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BMW Tuner and Sport Car Racing Team, TC Kline Racing Inc. is proud to introduce the Carbon Roadster, the first complete car offered by the company. The Carbon Roadster is a focused ultra high performance sports car based on the already excellent dynamics of the BMW Z4. TC Kline’s passionate adherence to the fundamental principals of light weight and dynamic performance has resulted is a true sports car.

The Carbon Roadster weights 2,680 lbs., has 346 hp and corners with 1.06G grip. Take a minute to soak that in. The CR weighs 150 lbs. less than a Honda S2000, has the HP of a Porsche 911, and has wider wheels and tires than a Ferrari F430. Incredibly, the CR weighs 700 lbs. less than a BMW M3 while maintaining the same power.

The Body; The entire skin of the CR is manufactured from Carbon Fiber Composites. The changes to the Z4 bodywork are a direct result of the application of the principals of "form follows function". Walk around the CR and you will not find any body lines which do not serve as an extension of function. The Carbon Roadster body work incorporates aerodynamic performance enhancements with a front air dam, front wheel house vents, side skirts, and rear diffusers. The body also has all four fenders flared I" to accommodate wider wheels and tires. The use of carbon composites to make the body reduces the weight of the CR tremendously while maintaining a strong durable skin.

Interior: TC Kline has contracted with Recaro to produce a one piece shell performance seat specifically for the CR upholstered in Alcantera and Leather. These light weight performance seats feature cutouts for a driver harness and will have exceptional support while maintaining excellent driver comfort. These Recaro/TC Kline seats are similar to those found in the E46 BMW M3 CSL or the Porsche Carrera GT.

The Drive Train: On the 25th of October, 2005, BMW AG introduced the Z4 M Roadster. The Z4 M Roadster incorporates the E46 M3 Drive train. The TC Kline CR is based on that car and shares its 3.2 liter motor, 6 Speed Transmission and M Lock Differential. TC Kline upgrades the drive train with an Aluminum flywheel for quicker throttle response, improved acceleration and lighter weight. TC Kline has also developed a thin wall stainless steel exhaust system for the CR. This exhaust system is significantly lighter than the stock system, improves horse power by 13 and has the outlet in the center of the rear bumper between the two Carbon Fiber Diffusers.

The Suspension: KONI Double Adjustable Coil-Over struts and rear shocks valved to TC Kline Specifications are already accepted by the BMW enthusiast as the standard for street and track performance and directly contribute to the 1.06G cornering grip the CR develops. The suspension springs for the CR are made in Germany from a light weight alloy steel and TC Kline has a variety of spring rates available which allow the owner to tune the CR to their personal taste. The CR front struts are topped off with TC Kline designed front Camber Plates for quicker turn-in and steering feel and Delrin bushings replace the standard rubber bushings in the front lower arms and rear trailing arms for quicker response and markedly improved feel. These TC Kline components significantly reduce the unsprung weight resulting in a more responsive suspension.

Brakes: Performance Friction Corp. has created extremely rigid and light weight aluminum MonoBloc calipers for use on the CR. The front caliper is a four piston design with four brake pads for superior modulation and high brake torque and the rear caliper is a two piston design sharing the same pads. The large floating rotors have aluminum hats for light weight. The front rotor diameter in 345 mm, and 328mm rotors are on the rear. The PFC Carbon Metallic Brake Pads offer exceptional brake loads for extremely short stopping distances. These ultra performance brakes also contribute significantly to reducing the unsprung weight of the Carbon Roadster.

Wheels and Tires: The final design for the wheels has not been determined, however, the specifications have. As on this prototype, all four wheels will be a one piece forged aluminum design for the lightest weight and strength. The CR standard front wheels are 19x9.5" and the rears are 19x10.5". Optional wheels in 18x9.5" and 18x10.5" will be available in forged aluminum as well for those drivers who want to take advantage of a larger selection of ‘R’ Compound tires and/or are interested in a more comfortable street ride. Magnesium forged wheels will be offered in 18x10" front, 18x11" rear for optimum track performance. The Michelin Pilot Sport Cup is currently the highest performance tire available for the street. The standard sizes for the CR are 265/30x19 front and 295/25x19 rear, (Not yet available). These Sport Cup tires produced 1.06 G cornering in a Car and Driver test driving a TC Kline Z4 using the same suspension as supplied on the CR. The Michelin PS2 Ultra high performance tire will be available in both 18 and 19" as a no charge option. The PS2 tires offer extended wear with less grip than the Sport Cup tires.

