Quadzilla is right - it's the same as all the HP claims from all the other mods. If you added up all the "claims" for what I have done to my truck - you'd be up in the mid 400's. It does NOT work like that. ON THE OTHER HAND - with everything I have done to my truck working with my chip (on my 125 setting) - I dyno'ed 307HP - so my chip actually really IS giving me very close to the 125 it claims. I would bet that no matter what higher settings I would get on the chip - I couldn't gain much more power. I feel I have reached the limits that Quad is talking about.

 

I am running 4.09 gears However I also have 36 x 14.50 x16.5 on the truck.
my buddy with the Dodge/Cummins also has 36's and a 3.something gear in his.

 

You've also got a more usable power band than the Cummins. Once you get comparable horsepower, you'll walk away from him.
In regards to "split-shot" injectors, those are the ones you'd need for your SuperDuty. Single shot injectors were what was used on the original 'strokes, like mine.
You asked which ones would be best for you. You're asking the wrong crowd. Call Jonathan at Swamps, and discuss it with him. He's not only got your answers, he's got your injectors.
Catman- you said:
Your truck, in stock trim, probably dyno'ed in the 220hp range, so you're not really getting the full 125hp the chip claims.

 

Thanks Quad I give him a ring on Monday!

 

I wish I had dyno'ed my truck when it was stock - just so I'd know how much I've gained. I was under the impression that a stock PSD actually put down a 'tich under 200 RWHP on a dyno....

 

That's true of the original body style trucks like mine. They dyno anywhere from 175-195 when stock. Mine must've been in pretty good shape, since mine did 194. The SuperDuties are normally in the 200-220 range.