The owner of a 2001 Audi S4 decided to install a rear limited slip differential on his high-performance US-spec sedan. It wasn’t just any run-of-the-mill differential as it was actually sourced from a Porsche 944 Turbo packing a 220 HP punch and a manual gearbox while the LSD had a 40 percent lockup setting.
As far as the Audi S4, when it came out of the factory it had a V6 2.7-liter turbocharged gasoline engine delivering 265 HP and 400 Nm of torque to a quattro all-wheel drive system. It needed only 5.7 seconds to cover the 0-62 mph (0-100 km/h) sprint but in this application the engine puts out close to 400 HP thanks to a VAST Tuning Stage III package.
The Torsen center differential is in charge of splitting the engine’s output between the two axles while the limited slip differential makes sure this 2001 Audi S4 verifies that everything is in order. An LSD is suitable because it provides more traction on both dry and wet surfaces and still allows the driver to go sideways as seen in the attached video.
Those of you who own an Audi S4 can contact Kevin Gross from Catellus Engineering to fit a limited slip differential. You can check out the video’s description on YouTube for more details.