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CN9A 1996 Evolution IV

 
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PostPosted: Tue Nov 20, 2007 10:57 am    Post subject: CN9A 1996 Evolution IV Reply with quote

Evolution IV was big change to previous Evolutions being based on an entriely new chassis and while the 4G63 power plant was retained, it underwent extensive modifications. In addition to the use of a high-speed cam profile and lighter pistons, Evolution IV reduced turbo lag by minimizing gas flow interference in the exhaust manifold. The introduction of a twin-scroll turbocharger improved turbo charging performance, generating more torque in the low and medium range. Evolution IV also featured a straighter intake manifold, and a metal head gasket that withstood the higher compression ratio and boost pressures better. The introduction of a secondary air induction system improved turbo on-off response by feeding pressurized air above the turbine and reducing negative pressure, thereby keeping turbine speed from dropping under deceleration. All this new technology realized a substantial increase in engine performance, pushing maximum power output up to 280bhp at 6500rpm and maximum torque to 260lbs/ft at 3000rpm.

In addition to the standard close-ratio 5-speed manual transmission, Evolution IV was offered with a super-close-ratio gearbox in RS trim. And a choice of high or low final drive gears made Evolution IV easier to tune for competitive use.

The RS model, developed primarily as a base vehicle for competition use, was offered with a torque-adaptive helical gear limited slip front differential - a world first on a 4WD model. And on the GSR the rear differential incorporated another world first: Active Yaw Control.

Generating a stabilizing yaw moment by creating a torque differential in the rear wheels, AYC realized a significant improvement in cornering performance and in vehicle stability under hard braking.

Evolution IV saw a shift towards more on-road testing during development, enabling it to evolve into a machine capable of showing the opposition just as clean pair of heels on the circular track as in rallies.

Start of Production: August 1996
Number Produced: 9000
Length [mm]: 4330
Height [mm]: 1415
Width [mm]: 1690
GSR Weight [kg]: 1350
RS Weight [kg]: 1260
Chassis Code: CN9A
Engine Size: 1997.5
Bore and stroke: 85.0 x 88.0
Compression Ratio: 8.8:1
Power [bhp]: 276
Torque [lb/ft]: 260
Injector Size [cc]: 510
0-60mph: 4.8 secs
0-100mph: 12.9 secs
Top Speed [mph]: 150
Fuel Consumption: 23
Fuel Tank capacity: 48 Litres
Transmission: 5 Speed manual
Active Yaw Control [AYC]: Yes
Active Center Dif [ACD]: No
Gear Ratio 1st [GSR/RS]: 2.750/2.750
Gear Ratio 2nd [GSR/RS]: 1.950/1.950
Gear Ratio 3rd [GSR/RS]: 1.407/1.407
Gear Ratio 4th [GSR/RS]: 1.031/1.031
Gear Ratio 5th [GSR/RS]: 0.761/0.761
Gear Ratio Rev [GSR/RS]: 3.416/3.416
Gear Ratio Final [GSR/RS]: 4.529/4.529



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Antti22



Joined: 09 Dec 2007
Posts: 378

PostPosted: Sun Mar 23, 2008 1:22 pm    Post subject: Reply with quote

Kas IV -l olid juba algselt suured pidurid?
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Rain
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PostPosted: Sun Mar 23, 2008 1:26 pm    Post subject: Reply with quote

Antti22 wrote:
Kas IV -l olid juba algselt suured pidurid?

Neli oli veel väikeste piduritega. Suured pidurid tulid alates 5'st
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