I installed the ddrp02 on my truck and put in the spring that it came with to raise the fuel pressure. It idles at around 35 psi, before I installed the spring it idled at around 25 psi. The pressure does drop when I get on it real hard and I know I have to be concerned about the pressure being to low. My question is should I be concerned with the pressure being ti high?
Thanks.

 

That is a very debated question. How low does your pressure fall when running @ 25psi at idle.

FYI

The DDP is only designed for a Stock Truck.

 

I have the Edge juice and when I had the stock spring it would pull the pressure down below 5 at wide open throttle...at that point I let off the throttle. I use it as a daily driver and dont tow anything. It maintained above 10 as long as I wasnt wide open with the stock spring. I started to notice some hard starts with the other spring with 35 psi idle so I just finished putting the stock spring back in..I think I'll just go with the stock spring as long as it starts ok and I'll have to keep the pedal off the floor...

 

Are you sure you have the right pump cause it shouldnt be making that much pressure out of the box. All the ones I have seen are around 18psi.

You don't want the pressure to fall below 10psi.

 

Correct me if I am wrong (just trying to remember and Luke might know better), but I remember reading not to run over 25lbs. for extended periods on a VP.

 

It is 19 psi at idle with the stock spring...when i posted the original post I was thinking the psi was higher than that but when i put the stock spring back in it is actually 19 not 25...I'm hoping I havent done harm to the VP by having that other spring in..it was only in for a few days and was 35 psi at idle??

 

IIRC Industrial Injection told me when I put in my replacement Vp that they have seen best results around 18 lbs. at idle and it shouldn't go below 10lbs. at WOT

 

I ran pumps in series for 6 months with no performance problems, but the 30 PSI did pop some seals in the filter housing. I now have the FASS 150, I installed it due to future plans, and hopes it would improve truck performance. No performance changes we noticed between the two set ups.
On the down side, I now have to fill my tank full every time the level reaches 3/8th of a tank, or the sand tube will suck air during acceleration, deceleration, and hard turns.

 

Thanks all for the info...guess I'm going to leave the stock spring in so I dont have to high of pressure at idle and keep my foot off the floor to keep it from dropping to low. I would have got a fass 150 or air dog but just couldn't spend the money right now...

 

yeah i have the same fuel pump the ddrp and when the truck warms up and i drive the truck a while it idles at 20 psi and at wot it goes to 11 psi.