S5 turbo into S4
#4
Lives on the Forum
All parts are identical except for the turbine housing and the "T" pipe for the Kouki turbo.
You'll also need to swap the oil drain pipes.
Some have complained that it doesn't fit.
-Ted
You'll also need to swap the oil drain pipes.
Some have complained that it doesn't fit.
-Ted
#5
I'm a boost creep...
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Here's the definitive comparison between S4 and S5 turbos:
The compressor wheels are the same.
The compressor housings are the same.
The centre housings are the same.
The turbine wheels are the same.
The exhaust connections are the same.
The wastegate actuators are the same.
The coolant flow and return lines are the same.
The oil supply lines are the same.
The exhaust manifolds are different; S4 has twin-scroll control flap, S5 is fully divided.
The exhaust housings are different; S5 has dual wastegate to suit divided manifold.
The oil drain lines are different; S5 is longer to clear OMP.
The metal wastegate lines are different; S5 has a tee for the boost control solenoid valve.
The compressor wheels are the same.
The compressor housings are the same.
The centre housings are the same.
The turbine wheels are the same.
The exhaust connections are the same.
The wastegate actuators are the same.
The coolant flow and return lines are the same.
The oil supply lines are the same.
The exhaust manifolds are different; S4 has twin-scroll control flap, S5 is fully divided.
The exhaust housings are different; S5 has dual wastegate to suit divided manifold.
The oil drain lines are different; S5 is longer to clear OMP.
The metal wastegate lines are different; S5 has a tee for the boost control solenoid valve.
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