Hayden Manson

Hi, I have a 1989 Legacy RS with a LINK V5 (I think it is a V5 anyway, PC tunable). I rally race the car with 36mm restrictor and the tune is pretty good, lots of low down power (no Anti-lag). But on idle the car sounds very standard. Is there anyway to get a Roaming idle or as least something abit lumpier??? Cheers Hayden