Leeroy_25

Just wondering if in the absence of an idle control valve could I use the T°wat table to create a slight idle effect from cold start by adding in some time for ambient water temp and zero this back off at 82degs for running temp? I am thinking maybe 5degs max at ambient water temp and then graduating back to zero? Anyone got any thoughts or tried this? My thought being you are not going to be revving or getting on boost with a cold engine!