Turbo whistle what could it be?

[suprat]

Hey guys im new to the forums and i just bought an 88 toyota supra turbo and i have started to here a whistle sound that i didn't hear before. Ive have only had the car for about 1 week. The guy who had this car before looks like he didn't know what he was doing he put silicone on the turbo inlet pipe and it has since come off and there is a big hole there. This is not my first turbo car but i am not sure if it could be that hole that im hearing that noise or could it be the turbo. I really cant step on it cause i need a maf sensor mine is shot. As soon as i connect it the car stalls out. Do you guys think it would be ok to run the car like that until i can get the maf it cost $400 new and i cant find it used. And do you guys think that sound im hearing could be a bad turbo. Need Help.