[cstavaru]

Hi,

I dynoed my car today with stock filter and with Helene filter. My car is 100% stock, aside from the BMW Performance Short Shift Kit (which does not interfere).

I never saw low-RPM dynos so I specifically ask the guy to dyno from 1500RPM.

I obtained 272whp after correction, 266 before correction. Temp was 34.5 degrees Celsius, pretty high...

The Helene filter brought identical results with stock ! (so I kept the stock filter).

Here are the graphs (I will replace them with higher quality ones scanned, these are just quick iPhone shots) (the first one is stock, the second is Helene).