So, I got this 350 and I got a turbocharger (2008 Ford Super Duty 6.4 series-sequential turbo system) and I'm thinking about marrying the two. I'm a "turbo-virgin" and have a lot of questions, Can these two work together (gas engine/diesel turbo)? The varible pitch part of it need a throttle position senser to work, the SBC is carbed?

Here's a link to the turbocharger i've got...
http://www.dieselpowermag.com/tech/ford/0708dp_2008_ford_superduty_turbos/index.html

Okay, turbonuts..... how do I makr this work?


Thanks,
Fat50  

First thing you'll need to do is lower the compression on the 350 to get the most form the turbo. You want about 8.5:1 net compression so you can run the most boost from the turbo.

From there, I'd look at converting the motor to fuel injection.

As for hooking up the system, that one's a little beyond me, I'd recommend posting ot the turbo specific forums and asking guys who have more experience with that.  

WOW! A 6.4 sequential turbo "set" to play with!  I don't even have any compressor maps on those turbos yet!

This set-up will present a much steeper learning curve than adapting a "single stage" conventional turbo (i.e. an older PSD turbo) to an SBC.

I haven't tried adapting a VATN (variable area turbine nozzle) turbo (or as Borg-Warner calls it Variable Turbine Geometry) , so I can't help you with the control strategies, other than to suggest that you gain a good understanding of how it works on the OEM application and come up with a simplified mechanism to adapt it to the gas engine.   It would seem that the VATN needs to be responsive to MAP and RPM, not throttle position, though.  The "high pressure" VTG/VATN turbo will need to spool quickly (small nozzle area on the turbine) at low r.p.m. The turbine nozzle then needs to "open up"  to slow the turbine speed as the manifold pressure and r.p.m. increase.  

This system will require serious intercooling because feeding a turbo into another turbo will significantly increase the gas compression heat (at least once the big second-stage turbo starts compressing). That means you'll at least be blowing through the carb (intercooling with a draw-through is not recommended and I have no data on whether the seals on the'08 PSD turbo "set" will tolerate an air-fuel mixture)

Also, the manifold pressures of the PSD are significantly higher than you can run on pump gasoline, so I suspect  using the '08 6.4 turbos on a blow-through gas engine will require alcohol fuel enrichment under boost, water injection and/or careful wastegate management.

For someone just starting out with turbos, the '08 PSD set may be somewhat complex.  

The basics of turbocharging are covered in a number of good books (I think some of these are listed in the We're not Rich but We're not stupid" thread. If not, look for these turbo books (in no particular order):

Turbocharging Performance Handbook, by Jeff Hartman (MBI Publishing, 2007, ISBN 978-0-7603-2805-7)

Turbochargers, by Hugh Macinnes (the classic in the field and still the best on blow-through carb systems)

Maximum Boost: Designing, Testing, and Installing Turbocharger Systems by Corky Bell (better on fabrication than Hartman, but not as up-to-date or as easy to read and often too opinionated)

Forced Induction Performance Tuning: A Practical Guide to Supercharging and Turbocharging, by A. Graham Bell (expensive, but very comprehensive)

Street Turbocharging: Design, Fabrication, Installation, and Tuning of High-Performance Street Turbocharger Systems, by Mark Warner, P.E. (more oriented toward small shops and home-builders and includes lots of case studies).

Let us know how it goes.  

I think this project is a bit like learning how to fly by someone giving you a B52.

Not impossible, but a stretch even for a seasoned turbo-crafter.  

try this place...gobs of info..even if theres a clique there...great knowledge base....

http://www.theturboforums.com/smf/index.php


al