Can increased clearway increase TOM?
Yes, if you are accelerate-go-limited. But, as stated above, the perticular AD, surrounding terrain & A/C charachteristics will put a limit on how much TOM could increase.
What will effect on V1 be if clearway increases
Assuming that the clearway cannot simultaneously be used as a stopway (LAX example), the aircraft will maintain the same V1 for the accelerate-stop scenario, i.e. the V1 cannot be any higher.
You could lower the V1, as the aircraft would have more distance over which to accelerate to V2 while climbing to 35 ft. - but what would be your advantage? None, unless you also alter the TOM. In the case of clearway, you would have the option of:
1: Selecting a new V2, higher than V2min. This will allow for improved climb.
2: Adding payload or fuel to the aircraft, thus increasing mass. The V1 will be lower, as the aircraft will be harder to stop & thus require a lower abort speed. Due to the increase in clearway, the aircraft will be able to reach V2min at 35 ft., even with the lower V1 and increased mass.
As you see, the gain in TOM would be rather low, as you will have both increased mass
and lower V1 eating away at your increased clearway.
I...errr...think...
