hello guys i have a full bolt on tc and a 75 shot(wet) for weekend i was wondering if i could run race fuel (unleaded) with out having to tune for it

I'm wondering this for a completely stock tC... I have been doing a little research and haven't read anything yet to say it'd hurt anything. As long as it's unleaded.

it may not hurt, but it could lose hp. what octane?

What's the point? What mods do you have? If you aren't retuning then its just pointless. The point of having race fuel is cause you need the higher octane and/or to run more aggressive timing.