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With some detail changes, the CR prototype you see here will be offered for sale in the late spring or early summer of 2006. The TC Kline Carbon Roadster will be assembled in the TC Kline Racing Shop in Columbus, Ohio. The CR will be available in all of the BMW Z4 M Roadster colors, and any special color can be accommodated for a small extra charge. The CR will be limited by production capability to 100 cars. The final price of the Carbon Roadster is not set. However, expect the price to be in the mid $90,000. range.

There will be two option packages for the CR.

Soft ride package. This package will use the new self adjusting KONI FSD (frequency sensitive damping), technology dampers for a softer ride with minimal sacrifice in grip, softer spring rates, 18" wheels, Recaro Sport Seats and Michelin PS2 tires. This suspension will maintain the factory rubber bushings in the suspension. This is a no cost option.

Track Attack Package: This package offers 18x10" front, 18X11" rear forged Magnesium Wheels shod with 265/35x18 front and 295/30x18 rear Michelin Pilot Sport Cup Tires, Competition rate springs, PFC Slotted Rotors, High Temp. SRF Brake fluid, Recaro Racer SPG Driver Seat, Driver and passenger racing harnesses, and TC Kline Spherical Ball Joint Suspension. The cost for this option package has not been set at this date.

For further information you can go tcklineracing.com, or call TC Kline Racing at 614-771-7744.


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TC Kline Racing
"Uncompromising BMW Performance"
TC Kline Carbon Roadster

Specifications
Body: TC Kline Carbon Fiber Composite skin over steel unibody

Dimensions Length 161.5"
Width 70.1"
Height 50.2"
Wheel Base 98.3"

Track Front 60.2"
Rear 61.4"

Weight 2,680 lbs (unladen)

Interior: Recaro/TC Kline Custom light weight one piece shell seat w/ Alcantera and Leather upholstery
Optional – Recaro Sport Seats of Recaro Racer SPG Racing Seats

Engine
BMW 3.2 L inline Double overhead cam 6 Cylinder w/Iron Block and Aluminum Head - 346 hp @ 7900 rpm - 232 lb/ft torque at @4900 rpm

Exhaust: TC Kline Thin Wall Stainless w/center outlet

Flywheel : TC Kline 11.2 lbs Aluminum

Transmission: BMW 6 Speed Manual

Gear Ratios 1)4.35 2)2.496 3)1.665 4)1.23 5)1.00 6)0.851

Differential: BMW M Lock Limited Slip
Final Drive Ratio 3.62

Suspension: Front TC Kline/KONI Dbl Adj Struts
TC Kline light weight 60mm ID Coil Over Springs
TC Kline Adjustable Camber Plates
TC Kline Delrin Lower arm Bushings

Rear: Multi-Link Trailing Arm
TC Kline Dbl Adj Shocks

TC Kline Light Weight Coil Springs w/Adjustable Spring Lands
TC Kline Delrin Trailing Arm Bushings (Spherical Ball Joint or BMW Rubber Optional)

Brakes: Front
Performance Friction 4 piston MonoBloc Aluminum Calipers
345mm Floating rotor w/aluminum hats

Rear
Performance Friction 2 Piston Aluminum Calipers
328mm Floating rotor w/aluminum hats
PFC Carbon Metallic brake pads

Wheels and Tires
Light Weight One Piece Forged Aluminum w/Michelin Pilot Sport Cup Tires
Front – 19x9.5" wheel with 265/30x19" tire
Rear - 19x10.5 wheel with 295/25x19" tire (not yet available)

Optional
18x9.5 front and 18x10.5 rear Forged Aluminum
18x10 front and 18x11 rear Forged Magnesium
 

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Discussion Starter #3
20vvillian said:
I feel nothing, strange.
It's not my favorite looking car, but the performance is impressive. But a TC Kline Carbon Coupe would really get my heart beating... :Yikes:
 

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Man, I think this is the best looking post-Bengal BMW I have seen yet. I am very impressed.
 

