Turbo for DSM, that makes full boost from 4000-8500+RPMS?

[Murlo26]

I would look at the new PTE5862 from precision, not sure it would flow all the way to the top like you want though, but on a 2.3 or 2.4 the spool would be awesome. The 6262 is laggy though, which is why I didn't say that.

Honestly, my favorite turbo in that range, although expensive, is still the HTA3582.

That would probably do what you want with ease.

Otherwise look into the new EFR line from borg warner, also expensive but supposed to be uber spool and top end.

I am simply suggesting the ones that spool well still and make good top end, not caring about price.