What limits power on N54 with stock turbos?

[ShocknAwe]

Florida ?

Charleston

 

[TheFixer]

Depends on ambients I think. Summers here make me want meth. 100° and near 100° humidity the race FMIC struggles badly.

I'm in TN. Really humid here too. But will be moving to VA in a year or so. So ill probably not bother with it.

 

[SlowE93]

I'm in TN. Really humid here too. But will be moving to VA in a year or so. So ill probably not bother with it.

I have people in both states. I hear gas is CHEAP in VA.

 

[ShocknAwe]

Best thing I've found is low boost high timing. Even with these HP800s.

 

[wheela]

Best thing I've found is low boost high timing. Even with these HP800s.

But don't you also have a n53 or ported head?

 

[ShocknAwe]

But don't you also have a n53 or ported head?

Guilty guess it helps even more.

 

[JohnDaviz]

One thing missing here as a power limitation imho, is the exhaust side on the stock turbo. The turbine housing is not designed for high HP output but quick spool.
I don´t know if anyone remembers how the stock n54 setup performes. But i barely feel any turbo and it rather feels like NA car.

Turbos like the HP650/800 have a bigger turbine housing which reduces the backpressure, reduces pumping losses, increases cylinder scavenging efficiency, which is a big bottleneck on the stock housing.

 

[SlowE93]

One thing missing here as a power limitation imho, is the exhaust side on the stock turbo. The turbine housing is not designed for high HP output but quick spool.
I don´t know if anyone remembers how the stock n54 setup performes. But i barely feel any turbo and it rather feels like NA car.

Turbos like the HP650/800 have a bigger turbine housing which reduces the backpressure, reduces pumping losses, increases cylinder scavenging efficiency, which is a big bottleneck on the stock housing.

I already said TURBOS