Here is a idea. Is it posible (obviously you would have to do fuel, intercooler ect upgrades) but can you do a non-seq system with say 2 t-78 turbos? or if t-78 is too big t-58 turbos? Wouldnt this produce some good power or maybe even a t04 and a t-78 so the t04 can help spool quicker.

 

Don't bother, it's a waste of time and $, that's why everyone just goes with a single turbo, as far as the notion that 2 turbos that equal the effeciency of a big single spooling faster, that's not true, cfm is cfm no matter how you put it. The complications of 2 turbos(manifold, 2 gates, extra piping, etc.) isn't worth it. Also you can't run 2 different size turbos non-sequential properly because at one point one turbo will have less effeciency than the other and will cause a bottleneck in the system. Just my 2cents.