Yes, it does. Previous had a standard T3 with -34 actuator (act almost brandnew) and was peaking at 26 psi and holding 18psi.
Now bought a brandnew T34.55 turbo which peaks at 32psi but only helds 18 psi at 6000rpm in fourth.
Thinking maybe through the bigger exhaust housing it should need a bit more preload because off the extra build-up from exhaust gas pressure at high rpm but dont know for sure..
not sure im no expert but wouldnt have thought that would have made a difference as its peaking at 32psi maybe a weak actuator? Deffo worth a call to msd as its one of their chips they can advise you better on things to try