How to increase time scale limit?

Unity Engine
1

Is it possible to increase the time scale limit in unity above 100?

I want to increase the game speed but using a multiplier is not cutting it for me as the result becomes inconsistent depending on the multiplier, however by changing time scale no such problem appears. And therefore I was wondering if it is possible to increase it.

If not any tips on how to create my own time multiplier that wont be inconsistent, not even in milliseconds, as I am working on creating a simulation.

Using a single static timer for all scripts did not work any better and using a simple multiplier was also no good.

My multiplier attempt:

private void FixedUpdate() {
timer += Time.fixedDeltaTime * multiplier;
}
2

What happens if you try Time.deltaTime in Update?

3

With FixedUpdate it gives different results based on the multiplier however with Update it always gives different results, even with same multiplier.