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I have fitted these mounts on my car (still on stands) http://www.racersedge-inc.com/racersedge/r...n&id=11.3.2

One thing that I find funny is that the holes are very much oval, as showed in pictures on the Racers Edge web site so there is not anything wrong my parts - this is how they are made. The OEM mounts are held in place with clamping force but they are also guided to the correct position via a "snug" fit. This is not the case with the RE mounts.

Is it ONLY the clamping force that holds them in place? I'm thinking that these mounts taking a lot of load (not at least judging by the size of the bearings) and that a little extra snugness should make their job easier, or at least prevent them from moving. The installation guide from RE doesn't say anything about this, am I missing something or is this simply a non issue?

it is indeed only the clamping force that holds those - they don't move though, if torqued to the correct spec

side note: the lower suspension brace also helps hold them in place

As I suspected then.

But I don't see how the lower brace (which I have) could assist in holding the mounts in place since the brace brackets are attached to the bolts and not directly to the mount. Perhaps an improved brace design would attach to the eccentric bolt rather than the bolts holding the mount and thus transfer the load directly to the opposite mount rather than the bolts holding the mount - food for thought.

it helps because it ties one side to the other, thereby adding the tension of the other 2 bolts to resist the side impact force on either of the wheels

attaching to the eccentrics would require an alignment upon installation of the brace, and would prohibit adjustment when installed - it also would not connect the frame extensions, which is the area of flex, as the bushing in the center would still move - it's not the control arms we are trying to reinforce, but rather the frame

it helps because it ties one side to the other, thereby adding the tension of the other 2 bolts to resist the side impact force on either of the wheels

attaching to the eccentrics would require an alignment upon installation of the brace, and would prohibit adjustment when installed - it also would not connect the frame extensions, which is the area of flex, as the bushing in the center would still move - it's not the control arms we are trying to reinforce, but rather the frame

I was primarily thinking of uniball style mounts - no flex there.

About adding the other bolts I see what you mean, the brace brackets are indeed a snug fit and should transfer load between both sides. But if the mount where to move because of poorly torqued bolts the bracket would do little to keep the mounts still.

Frame flex is what the brace cures but the reason for addressing the flex issue is to get the front end to stop moving about.