Hi! Like the tittle say's, i have a peugeot 406 2.2 HDi that uses a VNT15 turbo and in the past, i had a PUG 406 2.0 HDI with a normal GT15 turbo. The 2.2L is much faster and i have proved it with 0-60mph but in reallity, i'm really disapointed how the car pulls. I feels like a really weak car (too linear), but it's fast at the same time :D

So,
on the 2.2L, with the longer gearbox,i have about 150bhp and did 8,7S from 0-60mph, confirmed with the Torque App;
on the 2.0L, with the short gearbox and 100kg less, i had about 120bhp. It did 9,5S from 0-60mph but it feels more powerfull when pulling hard.

My final question is, can a tune solve this? Like changing the N75 value to make the turbo spull harder or changing torque limiter curve?
Or the real problem is the GT1549P turbo that is small and because it's VNT its more linear than a normal GT15?

I will leave my tune with mappack below:
Atention: I'm using the R65 fuel pump because my original R70 have leaks and its failling. That's why the Rail pressure and Rail pre-control is completely changed.

I compared my n75 tables with other car tables and it's clear that mine isnt normal. I have a almost flat table with a variation of +/- 20% across the REV range. Other cars, with similiar specs have a "ramp" style N75 maps! Today, i drove a BMW 320d 150hp and that thing pulls really well!! It has a GT1749V turbo