I read about the Fass DDRP-02 lift pump. The specs say It will pump 89 gph at 23psi. Is there a flow adjustment **** on the outside of the pump or do you need a pressure regulator to prevent damage to the vp44 ?

 

there is no adjustment you would ahve tyo replace the spring inside and dont wast your money get a raptor 100 or 150 for 390 bucks.

 

I second that. I had the DDRP doesnt hold the pressure up, now I have the Raptor 150 and love it. Save money and get the Raptor.

 

Ive got the DDRP02 and it wont run at 23 psi.
Mine sits right at 20psi at idle and under steady load around 16-18
Under wide open throttle stomping the pedal will drop to no less than 13 psi.
Depends what you are going to do with your truck. If youre going to replace injectors or run a wicked tuner than absolutely look into something that will move more fuel.
If youre keeping it somewhat moderate like less than an 80hp tune than it should be fine.