Rb26 Weird Screaming Noise

[MrStabby]

I have a noise that sounds to me like a stuffed alternator or PS bearing, but its more mid or rear of motor. Its only noisy in vacuum or boost, which makes me think its a whistle caused by a manifold leak, but its very loud for that. I've checked the boost controller/FPR connections and it all looks ok. The noise is not affected by moving the tubes, so i guess that means its not a leak there. The plenum was off about 3 months ago but its been fine until now, and the top row of nuts are still tight.

Any ideas?

[MrStabby]

Bumpity....

Cam bearing? What areas see boost/vac? Could it be something to do with PCV?

[Messiah]

so a screaming noise when under boost.....

hmmm....

are you sure its not your passenger???

[MrStabby]

so a screaming noise when under boost.....

hmmm....

are you sure its not your passenger???

Lol. Actually that seat's empty, but I could be hearing voices....