" My goal is to be able to run whatever turbo I get on low boost (15-18psi) on the road course and have it be nice and responsive and maintain torque to redline, while making 450-500rwhp. On a road course you do a lot of 1-gear pulls, where you pull from say 4000-7000rpm, brake down, and do it again. I generally short-shift at 6000rpm, but in a lot of cases, I'd shift then immediately brake and have to downshift again; not worth the shift time, so I wind it out. But of course, the N54 falls on its face after 6000rpm or so. So I want something that'll keep the boost up and the torque flowing to redline.

More than 500rwhp I don't think would be terribly useful on the courses around here without very serious chassis mods to fit wider tires and significant downforce, so thats my engine goal. I want it to be reliable and consistent at those power levels and not be working its ass off.

So a medium size single or twins would be ideal, I think. But right now the setups just seem too "fragile" for lack of a better term. I want to simplify, simplify, simplify. "

" Terry, would it be possible to use the JB4 with no bias on any inputs/outputs, solely as a boost controller? And would it be further possible to use the Req. Boost values (or wgdc) from the DME to set the boost control point?

In this way, would it be possible to run external wastegates either on a single or twin turbo N54, because the DME is getting the boost it asks for; just not in the way it thinks? And the DME could handle fueling/timing completely through the flash via Cobb/whatever. Understanding in this scenario that you'd be sacrificing any of the map-switching and auto-tuning benefits of the JB4, and you'd have to re-flash to change boost settings. Essentially, the JB4 would be doing nothing but replacing the idiotic stock boost control system on external wastegate systems.

Is this a mode that could be programmed and sold by you on the JB4? "