Afternoon all.
I have been fiddling off and on with my VNT for a short while now.
I can either get
a) upto 10psi @ 2000rpm with the rest following around 4000rpm ( total - 18 psi ish ) The car feels nippy at the upto 10psi but feels flat at anything over it
b) it working like a t28, nothing then bang at 18psi and 4000-4500 rpm.
Neither as you appreciate are ideal.
From what I can work out I either have the duty at below 70% or above 80% but I cant find the sweet spot.
Any ideas what to do ? For reference I have the 18psi dialled in with actuator rod length and the "stopper" ( the small grub screw ) is right at the top stopping the rod from going touching the body of the turbo