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Grüne Hölle Junkie
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Very nice ride you got there!:drool:

I'm sooo jealous that you got to go to ESS' shop. I wish I could have been able to make arrangements to get up there so they could have installed my TS2+...

Keep us posted, and post up some more of those beautiful pics when you get your car back.:thumbsup:
 

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Excellent story and write-up! Your car is beautiful, and if I had a Z4, I would want the exterior to look identical! The new-style Alpina wheels, the Alpina front lip that not-so-subtly proclaims your car to be among the most elite of roadsters, the beefy quad-exhaust that surely sounds like the war between Heaven and Hell is shooting out your exhaust pipes, and the aggressive (but probably fairly comfortably-riding) look of the suspension; they all come together to make the car straddle "the line" between "sleeper" and "exotic roadster" more and better than any other car. For fanatics who know what it is, it's drool-worthy and would be just as neck-snapping as a Ferrari passing by. To a regular person, however, it's just a nice looking Z4, maybe to be confused with an M Roadster.

I'll bet that thing has got some torque already, along with an engine that loves to scream all the way to redline. Bored/stroked to 3.35L must really change the engine characteristics. Typically it's done to give more low-end grunt, but looking at a dyno chart for the same model as yours (not the same mods, obviously), it also made it into quite a screamer. Your car is a perfect example of the kind of engine best-suited for ESS's Twin-Screw superchargers; you already have a great power/torque-curve, it doesn't seem to be extremely high compression so boost can be safely used, and the wide-wheels, limited-slip differential, big-brake kit, and suspension modifications mean that your car already has a perfect chassis for adding more power. Seeing as the twin-screw reaches full-boost around, what, 2000rpm(?), your car will find that it will have gargantuan amounts of torque available at less-than-cruising RPM's, and that it will continue on even past your "stock" peak-power point. In fact, the supercharger should mean that you will experience a continual increase in power, all the way to redline, even past the 6800rpm "power peak". You should have peak-power at whatever your new redline is. If you're making 300hp now, you can probably expect 420-450hp EASY from an ESS kit; and that would be like having 500-530hp from a centrifugal supercharger since you have full-boost all the time and are making MUCH more low-end power.

Good luck with the project. It's straight up BAD ASZ!!
 

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Discussion Starter #24 (Edited)
and the aggressive (but probably fairly comfortably-riding) look of the suspension
The suspension is actually much more comfortable than the stock suspension. I specifically asked for a setup that would be compliant with imperfect road conditions because that is the type of roads where I experience most of the driving thrills. The shock absorbers were made and setup by a company called Reiger Suspension, located just 15km from where I live. It's a no-nonsense company and only supplies to motor sport teams where performance, durability and flexibility are the things that count. Well known clients are the Ford WRC, Suzuki WRC and BMW X-Raid teams. Reiger also supply many privateers in different disciplines from rally-raid trucks down to Group N rally cars, quads and moto cross.

I have been driving on many challenging roads in the Alps, the Eiffel (the area that surrounds the Nurburgring), the 'Ring itself ofcourse and Autobahns (that have greatly varying road conditions) and so far I have been very happy with the setup.

Photos:







The brakes were a story by itself. First we tried a 4-piston 342mm set but it was impossible to fit the Alpina wheels (the wheels would stick out of the fenders). I absolutely wanted to keep the Alpina look and without the Alpina Dynamic wheels that would be unsuccesful. At the end we had to send a wheel to the factory so Mov'it could make accurate measurements. By using 380mm discs (with the caliper further away from the heart of the wheel) they were able to make the brakes fit with minimal clearance between the wheel spokes and caliper. Top job by Mov'it and Dutch importer Dick Hoekendijk.



 

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Very cool thread man. I was captivated the whole time!
 

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Subscribed. Great pictures and story. Good luck and keep us updated please.
 

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nice thread love your car love what you are doing with it
i would like to see more pics of the car as well some pics from autobahn:D :thumbsup:
 

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Discussion Starter #40
The hardware is done and Asbjorn is working on fine tuning the software. It develops around 370HP at the wheels @ 7 PSI boost up from 270RWHP. That equals to ~435HP at the crank with a 15 percent correction factor for drivetrain losses :str8pimpi .

I will be shooting a video of the car in the Norway.
 
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