Wastegate spring
 

I am currently looking at a Tial 46mm wastegate and I plan to run at 1bar. The question is should I go with a 1 Bar spring or go with a 0.7bar spring and tighten the nut and use the boost controller to get 1bar? As I was doing some searching there is some mention that the different spring will effect the spool up. I dont plan to go below 1 bar but not above 1.1 also as my tuning was done up to 1.1 only. Will the 1bar spring very by much if tension is added to the nut?