>From the Tokoyo motor show press release
RENESIS, the key to the RX-8's front-midship layout,
features a side-intake, side-exhaust layout, with the
exhaust ports moved to the side housing of the rotor
chamber. This allows the size of the ports to be freely
set, resulting in an expanded air-intake port area _
30% larger than in conventional rotary engines _
greatly improving intake resistance and contributing to
the high maximum output targets of 184kW
(250PS)/8,500rpm and maximum torque of 216Nm
(22.0kg-m)/7,500rpm even with natural aspiration.
In addition, the adoption of dual exhaust ports for each
chamber achieves twice the port area of conventional
designs and also allows exhaust port timing to be
delayed for increased thermal efficiency in the
expansion process. Unburned hydrocarbons are
retained for combustion in the next cycle, which
greatly reduces emissions. A three-stage induction
system, featuring shutter valves at the intake ports of
each rotor, utilize the incoming air's dynamic charge
effect and improve filling efficiency, while twin
electronic throttles precisely and flexibly control the
valve operation. Furthermore, a wet-sump lubrication
system with oil-pan height just half that of
conventional designs also reduced engine size and
weight.
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