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Variable geometry turbos as in our N47s are superior even to twin scroll turbos. We have infinite scroll regulation.
The VNT/VGT turbos just get very expensive to build for them to withstand gasoline EGTs. Porsche started using them on their gas cars, and greatly reduced their lag.
Lag that is introduced by changing the volume of the tract to the intake can be improved by tuning. Factory flash turbo control was designed for the factory setup. I doubt anyone is tuning that.
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-2014 328d Wagon, 8HP. Self-tuned, 270hp/430ft-lbs.
-2019 M2 Competition MT, Alpine White. Self-tuned 560hp
-2016 Mini Cooper S, MT. Many plans.
Others:
-E36 328is. 2000 Z3 Roady. 2003 VW Jetta TDI Manual. Estoril Z3M Coupe.
Last edited by Enabled; 08-17-2018 at 10:22 PM..
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