after fitting my 600x300x75 fmic, and boost controller... my car is hitting approx 15psi or more..
i used to have a 450x300x75 fmic, and no boost controller.. car used to hit 10psi, and the bov made a tad quieter than normal sound..
after fitting the 600x300x75 and boost controller (no adjustment made, tried it without it too), car got up to 0.5 bar as per normal, then it rocketed up to a bar, and the blow off valve makes a very loud noise on throttle release now...
edit: this isnt flat footing it either, this is 3/4 throttle up to about 5000RPM, then changing gears.
only thing i can think of is the hose from my boost controller/bleed valve is a smaller internal size than ther old hose, as it was too short.. is the smaller hose restricting flow to the wastegate, thus pushing boost up?
any ideas would be great, cheers!