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      01-11-2011, 06:41 PM   #1
Geoffjr@isringhausen
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EVO's AC Schnitzer ACS4 Turbo S Review

Saw this EVO article about EVO's AC Schnitzer ACS4 Turbo S review... Really good write up.

Source: http://www.evo.co.uk/carreviews/evoc..._s_review.html

Quote:
AC Schnitzer ACS4 Turbo S review

Rating:

Tuner creates best-handling BMW Z4 yet, power up to 375bhp, styling tweaks bring attitude to match

Have you ever seen a better-looking Z4? Me neither. The combination of lowered suspension and dark alloys transforms the demeanour of BMW's roadster. It would look even cooler without the stickers, but this is AC Schnitzer's demonstrator, and besides, there's a suitably serious uplift in power to back up the appearance. Mind, as this is based on the new 335bhp Z4 sDrive 35is, it wasn't exactly short of grunt in the first place.

As a demo car, this Z4 is fitted with just about everything in the catalogue. Body-wise, there's a curvy carbonfibre splitter and, above that, an Aston-style set of aluminium spars; on the flanks there are new wing panels with SLR-like chrome strakes, and at the rear a pair of neat boot-lip winglets and a reworked valance.

Mechanically, the suspension is lowered by an inch and fitted with stiffer, rising-rate coil springs, a fatter rear anti-roll bar and re-tuned dampers. Those new, airy 19in forged rims help, too, minimising unsprung weight. The tyres are Conti Force Contacts - Continental's first trackday tyre - and then there's Schnitzer's brake kit, with bigger discs front and rear and six- and four-pot calipers respectively.

The power of the twin-turbo straight-six is lifted to a mind-focusing 375bhp thanks solely to reworked engine electronics, while replacement exhaust back-boxes give the motor a louder, more appealing voice. And it doesn't take long to appreciate that every last one of the claimed horses is there; the swell of torque in the mid-range is now mighty.

Better still, there's a much more connected feel about the chassis, both in the sense that the car's front and rear now work as a whole and that you can feel what's going on at each corner. This is the first Z4 we've driven that feels fully exploitable. Yes, it's a firm set-up, but the ride has hardly deteriorated compared with the stock car on its run-flat tyres.

There's a more consistent weight and more realistic feel through the steering, and there's no shortage of grip, either. In fact, there's almost too much - those Contis hang on and on, so the engine is straining on full boost when the torque does overcome the traction. As soon as that happens with stability off, the boost is released and the rear tyres spin up even faster, snapping the car sideways. There's great pleasure to be had in simply working within the ACS4's considerable limits, though. There's a clarity and focus to its dynamics, and you can feel the rear digging in and getting the torque onto the road. It's an engaging, rewarding drive.

The total conversion as seen here adds a substantial £24,767 to the cost of a £44,220 Z4 35iS, making it a near-£70K car, though everything is available individually. A "driver" pack, with the engine, suspension, brakes and wheels, would be £16,306. Still not cheap, but it turns the Z4 from a wannabe into a proper sports car, and a handsome one, too.
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      01-12-2011, 12:11 AM   #2
ttuner
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that looks terrible...
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      01-12-2011, 01:14 AM   #3
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I like ACS on the E93s... But sorry this look horrible indeed on the Z4....
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      01-12-2011, 08:52 AM   #4
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Not a fan of the AC frt fenders, especially since they merely integrated the ugly stock side signal light. I've always liked their front spoiler add on. Interesting that the Frt calipers are AC - I wonder if they also produce their own rears - their web site doesn't have much info? The wheels are nice looking too bad their 19". Prices outragous - but then it is a small market.
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      01-12-2011, 09:13 PM   #5
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I like lowered springs, but that is about it.
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      01-13-2011, 02:00 PM   #6
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Quote:
Originally Posted by ttuner View Post
that looks terrible...
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      01-13-2011, 02:04 PM   #7
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very cool. I like the wheels. The bodywork is not overdone either.
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      01-13-2011, 02:09 PM   #8
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      01-13-2011, 02:22 PM   #9
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ACS has looked terrible for quite some time
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      01-13-2011, 02:34 PM   #10
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Who the hell does the exterior design work for ACS?!

Maybe it's just me but I think 99.9% of their products look like toy cars you would buy from ToysRUS for your 3yr old son.
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      01-13-2011, 03:11 PM   #11
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The most impressive part from this tune is the price
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      01-13-2011, 03:58 PM   #12
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Quote:
Originally Posted by Geoffjr@isringhausen View Post
and then thereís Schnitzerís brake kit, with bigger discs front and rear and six- and four-pot calipers respectively.
How is this possible? I thought it couldn't be done with the electronic brake!
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      01-13-2011, 05:08 PM   #13
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Quote:
Originally Posted by bbkg79 View Post
How is this possible? I thought it couldn't be done with the electronic brake!
Electronic brake ?
Are you confusing with electronic differential ?
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      01-13-2011, 06:09 PM   #14
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Quote:
Originally Posted by hwelvaar View Post
Electronic brake ?
Are you confusing with electronic differential ?
Electronic E-Brake.

That car is way too busy looking. Pass.
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      01-13-2011, 07:38 PM   #15
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uhg... how does AC Schnitzer stay in business?
their designs are total crap.
they should be working on chevy cobalts and caviliers, not bmw's
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      01-14-2011, 12:57 PM   #16
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Wow... not stunning and really expensive. Is anyone really going to spring for this package?
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      01-14-2011, 01:46 PM   #17
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LOL at the lip spoiler.
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      01-14-2011, 02:13 PM   #18
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£25k! How many do they think/hope/plan/need to sell?!

If I had the cash I wouldn't do it. Exhaust and brakes maybe. Who thought it was a good idea to match the I Drive knob to the wheels?! Awful.
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      01-14-2011, 09:12 PM   #19
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Quote:
Originally Posted by AKFROMTHEUK View Post
£25k! How many do they think/hope/plan/need to sell?!

If I had the cash I wouldn't do it. Exhaust and brakes maybe. Who thought it was a good idea to match the I Drive knob to the wheels?! Awful.
OMG! i didn't see that!!
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      01-15-2011, 08:28 AM   #20
JoeyFiasco
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that spoiler.. nausea inducing.. must look away..
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      01-15-2011, 08:40 AM   #21
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Quote:
Originally Posted by AKFROMTHEUK View Post
£25k! How many do they think/hope/plan/need to sell?!

If I had the cash I wouldn't do it. Exhaust and brakes maybe. Who thought it was a good idea to match the I Drive knob to the wheels?! Awful.
Those looks so terrible. My eyes are infected
I really dont like ACS 's Aston-like grill.
Why do they keep making those?
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      01-15-2011, 09:30 AM   #22
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Quote:
Originally Posted by AKFROMTHEUK View Post
£25k! How many do they think/hope/plan/need to sell?!

If I had the cash I wouldn't do it. Exhaust and brakes maybe. Who thought it was a good idea to match the I Drive knob to the wheels?! Awful.
No, No and Thank you No...
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