A Look Inside Tanner Foust’s Rockstar Scion Formula D Drift Machine

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 A Look Inside Tanner Foust's Rockstar Scion Formula D Drift Machine
 The rear brakes use six piston Wilwood calipers, one set is the normal brake, the second set is a lever controlled turning brake.  Scalloped Sprint Car rotors on alloy hats save unsprung weight.

Drift car brakes are very specific and brake balance adjustability is very important. A Tilton 600 pedal assembly with Tilton hydraulic cylinders controls the brakes and clutch. A Tilton balance bar controls the brake bias. Wilwood 6 piston calipers grab scalloped lightweight Sprint Car rotors with the rear brakes sporting dual calipers, the second calipers are turning brakes that have their own independent hydraulic systems and are operated by the driver pulling a lever.

 A Look Inside Tanner Foust's Rockstar Scion Formula D Drift Machine
 The front brakes use six piston Wilwood calipers, alloy hats and scalloped Sprint Car rotors.

The front suspension uses Tokico adjustable dampers in custom coilover housings and custom fabricated lower control arms with spherical bearings for full adjustability of camber and caster. The stock Scion spindles are modified for more steering angle and Ackerman. The steering system uses a Subaru STI rack modified to switch from rear steer to front steer with a KRC pump and a custom fabricated steering column topped with a quick release Sparco steering wheel. A custom mounted adjustable Speedway Engineering swaybar is used. The rear suspension is strictly stock Scion TC via the agreed upon Formula D rules compromise. Special Tokico adjustable coilover dampers are used with a Speedway engineering adjustable rear sway bar.

 A Look Inside Tanner Foust's Rockstar Scion Formula D Drift Machine
 A Tilton pedal assembly uses separate master cylinders for the front and rear brakes controlled by a balance bar to control proportioning.  Drift cars need highly adjustable proportioning.

Strong and lightweight forged Motegi Tracklite wheels are used. The fronts are 17×8 shod with sticky Hankook R-S3 tires in 225/45-17. The rear wheels are 18×10 numbers with some 285/35-18 R-S3’s. The wheels have quite a bit of offset to push the front and rear track width outward for greater stability.

 A Look Inside Tanner Foust's Rockstar Scion Formula D Drift Machine
 The front suspension uses adjustable Tokico dampers in custom coilover housings.

 

A Look Inside Tanner Foust's Rockstar Scion Formula D Drift Machine
The steering was converted from the factory rear to front steer.  It was done to clear the oil pan but front steer also tends to turn in better.  The Speedway engineering front bar is mounted high in the upper part of the picture.
A Look Inside Tanner Foust's Rockstar Scion Formula D Drift Machine
The rear suspension uses Tokico adjustable damping coilovers in custom housings.  The rear swaybar is a Speedway Engineering race car part that is highly adjustable.

 

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