Discussion
Does anyone know the max output on the k24's from the x50 996tt. There seems to be a lot of contradictory stuff out there some say 535 bhp max. Wheareas other well known companies are quoting 575 with remap exhaust and headers. Can anyone throw any light on this?
I undrestood the absolute max they could run to was 590, but obviously you would knacker them at that so what is a realistic power to run on them?
Cheers J
I undrestood the absolute max they could run to was 590, but obviously you would knacker them at that so what is a realistic power to run on them?
Cheers J
See: A turbocharger consists of a turbine and a compressor. The pressure of the engine exhaust gases causes the turbine to spin. The turbine drives the compressor, which is typically mounted on the same shaft. The spinning compressor creates turbo boost pressure which develops increased power during combustion. A wastegate at the turbine intake limits the amount of boost pressure to protect the turbocharger and engine components. When boost pressure reaches a predetermined value, the wastegate opens to provide a bypass for a portion of the exhaust gases which pass directly into the exhaust manifold.
Wastegates may include a mechanical valve or a solenoid actuated valve. In either case, failure of the valve may result in damage to the turbocharger or the engine. Valve failure may occur due to tampering in an attempt to achieve higher boost pressures. Wastegate failure due to tampering may result in turbo overspeed or turbo overboost which may cause excessive wear and damage to the turbocharger and engine components. Of course, other factors may also cause undesired turbo overspeed or turbo overboost regardless of whether the system utilizes single turbocharging or sequential turbocharging in which a plurality of turbochargers are arranged in sequence and selectively operated as desired.
Effectively if you hold in the boost beyond a certain point by keeping the waste gate closed the turbo will spin beyond its design criteria. It is not just revs but heat. It is a dynamics issue, all to do with the compressor map & way beyond my simple education.
A K24 is around a 27Lb/min turbo. This equates to 270 BHP each at max efficiency.
Cheers
Allan
Wastegates may include a mechanical valve or a solenoid actuated valve. In either case, failure of the valve may result in damage to the turbocharger or the engine. Valve failure may occur due to tampering in an attempt to achieve higher boost pressures. Wastegate failure due to tampering may result in turbo overspeed or turbo overboost which may cause excessive wear and damage to the turbocharger and engine components. Of course, other factors may also cause undesired turbo overspeed or turbo overboost regardless of whether the system utilizes single turbocharging or sequential turbocharging in which a plurality of turbochargers are arranged in sequence and selectively operated as desired.
Effectively if you hold in the boost beyond a certain point by keeping the waste gate closed the turbo will spin beyond its design criteria. It is not just revs but heat. It is a dynamics issue, all to do with the compressor map & way beyond my simple education.
A K24 is around a 27Lb/min turbo. This equates to 270 BHP each at max efficiency.
Cheers
Allan
Weltmeister said:
See: A turbocharger consists of a turbine and a compressor. The pressure of the engine exhaust gases causes the turbine to spin. The turbine drives the compressor, which is typically mounted on the same shaft. The spinning compressor creates turbo boost pressure which develops increased power during combustion. A wastegate at the turbine intake limits the amount of boost pressure to protect the turbocharger and engine components. When boost pressure reaches a predetermined value, the wastegate opens to provide a bypass for a portion of the exhaust gases which pass directly into the exhaust manifold.
Wastegates may include a mechanical valve or a solenoid actuated valve. In either case, failure of the valve may result in damage to the turbocharger or the engine. Valve failure may occur due to tampering in an attempt to achieve higher boost pressures. Wastegate failure due to tampering may result in turbo overspeed or turbo overboost which may cause excessive wear and damage to the turbocharger and engine components. Of course, other factors may also cause undesired turbo overspeed or turbo overboost regardless of whether the system utilizes single turbocharging or sequential turbocharging in which a plurality of turbochargers are arranged in sequence and selectively operated as desired.
Effectively if you hold in the boost beyond a certain point by keeping the waste gate closed the turbo will spin beyond its design criteria. It is not just revs but heat. It is a dynamics issue, all to do with the compressor map & way beyond my simple education.
A K24 is around a 27Lb/min turbo. This equates to 270 BHP each at max efficiency.
Cheers
Allan
I kind of agree with this Allan, but can you clarify BHP at Flywheel or WheelsWastegates may include a mechanical valve or a solenoid actuated valve. In either case, failure of the valve may result in damage to the turbocharger or the engine. Valve failure may occur due to tampering in an attempt to achieve higher boost pressures. Wastegate failure due to tampering may result in turbo overspeed or turbo overboost which may cause excessive wear and damage to the turbocharger and engine components. Of course, other factors may also cause undesired turbo overspeed or turbo overboost regardless of whether the system utilizes single turbocharging or sequential turbocharging in which a plurality of turbochargers are arranged in sequence and selectively operated as desired.
Effectively if you hold in the boost beyond a certain point by keeping the waste gate closed the turbo will spin beyond its design criteria. It is not just revs but heat. It is a dynamics issue, all to do with the compressor map & way beyond my simple education.
A K24 is around a 27Lb/min turbo. This equates to 270 BHP each at max efficiency.
Cheers
Allan
Weltmeister said:
Using the Lb/min is always flywheel on an engine dyno. So for example a GT2 after exhaust/filter/ECU programme will deliver around 455 BHP at the wheels for 535 BHP "at the fly" calculated.
Cheers
Allan
Allan, Cheers
Allan
From your experience what effect would Headers have in addition to the Exhaust/Filter/ECU Programme?
C.
Rob
Torque [mathematical calcs aside]is arrived at simplistically as a result of boost. Particularly higher torque at lower revs, the turbo's are still in the heart of the efficiency envelope.
The turbo itself blows x air per minute,unless it is a variable vane unit, however the higher the revs the less efficient it becomes for a number of reasons....So the midrange is the ideal point to run good boost to achieve great torque.
Cheers
Allan
Torque [mathematical calcs aside]is arrived at simplistically as a result of boost. Particularly higher torque at lower revs, the turbo's are still in the heart of the efficiency envelope.
The turbo itself blows x air per minute,unless it is a variable vane unit, however the higher the revs the less efficient it becomes for a number of reasons....So the midrange is the ideal point to run good boost to achieve great torque.
Cheers
Allan
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