[CoyoteCody]

How would you make the factory fuel reg stay opened up all the way where I can use the airdog2 reg only. I know the blue spring goes to 70 but over time will get softer.

 

[paintingman]

You can do whats called the BB mod the were you take a BB from a BB gun and put it behind the spring that will make more tension. The air dog II max pressure is 75psi i have also heard the some of the aftermarket springs that you can get will give you 90psi with the stock pump. I believe that is to high 70 to 75psi is more than enough if you were going to race it then more than 90psi and a regulated return and this http://uintadieselperformance.com/Superdog.html 250 would be what you need.

 

[CoyoteCody]

have airdog so just want to be able to get max with it