[christopher]

What is making the whirring sounds? Your turbo?

If it is bogging out, you could be running very rich. If you want to confirm this you could check your spark plugs. Assuming you put new ones in( you should have) when you did the swap, they should still look brand new.

Is it bad now when you rev it? Or is it just at idle? I have problems with my idle right now, but it revs fine.