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SRT-6 ENGINE

 

YOU BETTER BELIEVE IT, THE STOCK OUTPUT OF THIS 3.2 LITER V6 BEAUTY IS 349 BHP / 354 PS!

 

Chrysler Crossfire SRT-6, Mercedes SLK32 AMG and C32 AMG all share an engine based on the 3.2-litre (3199 cc) V6 that in its naturally aspirated (NA), non supercharged form already develops 163kW (221 PS) and 310Nm, goes 0–60 mph in 6.5 seconds and has a top speed of 245 km/h (152 mph). However, the supercharged version lifts peak torque by more than 45% and power by a staggering 63%!

 

 

THE SRT-6 OFFICIAL ENGINE PERFORMANCE FIGURES

NOTE! THE OFFICIAL ENGINE PERFORMANCE FIGURES WERE LOWERED DUE TO MARKETING STRATEGY SEE RED FOR TRUE FIGURES

 

Type and Description: Supercharged, 90-degree bank angle, liquid-cooled and twin ignition

Displacement: 195.2 cu. in. (3199 cu. cm)

Bore x Stroke: 3.54 x 3.31 (89.9 x 84)

Valve System: SOHC, two intake valves and one exhaust valve per cylinder, roller rocker arms

Fuel Injection: Sequential, multi-port, electronic

Construction: High-pressure die-cast alu alloy block with Silitec alloy liners and cast-aluminum alloy heads

Compression Ratio: 9.0:1

Official Power: (SAE net) 330 bhp (246 kW) @ 6,100 rpm

Official Torque: (SAE net) 310 lb.-ft. (420 Nm) @ 3500-4800 rpm

True Power: (SAE net) 349 bhp (354 PS) (260 kW) @ 6,100 rpm

True Torque: (SAE net) 332 lb.-ft. (450 Nm) @ 4400

0-60 mph, 0-100 km/h: 4.8 sec, 5.2 sec

1/8, 1/4 Mile: 8.x sec, 13.x sec

Top Speed mph, km/h: 155 mph, 250 km/h limiter

Max. Engine Speed: 6,400 rpm electronically limited

Fuel Requirement: Unleaded premium—91 Octane (R+M)/2

Oil Capacity: 8.5 qt. (8.0L) with dry filter

Coolant Capacity: 11.8 qt. (11.2L)

Emission Controls: Three-way catalytic converters and internal engine features (a)

Max. Gross Trailer Weight: Not recommended

Estimated EPA Fuel Economy mpg (City/Hwy): 17/22—automatic transmission (b)

 

(a) Meets LEV 1 requirements for California, NY, MA, ME, VT; meets Tier 2, Bin 9 for all other states. Meets Stage IV emission requirements in Europe.

 

(b) Compare the estimated mpg to the estimated mpg of other vehicles. You may get different mileage depending on how fast you drive, weather conditions and trip length. Your actual highway mileage will probably be less than the highway estimate.

 

 

THE SRT-6 TRUE ENGINE PERFORMANCE FIGURES

 

At the launch of the SRT-6, as mentioned above, the official performance figures of the SRT-6 was lowered due to a marketing strategy. The Mercedes SLK R170 32 AMG was supposed to be superior in performance and to be seen as more luxurious than the SRT-6. It had to be worth its higher MSRP price tag of $54,000 compared to the SRT-6 having the base price tag of $44,820 (coupe) $49,170 (roadster). The solution was to market the SRT-6 with lower performance figures, for example the BHP was promoted being only 330 BHP instead of its true 349 BHP (354 PS). Chrysler officials and members in the SRT-6 manufacturing team have confirmed this information. The statement from Jeff Reece, Crossfire Development Engineer found in the SRT-6 History video "... SLK 32 AMG claimed about 350 BHP... Same engine (as SRT-6)...and we had better cooling... so our output should have been a bit higher..." gives us even more tangible proof backing up this story. Therefore, this SRT-6 engine pumps out 260kW at 6100 rpm and 450Nm at 4400 rpm. 349 BHP (354 PS) stock was and still is a high amount of power and torque into such a small body. With a good launch you can reach 0-60 mph in this automatic transmission car in 4.8 seconds and running the 1/4 mile in 13 seconds!

 

IMPROVED ENGINE

 

So what have the engineers done to this V6 engine to so radically increase its power in the SRT-6? As you might expect, it's no ordinary bolt-on conversion. The 90-degree V6 was heavily revised for its new high-boost forced aspiration role with the supercharger. Interestingly, most internal alterations were aimed at improving durability, rather than breathing. Mechanical changes included:

 

- A new crankshaft with bearings adapted to the higher output torque

- New connecting rods

- Pistons of a "highly temperature-resistant material"

- A new balance shaft

- Lightweight "assembled" camshafts

- Harder valve springs

- A new oil pump with a higher output, supplying to oil nozzles that in turn are upgraded in flow by 70 percent

- The exhaust was re-designed to incorporate four low back-pressure thin-wall catalytic converters, and the airflow meter normally fitted to the 3.2 liter six was discarded and replaced with manifold pressure sensing.

 

SOURCES

 

ADD MORE SRT-6 INFO
SRT-6 ENGINE V6 3.2L 349 BHP 354 PS 450 NM 260kW
SRT-6 ENGINE V6 3.2L 349 BHP 354 PS 450 NM 260kW
SRT-6 ENGINE V6 3.2L 349 BHP 354 PS 450 NM 260kW
SRT-6 ENGINE V6 3.2L 349 BHP 354 PS 450 NM 260kW
SRT-6 ENGINE V6 3.2L 349 BHP 354 PS 450 NM 260kW

Photo above show the SRT-6 engine that produces 260kW at 6100 rpm, 450Nm at 4400 rpm and 349 BHP (354PS) stock.

Video above with the famous quote from Jeff Reece mentioning the true output of the SRT-6 engine, check it out at 6:54!

SRT-6 ENGINE V6 3.2L 349 BHP 354 PS 450 NM 260kW
SRT-6 ENGINE V6 3.2L 349 BHP 354 PS 450 NM 260kW

Photos above showing the SRT-6 engine being taken apart. Credits: Michael C. Jr.

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