Aerie Ti Emira exhaust installation

[XEPOBO]

I am considering going with Aerie exhaust (everything else stock, no Y pipe).
Questions:
1. Does anyone have a sound sample with this sample (stock vs upgrade). Does insulated Y pipe has a noticeable difference in performance/sound?
2. Earlier int he threat I saw that exhausts required Y pipe change, is that still the case with latest shipment or stock Y pipe is ok now (still needs a crush washer etc?)
3. With latest stock valve actuator adapter spring can someone confirm that recalibration is not needed and install works as a drop in replacement.

Thank you

 

[Eagle7]

To those who've replaced the factory exhaust with the Aerie, how do you get the factory exhaust loose? Lotus tack-welded the clamp onto the muffler so I can't remove it to spread the joints on the pipe to slide it off the cat. I've loosened the nut tightening the clamp, but of course I can't move the clamp. I've removed the bolts holding the muffler on the ends, but I can't move the muffler off the cat. I thought I'd be able to slide the muffler towards the back to clear the cat pipe, then back and down, but it looks like everything is just slightly in the way, which is typical of a British sports car. Nothing wants to cooperate.

Is there a trick to this that I'm not seeing? Any tips on how to remove and reinstall the @Aerie?

 

[Aerie]

To those who've replaced the factory exhaust with the Aerie, how do you get the factory exhaust loose? Lotus tack-welded the clamp onto the muffler so I can't remove it to spread the joints on the pipe to slide it off the cat. I've loosened the nut tightening the clamp, but of course I can't move the clamp. I've removed the bolts holding the muffler on the ends, but I can't move the muffler off the cat. I thought I'd be able to slide the muffler towards the back to clear the cat pipe, then back and down, but it looks like everything is just slightly in the way, which is typical of a British sports car. Nothing wants to cooperate.

Is there a trick to this that I'm not seeing? Any tips on how to remove and reinstall the @Aerie?

Instruction send to you email, please check and let me know if you need anything assist.

 

[Eagle7]

Instruction send to you email, please check and let me know if you need anything assist.

Got it! Thank you!!

 

[Eagle7]

Okay here's the problem right here, where it says "move clamp onto silencer assembly". The clamp on mine is situated so the bolt is on the bottom, and the top of the clamp is tack-welded to the pipe. I'm going to have to see if I can figure out a way to break that tack weld.

 

[Time2Fly]

Okay here's the problem right here, where it says "move clamp onto silencer assembly". The clamp on mine is situated so the bolt is on the bottom, and the top of the clamp is tack-welded to the pipe. I'm going to have to see if I can figure out a way to break that tack weld.

View attachment 50379

Loosen the clamp. Detach cat from silencer. Wiggle cat into y pipe a little. Rotate it down into the area between the rear sway bar and whatever that bulkhead is. Then pull it free.

 

[Aerie]

Loosen the clamp. Detach cat from silencer. Wiggle cat into y pipe a little. Rotate it down into the area between the rear sway bar and whatever that bulkhead is. Then pull it free.

Thank you for your information

 

[Jonattan]

I think that the geometry is slightly different - so the valve travel needs recalibrating. I could also hear chatter when the servo tried to close the valve (there is a lot of back pressure on it).

The OBD KILLER worked for me to eliminate the CEL and reduced redline. But the valve chatter still could be problematic over time.


My ideal setup would be Titanium y-pipe and Titanium valve-less and silencer-less straight exhaust @Aerie

Hi, I´m having issues with the Exhast valve motor, it Melted!!, so I fixed the connector but I get P1018, do you think the OBD Killer will help with this, because I get Engine Power Reduced inmediatelly everytime I press the gas pedal.
I was thinking on buying the Milltek exhaust valve control just for the codes, but they told me that is not a warranty that code will dissapear if motor is broken.

Greetings.

 

[crashprash]

Woke up at 5am to go for a drive through the twisties (Wisemans Ferry for the Sydney AU locals). As soon as I started the car, there was a loud pop. No errors on the dash so I started driving. However, when I got to the twisties and used the Miltek remote to open the exhaust valve, nothing. None of the buttons seemed to do anything. I pulled over, went to the back of the car and noticed when pressing the buttons, there does seem to be a vacuum sound and motor sound so I am assuming the valve controller is working and so is the valve motor which leads me to believe it something to do with the valve or the valve spring. I have contacted @Aerie about this. Putting it in Sport or Track and going over 4k rpm also didn't open the valves. Scanned with OBD tool and no error codes.

Annoying that I have go back to the Lotus dealership this week and hopefully get this resolved as I have a track day booked next week and definitely can't do it with valves forced closed.

 

[Sentinel]

Woke up at 5am to go for a drive through the twisties (Wisemans Ferry for the Sydney AU locals). As soon as I started the car, there was a loud pop. No errors on the dash so I started driving. However, when I got to the twisties and used the Miltek remote to open the exhaust valve, nothing. None of the buttons seemed to do anything. I pulled over, went to the back of the car and noticed when pressing the buttons, there does seem to be a vacuum sound and motor sound so I am assuming the valve controller is working and so is the valve motor which leads me to believe it something to do with the valve or the valve spring. I have contacted @Aerie about this. Putting it in Sport or Track and going over 4k rpm also didn't open the valves. Scanned with OBD tool and no error codes.

