With low-down torque and response on his mind, Cam Herbert only saw one direction to head in when building an RB30 for his R32 — running twins. “I’ve always loved [Skyline] GT-Rs, particularly for the twin-turbo set-up. The sound of two turbos, two wastegates, and two exhausts is a thrill,” he said.
“When I started the build, it was just a bare RB30E block and series two RB25DET head, which I wanted to make as torquey as possible low down in the rev range, so, naturally, using two small turbos was the way to go.”
Two and a bit years on, and Cam tells us that things have escalated beyond those initial thoughts. The package now makes use of a R34 GReddy individual-throttle-body (ITB) system with two steel-wheeled R34 N1 Garrett turbos sitting atop a custom twin-turbo exhaust manifold fabricated by fellow Bridge City Collective member Adrian Williamson.
Outside of the bay, Cam has lopped off the old tube-front, ready to be remade by Joel Paterson, with the remake set to replicate that found on the VID D1NZ Skylines. And, as the chassis is that of a dedicated drift car, it currently uses A32 tie rods with cut-and-shut knuckles for added lock. But these will be replaced by modified J-arms in the interim, before switching out for GKTech knuckles and castor arms for some serious lock and to keep things in D1 rules.
The cage and seat/harness set-up will follow the same route, keeping the door open for future competition use. When that time comes, Cam tells us that the otherwise unopened motor will be rebuilt with forged internals and to chase a touch more power.