[Jerain]

So after doing another test but now with the small air filter off and capping off the two holes on the inlets (so just stock intake with K&N drop-in and airscoops). First off the IAT were a bit lower, about 6-7F less at the end of 4th gear (and the outside temp are almost freezing over here).

Also the WGDC bank 1% was exactly the same, around 47% max. Also noticed that with the so called DIY BOV mod (stock DV vent to atmosphere) you lose a bit of boost in the first second(s) of WOT, so in the log clearly shows the first RPM not as easy reaching boost target. Normally that's not really a problem because the 2 stock DV vent to inlets itself improving the aircharge. Now they operate a bit slow and that first boost is lost in the engine bay. You can even hear that first part after WOT they lose some boost. Also the whp in virtual dyno are around 450whp so the same as the previous average VDs with the small filters.

Conclusion: If you want the lowest IAT (not really a problem if you have a really big intercooler), you want the best throttle response and spool up in low rpm, keep stock DV and intake.

For me as a Nurburgring driver and drifter, the low rpm torque and throttle response are more important than those few possible gained whp in the really high rev range.

Does anyone has real world experience with the Turbosmart DVs? Seems in testing they respond quicker and hold boost better than the stock DVs?