lucasxdiniz
Active member
For the short term (read until I feed the piggy bank), I did two 'significant' mods, changed the springs to Eibachs for better fitment and looks and modified the exhaust.
The stock suspension is pretty good, which genuinely surprised me. Since I had driven a friend's Z4M with Eibach springs and was impressed with the ride quality, I went for a set and can't say there are any drawbacks compared to the OE springs.
How the car looks lowered. Bad photo to show that, but the only one I have.
Got the geo set up with the E46 CSL specs. This worked really well for the open diff Z4s and even for my 3.0si with Wavetrac, but my first impression (in a rather wet day) is that it needs a bit more positive toe in the rear to make it more balanced (Z4M LSD is considerably more aggressive than the torsen types IMO). Having said that, I like how it is, rotation is great and I can manage the over eager rear end with a bit of right foot modulation in the wet weather (TC is only on if I forget to turn it off), and generally not afraid of the snappy chassis of the Z4s, very used to it by now.
Now, the exhaust... A bit of afuck up happy accident on my part. Decided to go for the usual backbox mod, which had worked wonderfully well in the 3.0si and 6er. Problem is, doing the same to the Z4M resulted in a muuuuch louder set up. When I first put it on, I felt pretty frustrated with myself as I couldn't justify spending another few £100s to get it re-done in a different way, so I sucked it up and went for a test drive after I let the idle drop inside a fully closed garage as cold start was beyond obnoxious... I ended up loving it in the end, especially now that is has matured and is less loud (cold starts are still an issue). I can potter around under 3k and not draw attention to myself in villages, so it's not too bad. But oh my does she scream above 3k!!! Usual boominess when under load and low revs, but no worse than I remember my 3.0si being.
Before, after, and the mod itself.
Videos never do exhaust sound justice, but there's a clip below. I can only describe it as sounding like a vintage race car. Very raw and old school sound.
[youtube]Aa6dUp9v3f0[/youtube]
The stock suspension is pretty good, which genuinely surprised me. Since I had driven a friend's Z4M with Eibach springs and was impressed with the ride quality, I went for a set and can't say there are any drawbacks compared to the OE springs.
How the car looks lowered. Bad photo to show that, but the only one I have.
Got the geo set up with the E46 CSL specs. This worked really well for the open diff Z4s and even for my 3.0si with Wavetrac, but my first impression (in a rather wet day) is that it needs a bit more positive toe in the rear to make it more balanced (Z4M LSD is considerably more aggressive than the torsen types IMO). Having said that, I like how it is, rotation is great and I can manage the over eager rear end with a bit of right foot modulation in the wet weather (TC is only on if I forget to turn it off), and generally not afraid of the snappy chassis of the Z4s, very used to it by now.
Now, the exhaust... A bit of a
Before, after, and the mod itself.
Videos never do exhaust sound justice, but there's a clip below. I can only describe it as sounding like a vintage race car. Very raw and old school sound.
[youtube]Aa6dUp9v3f0[/youtube]
Approved 
