I'm using hptuners with an mpvi3 to tune my 97 gt, but you do need to get the special firmware and use the latest beta software

Do you have an mpvi3? If so hptuners now works with some of the older stuff. I'm using it on my 97 mustang gt

The tunerpro numbers are definitely out to lunch. 2x engine displacement lines up with the PI manifold on the crown vic, so it's probably pretty close. I'll start there unless someone has some stock numbers from an NPI car

Does anyone know the manifold volume for an NPI manifold? I'm working on a 97 mustang GT using HPtuners and I have what is supposedly stock files for a 2002 mustang GT and a 2011 crown vic. Both are PI engines and the mustang shows 9.63L and the crown vic shows 9.2L. I would think the NPI with its s...