by DMan1198 » Mon Dec 21, 2015 11:43 pm
It isn't just the housing that determines choke point on the turbine side. The turbine wheel plays a big role in that as well. As an example on an s400 the 83/.9 turbine side is capable of supporting 900whp while the 87/.9 turbine side is capable of 1150+whp, and the turbine housing is literally the same size.
if you consider where turbo technology is at this point making bigger power with a big single is easier than ever. There's the new s369sx-e that flows 98lb/min of air on the compressor side while its redesigned 80/74 turbine wheel responds better than its predecessor (I ran a charger with the old wheel, and it really is lazy) of course the math puts that 98lb/min compressor at supporting 900whp which is a little overkill for our ve's, but there's also a 364sx-e and a 366sx-e which still flow a lot for their size, and the material the wheels are made of is tough. They'll handle o-rings with only slight nicks. I haven't done any research on the internal gates in a very long time, and I run my 6.7 non gated, so I can't really comment on the whole internal gate restriction thing
Ducati- professional nap taker, and thread derailer extraordinaire
Brownie: 80 dodge heavy half. Ghost cummins under the hood, and some sinister plans
The Roo Hunter: 93 w250, lifted, 2 whistle machines, and a bunch of other go fast goodies, uhh..... not there yet
Jaeger: 12 ram 3500. Lifted, exhausted, and fed an excessive quantity of air
The Huntress: 02 Jetta TDI. No muffler, egr, horsepower