let me guess... your problem was you couldnt get the boost high enough?

im not being arsey, i can explain how it works pal

if im right ,your boost would have been capped at about 23psi ,and wouldnt go any higher, the fix would have been to remove the restrictor from the return to air filter port of the amal valve, thus allowing more air to be bled off, the valve basicly gets drowned by the increase in boost and cant get rid of enough to prevent the wastegate actutaor opening....