Blanking the EGR gives no performance increase at all.. Some say the turbo spools slightly earlier which in theory it should but I doubt its noticable..
With SDi's, decat, cone, EGR blanked, boost upped, new maf and remap my ZR made 155 BHP with 262 lb ft torque, it was a rocket.. But due to the torque it ruined my gearbox which is why im now breaking it