How much boost are you running now?  Are you able to run full throttle, or are you having to limit throttle to limit boost? 

 

At full throttle I can spike as high as 9psi, but it will maintain 7psi. Maybe tomorrow when above 10K I may try my actuator bleed valve to increase the boost a little.

   

 

 Since the Turbonetics unit is far superior for our needs, choosing it is really a no-brainer.    

 

 My main concern with using an aftermarket turbo is the oil return. The stock TG uses gravity, but I'd expect an aftermarket installation to be mounted a little low for this, requiring a scavenge pump......   yet more weight & complexity