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Inverting rear subframe mounts.


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I've read some of the archives and it seems to be a mixed bag as far whether this is worth doing, and whether it's actually a good idea for a street car.

I am running H&Rs with bottlecaps on 185/60s, so I think clearance will be fine, but the ride height is low enough that I think a camber adjustment would be good.

Since I am pulling the entire subframe for an R&R, it seems like now is the ideal time if I'm going to do this.

Anyone done this and wish they hadn't, or anyone with a similar setup feel it was worth it?

Thanks.

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I am a bit concererned about the diff alignment by doing this. Lee, did you use offset diff mounts?

If you want, you can grind the holes on the diff tabs. My car reaches 125Mph on long track stretches and I never felt any vibration. In my case I did not grind the holes.

Massivescript_specs.jpg

Brake harder. Go faster.

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  • 2 months later...

Is this as easy as putting the left on the right, and the right on the left? Just swap them so they flip up-side-down? That's not that bad of an idea.... How come it's not discussed (and performed) more on the forum?

I'm interested and this seems like something that could be done in about 30 minutes. I'm also interested in hearing the downsides....

'79 & '80 Vespas, R75/6 + R90/6 (and a Triumph), '76 IH Scout II

E36 

'71 VIN: 2574356 - Nevada, Sunroof, RUST and a really nice '76

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Is this as easy as putting the left on the right, and the right on the left? Just swap them so they flip up-side-down?

All you have to do is just flip them upside down and re-install.

When you lower the o2, the rear increases in camber and toe in. For a little bit it's ok, but in the long run it causes more tire wear and negates some of the handling improvement you gained from lowering in the first place. By flipping the subframe mounts, you raise the rear subframe to get it closer to the original geometry after lowering.

John

Fresh squeezed horseshoes and hand grenades

1665778

 

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Is this as easy as putting the left on the right, and the right on the left? Just swap them so they flip up-side-down?

All you have to do is just flip them upside down and re-install.

When you lower the o2, the rear increases in camber and toe in. For a little bit it's ok, but in the long run it causes more tire wear and negates some of the handling improvement you gained from lowering in the first place. By flipping the subframe mounts, you raise the rear subframe to get it closer to the original geometry after lowering.

John

So it's like raising the subframe up inside the car? similar to how one might relocate the attachment point for a control arm for example? Or how we put spacers between the pitman arm and the strut housing? If it's really that easy I think I'll give it a go and see what happens.....

'79 & '80 Vespas, R75/6 + R90/6 (and a Triumph), '76 IH Scout II

E36 

'71 VIN: 2574356 - Nevada, Sunroof, RUST and a really nice '76

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