Fitting M wishbone bushes to a non M
- Thread starter G600
- Start date
I'm also considering this as it seems an obvious way to improve the straight line stability on a road car. Simple and relatively cheap.
Is there no-one who has boldly gone before ?
Is there no-one who has boldly gone before ?
Done it and I noticed a slight increase in force required for turn in.
Many thanks both. That will be next on the list of things to do then. New bushes, dampers, springs (all stock), tyres, pinless camber and 2 alignments already done.
I fitted them on my previous E85 3.0 and what you need to be aware of is that they physically move your front wheels more forward in the wheel arch by 5-10mm, so if you have wider or higher profile tyres there may start to rub. I had winter tyres of 225/40/19 on the front and they just about fitted but rubbed slightly on full lock.
Does anyone know if the z4m wheel arches are a slightly different shape to the standard z4? As the M runs larger 225/45/18 tyres up front, I’m wondering why they don’t run with m bushings? Perhaps the extra forward positioning of the bushings and increased castor is dealt with via different shaped plastic wheel arch covers, or perhaps more likely via the hub geometry?
srhutch said:
So the geometry difference must be dealt with perhaps in the steering knuckle? If I recall correctly the top mount in the body shell is the same in M and non-M, so perhaps the hub position is slightly further back in the knuckle on the M to cater for the 10-15mm forward movement in the wishbone?
Sure I’m overthinking this but interesting to know. I’m running 225/45/18 square set up so the M bushing would almost certainly rub, but the idea of increased castor and it’s positive effect on steering is of interest. Perhaps I just need to go camber/castor top plates......
