Where does the OP say he is using a bigger chain ring or cranks? If he isn't chain tension is unaffected.
He is also not putting more torque through the chain rings - Torque in this direction is unchanged as its nearly totally dependent on the chain ring diameter and the crank length.
This is hence why I referred to "If on a Road Bike" [as opposed to a mountain bike] - I should have made that clearer
. I was therefore assuming more torque from my assumption that the chainring would be bigger, but my experiences of the same situation relates solely to MTBs.
Which gives us a 25% increase in Torque along this line and thats without taking into account the length of the pedal spindle which would reduce it from this value.
In reality the calculations are more complex and I would guess a much lesser increase.
Then it all comes down to whether this causes any problems or not in terms of transferring the torque into the frame at the BB shell, and whether it twists, and whether that causes any knock-on effect, hence trying it is almost always the best option.