Below is what the V8Roadster sleeve as included in their kit looks like. It is marginally smaller than the distance between the face of the bushings when the bushings are installed. This would cause the clevis, when tightened, to use the face of the bushing as the mount rather than locating on the sleeve. This was turning the bushing into the mounting surface instead of the medium to quell NVH.

I contacted Sean from SadFab to have a custom made sleeve made. He has helped me out in the past with 3d printed parts and custom machined parts. Needless to say, this small difference in sleeve diameter seems to have made a difference when the sleeve was assembled. Below is the side by side of the included sleeve on the left and Sean's sleeve on the right.



This is what the motor mount looks like when the stock sleeve is pressed into the bushings.







Here is a photo of Sean's new sleeve in the v8roadster clevis. It is a pretty precise and tight fit.




Below is what the mount looks like with Sean's sleeves installed.






And here is a quick video I made showing that the motor mounts can now rotate freely without clamping on the bushings themselves.

 

As an aside, Sean from SadFab said that he will make these sleeves for other people that need them too. Just reach out to him and work out the details with him.

 

How do they feel now?

 

Hard hitting questions right here

 

Question hit too hard. I am half way deep into a different project and my miata is still in the air. Hopefully within the next few weeks I will be able to give some input on how it feels.

 

This is for the LFX motor mounts?

 

BP in this case, but on a general level having the correct sleeve length is something that should apply to any mount of this style. Clamping hard on the bushing itself keeps the bushing from being able to do what it is supposed to do: absorb vibrations.

 

FTFY

 

Bush just wants to do the bush things. Let the bush do.