I have heard of people running a lot of boost on the stock injectors, but I know that that must be maxing out there duty cycle so I went witht he 55lb injectors. Also I felt like if I was going to do any more modding to the car getting it any more HP that I would have to have the injectors sometime so its better now than taking off the blower to do them.
Correct me if I am wrong, but you should be able to run the same boost levels with the KB as you can with the eaton. One Blower is just more efficient...........
The Eaton is just using up much more of the HP because of the design...
When you throw in the boost a pump (extra safety), I would think that you could run the 15-17 lbs with a good tune safely....