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The wheels are a little excessive. And 1.06G on R compounds is really pathetic. But I really the the shape and the idea.
 

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what a surprise, no price tag
 

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Nice, always good to shave 700LBS without losing the looks of the car, that's the achivement in this project :thumbup:
 

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I like the strong emphasis on reducing weight and the suspension details. It's not like most tuners who throw in more hp, larger wheels, and call it a day. I think it's especially nice they're using the koni double adjustable shocks (can adjust dampening & rebound rates separately), and allowing the customer to choose different spring rates. For all the work they put into it, I think the price is reasonable.

The only small complaint i have, is maybe that they work on the coupe instead of the covertible (sp?). A carbon hardtop would have also been great imo.

1.06g's is really not too bad. I sort of think of the michelin cups as comparable to the Advan Neovas, ra-1, or the a035r hard compunds. Sort of between say an s-03, and the v710. The considerably lighter elise throws a similar skidpad figure, and it runs the neovas. also keep in mind it was just a random test. under different conditions it may perform differently.
 

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um... I'd prefer if they didn't paint mine.
 

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ronaldmcdonald said:
1.06g's is really not too bad. I sort of think of the michelin cups as comparable to the Advan Neovas, ra-1, or the a035r hard compunds. Sort of between say an s-03, and the v710. The considerably lighter elise throws a similar skidpad figure, and it runs the neovas. also keep in mind it was just a random test. under different conditions it may perform differently.

Meh. I'm pretty sure they'd optimize the test to their benefit. #1, they have twice the amount of tire as an Elise. And Pilot Sport Cups should be pretty close to V710s at temperature...I'd expect something like 1.3G really. But as a warning, they grip like shit when they're cold...as I experienced in my instructor's car when he took me for a brisk 1st lap @ NHIS. :Yikes:
 

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Looks way better than the original Z4... but why hide the CF??? If I were loaded, I'd keep it exposed. Granted, it'd have to be layed more carefully, but I'd (theoretically) plop down an extra $10K on that. :rolleyes:


The Elise pulls 1.06g on Advan A048's... basically a race tire. Not knocking the Elise, seeing as how it only runs 205/225 tires. LITEW8, baby, lightweight.


Slap some 265/295 (not yet available... you have to be joking!!!) on a Lisa and you'll pull a tendon, maybe even a couple muscles, not to mention some impressive skidpad numbers. Also, remember this... it's not about how well a car grips to the road, but how easy it is to handle when it isn't. But the Elise is a pretty finicky car when the rear lets loose, so, that's not really an argument for the Lotus. More like a generalization. And tire choice makes all the difference, anyway.
 

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RAH said:
Nice, always good to shave 700LBS without losing the looks of the car, that's the achivement in this project :thumbup:
not if you're starting with something that's already 1000 lbs too heavy (i just pulled that # out of my ass as an example)
 

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Discussion Starter #15
Medrosje said:
not if you're starting with something that's already 1000 lbs too heavy (i just pulled that # out of my ass as an example)
The stock z4 was never a very heavy car. It feels just a tad heavier than a Boxster.
If you want overweight, look at an SLK.

Now the Hartage Z4-M5 is way too heavy...



... especially up front. :O
 

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The Z4 drives a lot more neutral at the limit than an e46 m3. It does not feel like a heavy car at all...it drives a lot like an e36 m3.
 

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The Blue Blur said:
um... I'd prefer if they didn't paint mine.
I was with you at first, but a cf body straight up has to look a bit tacky... hmm, come to think about it, maybe it'll look like a stealth bomber...sexy.

-alex
 

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AlexDrivesAPassat said:
I was with you at first, but a cf body straight up has to look a bit tacky... hmm, come to think about it, maybe it'll look like a stealth bomber...sexy.

-alex
I was actually thinking carbon/ dark red kevlar weave...then go to SEMA. You don't buy a sports car to blend in. (to me)They are inherently flashy by design, sound and purpose.
 
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