modelling transition with v2f turbulence model

pablo

I'm modelling airfoils in transitional reynolds number using v2f turbulence model and e-n transition method ( n=9 ).

Using the e-n method I got transition occurs at around 50% chord, by other hand with v2f model transition occurs at 10, 15% chord. So, in order to delay the transition process I would like to know which model's constants are able to play with them so transition can be delayed downstream.

thanks in advance.