Smokey,remember Boeings reference to this in 84 AIRLINER figure 4 shows the schematic of 'variable decision speeds on the takeoff performance'
to quote the article"It can be seen that a takeoff continuation with an engine failure recognition speed 5 knots below V1 would place a 2 engine at 18' instead of 35' required by regulations.However,an abort decision 5kts above the scheduled V1 would cause the airplane to continue over the end of the runway at a speed between 50 and 72 knots depending on weight..
Boeing go/no go...
At the risk of being cheeky I note your out of Singapore,ergo wouldn't you have the WET info in your AFM...You don't sound convinced of the wet data's 15 screen??
regards