Anaheim, Calif. – October 27, 2004 – The all-new 2005 Chrysler 300C SRT8 ‘drives in’ at a popular California fast food restaurant to kick off the California International Auto Show today. Powered by an all-new 6.1-liter Hemi(R) V8 engine that delivers 425 horsepower, the 2005 Chrysler 300C SRT8 builds momentum for Hemi and the Chrysler 300C and is the latest addition to the Chrysler group’s Street and Racing Technology (SRT) performance vehicle lineup.
The 425-horsepower, normally aspirated 6.1-liter HEMI is the highest specific-output V-8 engine ever offered by the Chrysler Group. Although the Chrysler HEMI was born in the 1950s and entered into legend in the 1960s and ’70s, today’s version took much of its inspiration from the original – particularly the namesake hemispherical combustion chambers that provide power and efficiency.
The SRT powertrain engineers who developed the Chrysler 300C SRT-8’s engine achieved more horsepower by adding more cubic inches, increasing the compression ratio, redesigning the cylinder head intake and exhaust systems for increased flow, and increasing engine speed. Compression ratio was also increased to 10.3:1 from 9.6:1, unleashing more energy in the combustion process.
Engine breathing was increased with new high-flow cylinder heads, a specially designed intake manifold, and exhaust headers with individual tubes encased in a stainless steel shell, all unique to the 2005 Chrysler 300C SRT-8’s 6.1-liter HEMI engine. Larger diameter valves and reshaped cylinder ports in the heads allow for maximized air flow. The intake manifold was designed with larger diameter runners for higher-speed tuning. Exhaust is routed through a larger-diameter (2.75-inch vs. 2.5-inch) exhaust system with 3.5-inch chrome tips.
Performance-oriented camshaft profiles were developed to balance total vehicle requirements, simultaneously allowing more air in and out of cylinders. This increases performance and manages a higher engine speed, which is another method to increase horsepower. SRT engineers increased the HEMI’s peak engine speed nearly 15 percent, to 6,200 revolutions power minute (rpm) from 5,400 rpm. Intake and exhaust valve stems are hollow, and the exhaust valve stems are filled with sodium to help dissipate heat more efficiently.
The high-performance 6.1-liter HEMI is further strengthened with a host of redesigned components, including a reinforced engine block with increased coolant flow, forged steel crankshaft, high-strength powdered-metal connecting rods, floating-pin pistons (cooled by oil squirters), and an oil pan modified for reduced oil foaming.
The 6.1-liter HEMI’s power is channeled through an A580 five-speed automatic transmission with specially calibrated AutoStick driver-selectable range control, which offers fully automatic or manual shifting selection. A heavy-duty four-flange prop shaft sends the torque from the transmission to an upgraded differential and axles.
Ride and Handling
Chassis setup for the Chrysler 300C SRT-8 is aimed at all-around performance with a number of enhancements, including tuned dampers, specially tailored spring rates and suspension bushings and larger-diameter anti-sway bars. New front and rear suspension knuckles contribute to a ride height lowered one-half inch from the Chrysler 300C. And, the Electronic Stability Program (ESP) has been specially tuned for the SRT-8’s performance handling characteristics.
The Chrysler 300C SRT-8 connects with the road via a new wheel and tire assembly consisting of 20-inch forged aluminum wheels shod with high-performance Goodyear F1 three-season tires (four-season tires are an available option) with asymmetrical tread.
All four wheels feature stout performance calipers developed by Brembo and equipped with four pistons. Up front, the Chrysler 300C SRT-8 has 360 x 32mm vented rotors, with 350 x 26mm vented rotors in the rear.
Befitting its high-performance character, the new 2005 Chrysler 300C SRT-8 recieves new exterior styling. Modified front and rear fascias help direct air flow, particularly through unique ducts that help cool the brakes. In addition, a specially designed rear deck spoiler, while refined in appearance, is also functional – increasing rear downforce by 39 percent.
Other unique touches to the Chrysler 300C SRT-8’s exterior include body-color front and rear bumper inserts, body-color grille insert with chrome collar, body-color mirrors and door handles, and unique SRT badging.
Two exterior colors are available: Bright Silver and Brilliant Black.
Preliminary performance targets for the all-new 2005 Chrysler 300C SRT8 are 0-60 mph in the low five-second range and a quarter mile time in the high 13-second range. SRT has developed seven vehicles, each of which is the performance leader in its class. The vehicles include the Dodge Viper SRT10, Dodge SRT4, Dodge Ram SRT10, Dodge Ram SRT10 Quad Cab and Chrysler Crossfire SRT6 Coupe and Roadster, and now the all-new Chrysler 300C SRT8. Chrysler 300C SRT8 will arrive in Chrysler dealer showrooms in the spring of 2005.
Story by DaimlerChrysler, edited by Supercars.net
Hemi Cast Iron V8
Pushrod OHV w/2 Valves per Cyl
Returnless Multi-Point Injection
6059 cc / 369.7 in³
2616.2 mm / 103.0 in
90.9 mm / 3.58 in
316.9 kw / 425 bhp @ 6200 rpm
70.14 bhp per litre
225.11 bhp per tonne
569.44 nm / 420 ft lbs @ 4800 rpm
body / frame
RWD w/Traction Control, ESC
P245/45R20 3 Season Goodyear F1 Supercar
P255/45R20 3 Season Goodyear F1 Supercar
Vented Discs w/Brembro 4-Piston Calipers
f brake size
x 360 mm / x 14.2 in
Vented Discs w/Brembro 4-Piston Calipers
r brake size
x 350 mm / x 13.8 in
F 50.8 x 22.9 cm / 20.0 x 9 in
R 50.8 x 22.9 cm / 20 x 9 in
Rack & Pinion w/Hydraulic Assist
Short/Long Arms w/Upper A-Arms, Lateral/Diagonal Links, Stabilzer Bar, Coil Springs over Gas Shocks