thread but if you want a video just refer to GMC/Chevy videos since there are plenty of them to watch and it is identical on how you peg the valves open.
https://www.ram-rho.com/threads/exhaust-options.1500/ Post 15-17 I did a brief write-up with a couple of pictures.

 

[frogjbm]

So does anyone know the value these add other than sound management, if anything, like back pressure for turbos preventing lag, etc?

 

[Cridder131]

I started hearing the same thing. Let me know what you find

I feel like I occasionally hear the same.

 

[Dan G]

Can someone show a picture or a diagram or something that shows where the valves are? I would love a video that explains more about this.

Here’s the location and what they look like. Honestly almost 0 difference on cold start/idle. I didn’t clamp them down and drive with them open but I got under it and twisted both open and close to see if I could hear a difference..

I’d bet you hear a difference under acceleration but otherwise sounded the same on start up

 

[MurphNH]

Here’s the location and what they look like. Honestly almost 0 difference on cold start/idle. I didn’t clamp them down and drive with them open but I got under it and twisted both open and close to see if I could hear a difference..

I’d bet you hear a difference under acceleration but otherwise sounded the same on start up

I found the sound change was very noticeable at warm idle and while driving. Cold start rpm's are so high I bet they are mostly open regardless of doing the mod or not which makes it less noticeable. Open one up after it kicks down and you will hear the difference.

 

[Dan G]

I found the sound change was very noticeable at warm idle and while driving. Cold start rpm's are so high I bet they are mostly open regardless of doing the mod or not which makes it less noticeable. Open one up after it kicks down and you will hear the difference.

That makes so much sense . I’ll have to try it. Does it drone at all? Also can you post photo how you clamped it?

 

[Jdmdc5teg06]

Hmm I’m thinking of doing this one of these weeks

 

[Jdmdc5teg06]

So you didn’t cut the exhaust or do any exhaust modification at all right? Just clamped the valves open 100% of the time and you do hear a bit of a difference at lower rpms/ warm?