just put a B MAX with 1:36 ratio on my 01 velocity 280 with a HP 500 where should I start for a prop ? thanks in advance

Probably start with a 24 pitch, run around low to mid 70's

I take you had an Bravo Performance outdrive or an Bravo XZ on before the BMax ? Of so, for the outdrive change, I would like to know of any speed loss and or the results in that department including any positive results.

If speed loss and or any other negatives can you report that as well, and how much speed loss if it does happen

Thanks