Turbocharging a naturally aspirated car. I noticed that int he Mk program description it says you can make a turbo viper. I haven't treid many turbo NA motors but the one I made had a ton of problems when revving. at low RPMs it had horrible problems revving up. but when it got to the high RPMs the power was there. like 7 seconds to rev it seemed. Do certain Turbo's or N/A engines accept turbochargers better than others? Does using upgrade from a supercharged motor act any different? Thanks!