VF36
Roller bearing version of the twin scroll VF37, also has a titanium turbine and shaft for even quicker spool. Same compressor housing as
VF30/34, however twin scroll P25 exhaust housing provides slightly better top end output due to reduced exhaust pulse interference. This turbo is good for 400HP and used on JDM STI Spec C from 2003 onwards.
VF37 (thrust bearing)
Enter the age of twin scroll IHI turbos. Same compressor housing as VF30/34, however has a new twin scroll P25 exhaust housing that provides slightly better top end output due to reduced exhaust pulse interference. Twin scroll also provides better spool up for improved low down response over the VF30/34. This turbo is good for 400HP and used on JDM STI from 2003 onwards.
Basically it has a similar compressor housing to the vf22 but spool can't be esitmated. It depends on so many things, IC piping size, BB or thrust bearing etc.
A couple of links that may help
http://forums.nasioc.com/forums/show....php?t=1089287
http://forums.nasioc.com/forums/showthread.php?t=769474&highlight=vf36+dyno