My Alpina Roadster S (supercharger conversion @ ESS)

[FemmeT]

Here are some new pictures where you see how the quad pipe exhaust is done.

The car is currently being prepared for a repaint in a dark grey Lamborghini colour. The Voltphreaks battery has been fitted and the car has been driven for the first time to check for issues with the suspension. Some adjustments have to be made to the front springs and the stabilizer links. I am still waiting for the seats to return from retrimming.

[inTgr8r]

Very impressive work.

[louis]

hmm, i was thinking of grigio avalon myself, would be real interesting to see how your car turns out first! do u know the paint code of the exact shade of grey you chose?

[DHK]

I love how it looks naked))) Picture 1 and 3 just amazing. Great job man!

[FemmeT]

hmm, i was thinking of grigio avalon myself, would be real interesting to see how your car turns out first! do u know the paint code of the exact shade of grey you chose?

My first choice was Grigio Proteus but it was not listed in the paint computer. We found another nice Lamborghini colour (don't know the name) so I decided to use that one. There's a high amount of metallic particles in it which should give a nice effect in the sun.

Grigio Proteus is used on the car below:

[cj10jeeper]

Femme,

I think this is coming of beautifully. I envy the facility you work out of and the engineering facilities you can bring together.

Can you tell me a little more about the exhaust system as quad pipes is on my mid term wish list? I confess ignorance of how a Z4M or Alpina system is set up for the 4 tail pipes, but your looks like a standard 2 pipe system with a branch running to the right side with a pair of chrome tips welded on. How functional is it Vs cosmetic?

[FemmeT]

A Z4-M has a muffler for each pair of tail pipes. The problem with a non Z4-M is that there is no space for a second muffler. You would have to relocate the battery compartment and trade in some trunk space.

The quad pipes are mainly there for cosmetics. Theoretically there could be a bit less resistance because of the 'third' tail pipe. Also some material inside the muffler has been removed to improve the sound.

My mechanic has tried several types of mufflers but they were all too loud. That's another reason why he decided to modify the Alpina muffler. I'm happy with this solution because I always loved the sound of the Alpina Roadster S.

The car should have +450hp after the ESS treatment. In my opinion it deserves quad pipes .

[cj10jeeper]

That all makes sense and I can see it as a route I could take. A reasonable compromise between a system that sounds right and looks the part, without having to rebuild half the underneath of the boot and battery areas and the extra exit may just reduce back pressure a little with all those horses being generated.

Thanks

[pvr]

Never seen a seatbelt in that location - is that the ISOFIX thingy?

[cj10jeeper]

Never seen a seatbelt in that location - is that the ISOFIX thingy?

I think the photos in pages 2 & then 3 show what's been done

[pvr]

ah ...

[czechT698]

Nice job! i really dig those rims and the diffuser! Very nice ride!

[z200]

femmet i send you a pm check it plz mate

[JohnZ4greece]

u r great....... i have a z4 20lit and i really jealous yor car.... really like your exhuast!!!

[FemmeT]

The workshop is in the final stage of finishing the car. Here are today's pics (still without Alpina front spoiler):