cracked ex. mani = how much power loss?

[FlipDsM]

hi guys,.. well, i've been running my car for a couple weeks now with a cracked exhaust manifold. its on the neck of the manifold just above the turbo on the air intake side. i can hear the leak when i move the throttle body and can feel the air(hot) coming out if i stick my finger right in between the mani. and the turbo. and whenever i accelerate, i can hear leak from inside my car. now, how bad is this as far as loosing power? and is this gonna cause me other problem other than power? i havent have anytime to get a new one. can someone pls. give me an input? i raced a Q35/350Z earlier today and kinda dissappointed. i didn't loose, but we're dead even from 2nd gear till top of the 4th. i'm thinking that i would have won if i have a good manifold(ricer exuse...he he).

thanks guys.

 

[TurboGeoff]

Before turbo exhaust leaks seriously slow you down and kill your spool time.