Annoying that I have go back to the Lotus dealership this week and hopefully get this resolved as I have a track day booked next week and definitely can't do it with valves forced closed.

There’s a small hole in the diffuser that conveniently allows you to see the valve actuator at work. Set your phone recording and go start the car and press the buttons. Post the video and I’ll be able to tell you what’s wrong (don’t ask how I know )

 

[crashprash]

There’s a small hole in the diffuser that conveniently allows you to see the valve actuator at work. Set your phone recording and go start the car and press the buttons. Post the video and I’ll be able to tell you what’s wrong (don’t ask how I know )

Best I could do. Clearly visible to the naked eye (can hear it as well) that the actuator is working but obviously no change with the valve itself inside the exhaust. Extremely frustrated as my Aerie v1 exhaust didn't have any issue (when others did with the valve) and they assured me everything was fixed in the v2 version.

Didn't record me pressing the remote buttons but it's obvious from the clicking sound the actuator makes as to when I am pressing the buttons on the remote.
Video 1
Video 2
Video 3

 

[Eagle7]

Best I could do. Clearly visible to the naked eye (can hear it as well) that the actuator is working but obviously no change with the valve itself inside the exhaust. Extremely frustrated as my Aerie v1 exhaust didn't have any issue (when others did with the valve) and they assured me everything was fixed in the v2 version.

Didn't record me pressing the remote buttons but it's obvious from the clicking sound the actuator makes as to when I am pressing the buttons on the remote.
Video 1
Video 2
Video 3

In Video 2 you can see the valve controller is moving the loop spring that connects the controller to the valve, so the controller is working. Maybe the valve inside the exhaust tube broke?

 

[Sentinel]

Best I could do. Clearly visible to the naked eye (can hear it as well) that the actuator is working but obviously no change with the valve itself inside the exhaust. Extremely frustrated as my Aerie v1 exhaust didn't have any issue (when others did with the valve) and they assured me everything was fixed in the v2 version.

Didn't record me pressing the remote buttons but it's obvious from the clicking sound the actuator makes as to when I am pressing the buttons on the remote.
Video 1
Video 2
Video 3

Yep that’s very strange. Externally appears to be operating correctly. Curious to know if you get a CEL if you put your foot down in sport mode.

My V1 exhaust valve never opened fully even after recalibration so the valve was always a bit closed. Same as you, exhaust sounded the same regardless of the valve controller setting.

 

[crashprash]

In Video 2 you can see the valve controller is moving the loop spring that connects the controller to the valve, so the controller is working. Maybe the valve inside the exhaust tube broke?

View attachment 53252

Yeah this what I suspect as well. Could explain the sound I heard on startup

 

[crashprash]

Yep that’s very strange. Externally appears to be operating correctly. Curious to know if you get a CEL if you put your foot down in sport mode.

My V1 exhaust valve never opened fully even after recalibration so the valve was always a bit closed. Same as you, exhaust sounded the same regardless of the valve controller setting.

No CEL despite anything I did in any of the modes

 

[Eagle7]

Yeah, if the spindle connected to the valve snapped inside, that would do it. Looks like it may have snapped with the valve in the Tour mode position, so at least it isn't hurting anything or throwing any codes.

 

[Aerie]

Woke up at 5am to go for a drive through the twisties (Wisemans Ferry for the Sydney AU locals). As soon as I started the car, there was a loud pop. No errors on the dash so I started driving. However, when I got to the twisties and used the Miltek remote to open the exhaust valve, nothing. None of the buttons seemed to do anything. I pulled over, went to the back of the car and noticed when pressing the buttons, there does seem to be a vacuum sound and motor sound so I am assuming the valve controller is working and so is the valve motor which leads me to believe it something to do with the valve or the valve spring. I have contacted @Aerie about this. Putting it in Sport or Track and going over 4k rpm also didn't open the valves. Scanned with OBD tool and no error codes.

Annoying that I have go back to the Lotus dealership this week and hopefully get this resolved as I have a track day booked next week and definitely can't do it with valves forced closed.

We are received your WhatsApp today and we just contacted with factory see what happens on the valve, we will assist with you vie whatapp and solve the problem immediately.

 

[crashprash]

Yeah, if the spindle connected to the valve snapped inside, that would do it. Looks like it may have snapped with the valve in the Tour mode position, so at least it isn't hurting anything or throwing any codes.

Yeah the Miltek was in OEM mode on startup so that's what it is probably stuck on. Since the Miltek always sends an OK signal for the the factory valve position, doubt it would throw any codes anyway.

 

[Sentinel]

Yeah the Miltek was in OEM mode on startup so that's what it is probably stuck on. Since the Miltek always sends an OK signal for the the factory valve position, doubt it would throw any codes anyway.

Yeah quite possibly. I was this under the impression that in OEM mode it would pass though rather than just sending OK all the time but maybe I’m wrong.

 

[lynchy73]

In Video 2 you can see the valve controller is moving the loop spring that connects the controller to the valve, so the controller is working. Maybe the valve inside the exhaust tube broke?

View attachment 53252

The I4 Ti Exhaust I have, has a different spring arrangement to this. I got a CEL first time I gave it some power/revs. It does seem I’m getting a faint rattle at tickover, noticed on left pipe.

The spring/coupling I have, would cause the valve and motor to be offset 90degs, but this new coupling aligns them. 90degs difference between the couplings is a big difference. New spring, no other change? Seems a bit strange to me.