A Few things are different, and MANY misconceptions.
Turbo’s in a standard 2020 Expy and Navigator are the same size. Turbine in the Navigator is made of a different material, to better withstand added heat stress.
Pistons are different, and the HO(Raptor/Navi) actually run lower compression to help with Cylinder pressure.
Those small physical changes allow the Tuning to be more aggressive.
Regular 2020’s should be beasts with a proper tune.
Mine needs to get over 1000 miles and we will see what she is capable of. Stock on Dragy I got 6.4 sec 0-60 with Sport engaged, and Traction control off. Not bad at all for a Limited, Heavy Tow EL 4x4 with 22’s.
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