Houston we have a Problem!

[Tracked Emira]

Update to limp mode. After due diligence my lotus dealer concluded that the stock valve controller melted due to extreme temperatures when tracking the car. The fuse blew as well tracking in 70 degree weather after 3 track runs.
The GRP titanium exhaust runs hotter than the stock exhaust so they recommended wrapping it. The Arie diffuser does not have the ducting that the stock diffuser has so the cooling is not as good. They recommend going back to stock or modifying it to help cool the rear.
Milltek has been cleared of causing the issue, but you should definitely get Version 2 and wrap the wires.
They disconnected the valve controller so I have to live with a check engine light, but limp mode is not there now and code was cleared. Anyone else who hasn’t had this issue hasn’t been thrashing their car to this level. Who else is in this position?

 

[NJemira85]

Sounds like the aerie diffuser lacking ventilation in conjunction w the titanium exhaust is making things a little too spicy out back.

In the aerie diffuser carbon? Not very airy

Hard to drill in carbon maybe? I’ve never tried

 

[Tracked Emira]

Sounds like the aerie diffuser lacking ventilation in conjunction w the titanium exhaust is making things a little too spicy out back.

In the aerie diffuser carbon? Not very airy

Hard to drill in carbon maybe? I’ve never tried

Diffuser is carbon fiber
Valve controller only comes with full exhaust from factory.
Does anyone know where you can buy the valve controller by itself?

 

[sbproducer]

Update to limp mode. After due diligence my lotus dealer concluded that the stock valve controller melted due to extreme temperatures when tracking the car. The fuse blew as well tracking in 70 degree weather after 3 track runs.
The GRP titanium exhaust runs hotter than the stock exhaust so they recommended wrapping it. The Arie diffuser does not have the ducting that the stock diffuser has so the cooling is not as good. They recommend going back to stock or modifying it to help cool the rear.
Milltek has been cleared of causing the issue, but you should definitely get Version 2 and wrap the wires.
They disconnected the valve controller so I have to live with a check engine light, but limp mode is not there now and code was cleared. Anyone else who hasn’t had this issue hasn’t been thrashing their car to this level. Who else is in this position?

What's the best way to wrap the wires on the Milltek V2 Controller? (material)

 

[crestima]

What's the best way to wrap the wires on the Milltek V2 Controller? (material)

I've used this to insulate wiring from heat.

https://www.amazon.com/dp/B07HXSL2SH?ref_=ppx_hzod_title_dt_b_fed_asin_title_0_0

 

[Mr. Sparkle]

I've used this to insulate wiring from heat.

https://www.amazon.com/dp/B07HXSL2SH?ref_=ppx_hzod_title_dt_b_fed_asin_title_0_0

Any downside to just using gold heat reflective tape do you think?

 

[crestima]

Any downside to just using gold heat reflective tape do you think?

I suppose that would work well too since as it's definitely a good insulator against radiant heat. The only downside that I can think of is that it could be a bit challenging to wrap around and stay in place when placing it on such thin wiring strands.

 

[silent cilantro]

The Arie diffuser does not have the ducting that the stock diffuser has so the cooling is not as good.

Just to clarify, when you say diffuser, are you referring to this piece?

What ducting does the factory one have that this one doesn’t?

I think your wiring/controller was just too close to the exhaust and/or not shielded properly and that’s what caused the issue.

It has happened to several people with stock “diffusers”. Either their entire box melted or the wires inside the harness melted and caused a short.

 

[675430VME]

Ti exhaust emits too much heat and the Emira's exhaust compartment is poorly designed for heat ventilation. Heat protection wrap might not be ideal for trapping the heat inside a Ti exhaust for long run so from tracking experience in China, SS exhaust might be a better choice for now. You might also want to consider moving the location of the valve control unit to a cooler location like Boomgear did for mine.

 

[Tracked Emira]

I apologize to Aerie because their part sits on the top section of the CT carbon diffuser.
This is the diffuser made by CT carbon that dealer says isn't directing cool air to valve controller as well. But is it relly such a big difference from stock air flow???
And again to clear up. The Milltek that controls the valve controller didn't melt. It was the stock valve controller that is now completely disconnected.

 

[Tracked Emira]

Ti exhaust emits too much heat and the Emira's exhaust compartment is poorly designed for heat ventilation. Heat protection wrap might not be ideal for trapping the heat inside a Ti exhaust for long run so from tracking experience in China, SS exhaust might be a better choice for now. You might also want to consider moving the location of the valve control unit to a cooler location like Boomgear did for mine.
View attachment 71055

I've seen that you've had your valve controller moved in another thread, but is it really needed?
Other than a check engine coming on because it is now disconnected will it affect performance or anything else?

 

[Tracked Emira]

 

[Tracked Emira]

 

[Tracked Emira]

 

[Tracked Emira]

 

[Tracked Emira]

Can the stock valve controller be purchased separatly?

 

[675430VME]

I've seen that you've had your valve controller moved in another thread, but is it really needed?
Other than a check engine coming on because it is now disconnected will it affect performance or anything else?

Emira owners in China had the exact same problem you have with our first generation exhausts like Aerie's design which vendors have updated to avoid heating problem. My setup is the fourth version of Boomgear's exhaust that Ryan had put serious laptime on and exhibit no problem whatsoever. Is it really needed? You never know until you have a problem.

 

[675430VME]

View attachment 71061
Can the stock valve controller be purchased separatly?

If I remember correctly the controller is shared with another manufacturer but I forgot which, let me ask.

 

[Tracked Emira]

Looking into this exhaust next. If anyone interested in my GRP titanium exhaust please send me a private message.
Has anyone installed this wrapped exhaust? What do you guys think about this product?

 

[Tracked Emira]

They also have headers and turbo parts.