thats exactly what i found chip.

if you rev it high, you end up loosing so much lift /power,
you may aswell have knocked 500rpm off, and kept it stable, at the end of a session it would have more power, especially on a t34 which makes good low down power

i dont hold out much hope for mine tbh
and nomatter what turbo i would never take hyds over 7800 as you said its more due to heat and oil that causes them issues, they sound like they are empty