And the limit is the same 83B?

I think so. Here is the relevant code snippet:

GitHub

bitcoin/src/script/script.cpp at eeb9cc1120661d0e9fd28ddb6fef2c04992a4666 · bitcoinknots/bitcoin

Bitcoin Knots enhanced Bitcoin node/wallet software - bitcoinknots/bitcoin

It is a function called DatacarrierBytes and I don't know c++ all that well but it appears to match transactions containing OP_FALSE OP_IF or OP_RETURN, and counts the number of bytes they carry as a payload. I assume this function gets called wherever the data arrives filter is applied, which I suppose is probably in policy.cpp -- though I haven't checked

I don't know enough either, but I wonder if the is used also on inputs, or just outputs.