Putting washer in the BOV to stop it opening under light l;oad is the right thing to do. Jim,my-rigging a boost controller onto a BOV to do the same thing is The should try reading the instructions for setting the BOV

2000 SVT Turbo 295hp/269ftlb@12psi #1 for Bendix Brakes Kits! Knuckles rebuilt w/new bearings $55 AUSSIE ENDLINKS $70 Gutted pre-cats $80/set A lack of planning on your part does not constitute an emergency on mine!