[TRD-Power]

Air Intake
The Lancer Evolution sedan is equipped with a cold air induction system that draws ambient air from the leading edge of the aluminum hood into a thermoplastic box containing a low-restriction filter element. The positioning of the air cleaner assembly required that the battery be repositioned to streamline the intake ducting. The turbocharger draws air from the air filter cleaner assembly and compresses the air, making it denser. It is then forced into the engine’s combustion chambers. The compression of air causes it to heat and reduce the air charge’s temperature. Air-tight ducting transports the intake air through a large capacity, highly efficient air-to-air intercooler with a fin and tube design which has been optimized to lower air temperature without a significant pressure drop.
Further aiding the intercooler’s temperature-lowering capability is a water spraying system that can operate in manual or automatic modes. Manual water spraying projects a cold water spray over the finned, aluminum surface for as long as the center console located button is pressed. Automatic mode delivers two-seconds spray of cold water every five seconds. The compressed air, with its temperature significantly reduced, flows from the intercooler to the cast aluminum intake manifold via gently-contoured, large diameter aluminum pipes. The intercooler, with its capability for reducing air temperature, improves engine efficiency by helping provide denser, cooler air that helps reduce the possibility of detonation at high boost levels.

Exhaust system
The Lancer Evolution sedan is equipped with a large diameter, low restriction, stainless steel exhaust system. A large diameter exhaust down pipe flows into a single high-performance catalytic converter through gently bending 60.5 mm tubing. The exhaust system’s main muffler includes a back pressure valve that reduces exhaust noise at lower speeds while opening to increase flow and reduce backpressure at higher speeds. In addition, the exhaust system uses sound absorbing pre-mufflers to improve exhaust while reducing high frequency noises. The exhaust system terminates in an attractive large diameter (4-inch) single, round tailpipe that is chrome plated and angle-cut for improved appearance.

No.
Exhaust System Detail

Description

1
Front pipe spherical connector
This spherical pipe connector eliminates an inefficient flexible steel mesh tube and improves performance by reducing back pressure.
2
Main muffler
The high flow main muffler includes a variable back pressure valve to reduce low speed noise and reduce high speed exhaust flow back pressure.
3
Large diameter exhaust tubing
Large diameter 60.5 mm stainless steel tubing helps reduce back pressure.
4
Pre-silencers
A pair of pre-mufflers helps improve the exhaust note by removing high frequency tones.
5
Large single tailpipe
A large 101.6 mm chrome-covered, angle-cut exhaust tip adds a sporty look.

Manual Transmission
The Lancer Evolution sedan is equipped with a rugged five-speed transmission well-suited for duty behind the vehicle’s high-output, four-cylinder engine. The transmission’s internal gears and shifting mechanism are reinforced to handle the engine’s increased torque production. The Lancer Evolution sedan’s W5M51 transmission is equipped with triple syncros on the first two gears, a double syncro on the third gear, and single syncros on the fourth and fifth gears. The additional syncros improve engagement and shifter feel during high–speed shifts, and help prolong gear durability. In addition, high-strength, surface treated materials are used for the construction of each of the angle-cut gears to help this assembly withstand the stresses encountered during sports driving. The Lancer Evolution sedan uses an increased capacity 240 mm clutch disc (versus 215 mm unit in the base Lancer) that engages a lightweight flywheel’s surface with the help of an upgraded pressure plate and a synthetic fiber clutch disc friction surface.An automatic transmission will not be available for the Lancer Evolution sedan.
The transmission’s closely-spaced gear ratios are optimized to help maintain engine speed between shifts, and keep the engine revving in the most effective portion of its powerband. A numerically high 4.529 to one final drive ratio also helps improve the vehicle acceleration, and combined with the closely-spaced transmission ratios, helps maintain engine revolutions in the fatter end of the powerband, and helps launch the car out of corners.