I have a 2000 chevy silverado with a 5.3l. I recently purchased a powerdyne bd11a kit and it came with a fuel management unit. I was wondering that now i have upgraded to a 255lph in tank fuel pump and 42lb injectors would i need to get rid of the fmu? Do i need an adjustable fuel pressure regulator as well?

 

Ditch the fmu and get a tune

 

Yes get rid of that and like stated get a retune done.. Good to go..

 

Check out Nelson and Wheatley on the right ====>
They are talented tuners and sponsors on here and both know their stuff real well.

 

Would there be any advantage to using an adjustable fuel pressure regulator? Needed?

 

The stock FPR should be fine. I have been running the stock one all along with the STS and hi-boost setting of 12 psi. I have been running the STS for 4 years.

 

Stock FPR is fine.. Infact I have heard of guys changing out to a diff style and the adjustable ones, have giving them a hard time.. Stocker is good..