Lofty specific outputs aren't just for bragging or quickly blowing off. In fact, the higher the specific output, the better the engine's potential fuel efficiency. The more efficiently an engine can transfer stored energy (fuel) into kinetic energy (motion), the better its chances for improved fuel economy. Good fuel efficiency doesn't always spell good fuel economy, however, as factors like aerodynamics and weight figure into the equation. But we digress.
The obvious way to increase specific output is through forced induction. Nitrous oxide, superchargers and turbochargers all increase the horsepower-per-liter ratio in their own way. Bumping up compression ratios by adding domed pistons and decreasing combustion chamber volumes also raises specific output. Boring and stroking may also alter specific output, but not necessarily in the planned direction. Adding or subtracting displacement, proportionally less than the amount of power gained, will decrease specific output.
Bolts&WashersKeith Chau's 2000 Honda S2000PropulsionAt the heart of Chau's S2000 is a fairly stock F20C1. Engine internals remain untouched, while intake and exhaust systems receive due attention with a J's Racing Tsuchinoko carbon-fiber intake system and HKS Hiper dual exhaust. The Tsuchinoko chamber introduces fresher, cooler air from the lower bumper area while the HKS exhaust teams with the OEM catalytic converter and exhaust manifold.
An assortment of Mugen items spruce up the engine bay, including an oil and radiator cap. To promote radiator efficiency, a Silkroad carbon-fiber radiator cooling panel is attached.
RIMS & RubberAfter waiting months for a set of rims he'd set his heart on, Chau cancelled the order for a set of Volk GT-7s. While the Volks took five months to arrive, they showed up just hours before a car show competition. Rubber of choice for the 18s is Yokohama ES100, sized 225/40-18 up front, 255/35-18 in the rear.
StanceSuspension mods remain minimal with TEIN CS coil-overs at the corners and a J's Racing front upper strut brace under the hood.
ResistanceStock.FashionOutside: Chau was adamant about keeping the OEM Spa yellow paint and had his body add-ons color-matched to suit. Up front lies a J's Racing front half spoiler with Air Walker side skirts beneath the doors (he credits Allen and Mel at Tees USA for scoring). A J's Racing carbon-fiber hood and twin carbon-fiber canards round out the body mods.
Inside: Like the rest of the car, the interior continues a careful balance of OEM and aftermarket. A pair of Bride Exas III seats team with Takata four-point harnesses for a flawless integration.
I.C.E.I.C.E is stock for now, but it's next on Chau's agenda.