Aerie Ti Emira exhaust installation

[lynchy73]

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.

Had a look at the standard exhaust valve. The valve is offset 45deg, the open and closed position of the valve are shown the images, there is a 90deg range of motion.

The Aerie exhaust doesn’t have this 45deg offset. The couplings are either straight, 0deg or 90deg.

How is the meant to work in the same way, same range of motion exactly? Am I missing something here, or is this just plain wrong?

 

[crashprash]

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.

The spring design that you have is what was on the Aerie v6 Ti v1 version. Guessing they change the spring design due to complaints of rattling valves for v2

 

[lynchy73]

The spring design that you have is what was on the Aerie v6 Ti v1 version. Guessing they change the spring design due to complaints of rattling valves for v2

yeah, but not sure how the new spring fixes it. It might stop the valve rattling when the valve is supposed to be closed, but does it then fully open? The range of motion of the valve is 90 degs and the v2 spring is 90deg rotated, ref the v1 spring. I mean V1 and V2 design has a different valve design, or it’s just a different spring?

Need to get my exhaust off and get a better look at the new exhaust, but it seems to me like an offset of 45 degs is required to match the OEM motor positions for full open and full closed.

 

[crashprash]

yeah, but not sure how the new spring fixes it. It might stop the valve rattling when the valve is supposed to be closed, but does it then fully open? The range of motion of the valve is 90 degs and the v2 spring is 90deg rotated, ref the v1 spring. I mean V1 and V2 design has a different valve design, or it’s just a different spring?

Need to get my exhaust off and get a better look at the new exhaust, but it seems to me like an offset of 45 degs is required to match the OEM motor positions for full open and full closed.

Need to check what offset and range of motion the OEM v6 exhaust has

 

[lynchy73]

Need to check what offset and range of motion the OEM v6 exhaust has

I did, that’s why I’ve got these comments. See these images showing the open/closed positions and see the orientation of the valve motor…. The slot in the shaft on the valve side is aligned with the motor btw, there is no coupling as such on the OEM motor to valve connection.

 

[lynchy73]

Need to check what offset and range of motion the OEM v6 exhaust has

Pretty sure the arrangement of the valve is same on the V6 exhaust, as the I4, the valve motor is the same afaik.