Fuel pressure regulator difference between NA 1.6 and NB 1.8
 

Hey guys,

I switched out my 1.8 fuel pressure regulator for a 1.6 one on my 1.8NB swapped NA 1.6 in a vain attempt to cure another problem.
The thing is, i feel as though the car has become noticeably faster and makes more rumbling noises on overrun.

Does anyone know if theres a difference between the fuel pressure that these regulators allow?

Thanks!