[Closed] Something to gauge performance (race)

Feeling far more positive now I've settled into some specific training and have races soon.

Thing is I'm training on the turbos with just a HRM and stopwatch. So all I can do to see how I'm doing is the following;
Set the resistance to 4 on my Elite Sirrius
Select the gear 53x14
Count the cadence 80
HR is around 145/147
(3 x 10 minute sustained sessions)

The HR is just dropping a tad now using the same set up. I seriously don't know if it means anything?
There is kit you can hire I believe, but how long will I need it for to access my state?