Rep Power: 0

I have a b20b turbo with gsr head my car was dyno tune but it was running rich it wet my sparks and every 2 or 3 days a had to clean them so what i did was i lowered my fuel pressure from 41 to 40 or 39.5 and now it runin perfect and dont wet my sparks but do i have to dyno tune again or its ok if i use it like that ?

 
Rep Power: 143

Do your fuel trims stay in the safe range on hard acceleration/ high load conditions? If they do then you are fine.