How do I increase the FP. I thought I read about adjusting the spring. Anybody know where the thread is? Or can anybody tell me how to adjust the FP up?

 

want more pressure? buy a nice mechanical lift pump and forget about the FASS/Airdogs. They always or will break eventually

 

so... how much is enough pressure? If you really want high pressure just install a second injection pump between your current injection pump and the tank... LoL

if you have a constant 12-15 psi at any throttle and load then you have enough... why does everyone want more, bigger, faster, taller, cheaper, easier, tougher.... when what you have works great? (I don't imply the stock lift pump is sufficient or reliable either...) Keep in mind if you pump over 30 psi, you aren't doing any better.

LoL

 

I will try to actually answer your question...instead of telling you to buy something else!
I dont have a FASS but I believe you can either stretch the spring that is behind the return line fitting...or I think FASS dealers have shims/washers that put more pressure on the spring to create more PSI.
no need to buy a whole new system if all you want is a little more PSI

 

Hey thanks 53. I will give it a shot.

 

You have to change out the spring for a different one. I stretched my spring and it did nothing. I think they have stiffer springs for more pressure. Get ahold of your FASS dealer or Diesel Dan on here and they will hook you up. Your wasting your time trying to stretch it like I did. I hope this helps some.

 

Yes it helped. I am ordering a new spring. Thanks

 

Pardon?

 

Right on..

 

On my Holley Blue, I added a ball point pen spring inside the stock spring set for 14 psi and with double springs, pressure shot right up to 46 psi or so. I quickly shut down and removed the "double trouble" dual spring contraption and stretched my stock spring to a healthy 18 psi.

 

order a spring