Project Phantom Streamline

1999 Nissan Silvia S15

R299

Media library

6 photos

Media Studies

6 images

Comparison Study I ↗

Comparison Study II ↗

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Story

Project Phantom Streamline treats the S15 silhouette like a homologation sketch that escaped into an unlimited rulebook. The stock proportions are still readable—headlights, greenhouse, roofline—but everything underneath is re-scaled to prototype math: 2100mm track, squared-off arches, and sidepod cooling that makes the doors look like fairings rather than bodywork.

It’s a believable alternate motorsport program built around downforce first, temperature control second, and nostalgia last. Exposed ducts, a vented carbon hood spine feeding a roof intake, and a long rear diffuser turn the car into a ground-effect device that happens to wear Silvia skin, finished in deep emerald over sapphire to keep it feeling like a factory-backed effort instead of a cosplay.

Blueprint

The Whitepaper Room

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Collectible Poster

Collector's Edition

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Technical dossier

Fictional engineering concept

Platform

1999 Nissan Silvia S15

Powertrain concept

RB25DET relocated rearward for a front-mid layout and improved polar moment
Twin side-mounted radiators and dual intercooler core arrangement fed by sidepods
Side-exit exhaust ahead of the rear wheels with heat-managed routing
Track-focused calibration prioritizing sustained load, charge temps, and oil control

Aero package

120mm forward front splitter with twin dive planes and high-pressure brake ducting
Sealed, channeled side skirts to maintain floor pressure differential
350mm extended rear diffuser with six strakes for stable expansion and yaw control
Triple-element rear wing (1700mm span) on tall uprights with adjustable gurneys

Chassis & stance

1999 Nissan Silvia S15

Wheels & tires

OZ Racing Formula HLT forged: 18x12 ET+5 front, 18x13 ET+7 rear
Michelin slicks: 325/40ZR18 front, 355/35ZR18 rear
Race brake package with dedicated ducting recessed behind the front arches
Static arch clearance set tight (10mm) to match stiff spring rates and aero load

Fabrication notes

Carbon composite multi-radius arch construction with reinforced mounting flanges for quick-change service
Floor and diffuser built as a matched assembly with attention to sealing and ride-height sensitivity
Ducting designed with removable panels for brake and cooling access between sessions
Rear structure reinforced to carry tall wing loads into the chassis, not the skin