I want to go with the BD twins but don't have enough money yet. But I need more air now, so I am going to buy a single. I am going to step up to mach 6's when I get the larger turbo. And eventually add a smarty. Right now with my Hx 35/14 cm housing on level 3 sub level 4 on the edge I can spin the tires in first and into second gear. I also see about 35 to 40 psi of boost. I want to be able to spool the new turbo like like the Hx35 spools. Is this possible? I like the power right off the line.

 

With the hot juice and the Mach 1.6's you will have no trouble spinning that Super B turbo! They spool fast... at least mine does as the secondary in my twins! It should go straight to 40 psi (wastegate setting).

Mach 6's will send EGT's through the roof with that turbo/box combo. I would wait on them till I had the twins.
JMO - RJ