i'm not speaking for Nikos but i do believe that is not what he said. He said it needs to be checked. The motor needs to be clayed in order to answer your question b/c every motor is different.what nikos means is that in general, on a stock motor, with the proper valve train. 50 degrees will be ok. however it is not somthing that you want to run for the whole powerband. ideally you want max degrees on a honda motor anywhere from 500-1000 rpm below and above vtec engagment (wherever that may be) and steps up to and down from. that is a basic cam degree tune.