I have not turned up pump or timing. I plan on doing that prior to spring camping season. From what I have learned on this site, I will achieve approx 200-220 hp with pump and timing tweaks included. From what I have read on HTT site to much boost can be bad also. I have stock 518 and do not want to go beyond 240-260 approx hp. However, I want to keep egts as low as possible also. Which one would you recommend. Thanks

 

i would go with the stage III. I see from you have the 190 injectors so i would go with the bigger one. And i think that are the same price if i remember right. With 250 hp you will have enough fuel that the bigger compreser will do just fine. I have the Stage III and love it.

 

Don't waste money on the Stage II, get the Stage III. 190's are enough fuel for it.