2008 Dodge Viper

Written by tonks on December 29, 2006

2008 Dodge ViperFor the 2008 year, the Dodge Viper SRT will be useing an 8.4-liter aluminum V-10 engine that creates a full 600 horsepower and 560 lb.-ft. of torque. 0-60 times under four seconds, 0-100-0 in under 12 seconds, and braking 60-0 comes in less than 100 feet.

SRT powertrain engineers had to not inly increase performance, but also comply with regulatory requirements such as federal Tier 2, Bin 5 and California’s Low Emissions Vehicle (LEV) 2 mandates. Working with specialists from McLaren Performance Technologies and Ricardo, Inc., SRT engineers began by following the racer’s basic formula for more power: bigger displacement, more efficient breathing and higher engine speed.

The new Dodge Viper SRT10’s deep-skirted V-10 aluminum engine block was bored out 1 mm, raising the displacement to 8.4 liters from 8.3 liters. With strengthened bulkheads and improved water jackets for better cooling, the block includes pressed-in iron cylinder liners and cross-bolted main bearing caps for strength and durability.

The Viper SRT10’s 8.4-liter engine breathes through new cylinder heads equipped with Computer Numerically Controlled (CNC)-shaped combustion chambers, larger valves and Variable Valve Timing (VVT). VVT electronically adjusts when the exhaust valves are open and closed according to engine speed and load, allowing the engine to “breathe” cleaner and more efficiently.

The air-fuel mixture is ignited by platinum-tip spark plugs fired by individual plug coils mounted on the cylinder-head covers. The pistons themselves are equipped with larger-diameter floating pins with bronze bushings for higher loads. Forged powder-metal connecting rods are secured with aircraft-quality fasteners for increased fatigue strength.

The 2008 Dodge Viper SRT10’s V-10 channels its power through a new, smaller-diameter, twin-disc clutch (a change from the larger-diameter, single-disc setup). The new clutch reduces rotating inertia by 18 percent, resulting in reduced clutch-pedal effort and improved engagement feel.

The TR6060 transmission is the latest evolution of the Tremec T56 six-speed manual. It features 10% wider gears for higher torque capacity, and a new synchronizer package. A new shifter system results in reduced shifter travel. There is also now a provision for adding an external transmission cooler.


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