We have a good chip tuner in the Porsche world named Steve Wong and he gets it dialed in for us. Having an air metering box helps as well over other speed density EFI systems that can't compensate. I know on my old sportbikes the main jet had to be increased maybe dozen sizes when adding the K&N filters.
Whenever i run K&N air filters, I find i have to richen the mixture. Not sure is this car auto calibrates fuel mixture or not
We have a good chip tuner in the Porsche world named Steve Wong and he gets it dialed in for us. Having an air metering box helps as well over other speed density EFI systems that can't compensate. I know on my old sportbikes the main jet had to be increased maybe dozen sizes when adding the K&N filters.