Krusty, real 190A8 had the following "general" powersettings:
1.20 ata, 1360 Hp, 310 mph at sea level (below current military)
1.32 ata, 1550 Hp, 325 mph at sea level (current military, max throttle)
1.42 ata, 1730 Hp, 345 mph at sea level, 146 GPH (MISSING, no way to reach it with throttle)
1.58 ata, 1870 Hp, 360 mph at sea level, 180 GPH (Current WEP)
What you call "uber wep button" is just what we have now.
Now, if you need speed, you jump from 1.32 ata to 1.58 at the cost of 180 GPH, surelly, if you are low on fuel, 1.42 ata at 146 GPH would be more than useful to you.