FT012 upgrade 35mm prop, worth it?

FT012 use FT011 35mm propeller.
I tried a 35mm prop replacing a broken 30mm prop and it was slow than before..
So..using 35mm prop does not increase speed..it is not worth it..!
Even the motor and esc become hot quickly..
That from me, other people i do not know how the result.
THANKS..