Does anyone know the difference
08-23-2024, 03:27 AM
#1
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Does anyone know the difference
in how the performance increase in the 4.0 engine is generated for the individual models S, GTS, Turbo and Lamboghini Urus (same engine with 650 hp) ?
with Software , Turbos etc ?
with Software , Turbos etc ?
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ThomasWShea (08-23-2024)
08-23-2024, 09:14 AM
#3
The Turbo GT at least has significant internal differences:
"The internals of the GT model’s eight-cylinder engine differ with respect to fundamental components such as the crankshaft, connecting rods, pistons, timing chain drive and torsion vibration dampers. In view of the increased power, these components have been designed for higher load peaks and driving dynamics. In some cases, new materials have been used to further and significantly enhance the engine's robustness during track use. New fuel injectors supply a flow rate that is approximately ten per cent higher than before with an unchanged maximum injection pressure of 250 bar.
The engine's entire airflow system has been designed for increased throughput. Larger air/water intercoolers allow a higher volume to pass through, and the turbochargers have larger compressor wheels. Both efficiency and power have been increased in combination with a maximum boost pressure raised to 1.6 bar. In order to improve responsiveness and performance, turbocharger pre-loading has been increased at higher engine speeds. This means that a boost pressure reserve is built up between the turbocharger and throttle valve in partial load and overrun operation, which is then released when the driver presses the accelerator and transformed into instantaneous torque output. To prevent the knock limit from being exceeded, the engine's compression ratio has been reduced from 10.1:1 to 9.7:1. Three additional radiators ensure that the driver can call on the engine's power continuously and without restrictions under all conditions."
https://media.porsche.com/mediakit/c...nd-performance
"The internals of the GT model’s eight-cylinder engine differ with respect to fundamental components such as the crankshaft, connecting rods, pistons, timing chain drive and torsion vibration dampers. In view of the increased power, these components have been designed for higher load peaks and driving dynamics. In some cases, new materials have been used to further and significantly enhance the engine's robustness during track use. New fuel injectors supply a flow rate that is approximately ten per cent higher than before with an unchanged maximum injection pressure of 250 bar.
The engine's entire airflow system has been designed for increased throughput. Larger air/water intercoolers allow a higher volume to pass through, and the turbochargers have larger compressor wheels. Both efficiency and power have been increased in combination with a maximum boost pressure raised to 1.6 bar. In order to improve responsiveness and performance, turbocharger pre-loading has been increased at higher engine speeds. This means that a boost pressure reserve is built up between the turbocharger and throttle valve in partial load and overrun operation, which is then released when the driver presses the accelerator and transformed into instantaneous torque output. To prevent the knock limit from being exceeded, the engine's compression ratio has been reduced from 10.1:1 to 9.7:1. Three additional radiators ensure that the driver can call on the engine's power continuously and without restrictions under all conditions."
https://media.porsche.com/mediakit/c...nd-performance
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daveo4porsche (08-23-2024)
08-23-2024, 09:23 AM
#4
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