Hello everyone i installed a Holley red Pump on my truck saturday. When i fired her up it takes it a bit to get to full pressure is that normal, what i mean by that is it will go up to about 10 psi, and then top out around 17-18 psi at an idle. But when i get all over it its still getting down to 1-3 psi a WOT!!! I thought installing the pusher pump would eliminate that. Your input would be greatly APPRECIATED!!!!!!!!!!!!!11

 

Did you change your filter? Also is your guage set up with a needle valve? When all is ok with my truck the pressure comes up quickly. When I noticed it coming up slowly it was because the needle valve to guage got bumped and was shut off. When the pressure drops off that far it is most likely a bad pump which you have changed or a restriction in the fuel lines. Something in a banjo or a clogged filter assuming your guage is plumbed after the filter. Good Luck.

 

Yes i changed the filter when i installed the new pump, both the LP, and the holley r running in cycle. I dont understand the needle valve thing, my fuel pressure gauge is on my edge box. Not to sound stupid what is all this talk about a banjo? If it could help me please explain!!

 

I think your problem also has to do with flow. The Red pump flows 97GPH, which means when the VP44 is a WOT it is drawing a lot of fuel, the pressure you see will drop also. A higher flow pump like the Black pump which is 140GPH will flow more, and thus at WOT the pressure will not drop as much because the fuel pump can keep flow to the VP44. (assuming there is not an increase in restrictions)

Although PSI isn't necessarily a measure of flow (which is important), you can analyze flow issues, by how much the pressure drops off idle. The more it drops as you increase throttle...the less flow you have up to the VP44. Increase volume to the VP44 and the more stable your pressures will be.

This is why a big line kit will keep the pressure more steady...beacuse it is more capable of maintaining the flow to the VP44. (by removing restrictions between the tank). Thus, as the fuel demands of the VP44 increase the flow is there to match.

Dirty filters, banjo bolts, and small fuel lines all increase restrictions. Removing restrictions will give you more steady pressure.

 

Those of us who run a mechanical gauge use a needle valve to reduce the flow to the gauge itself...in the event of a failure or emergency, you can shut off the fuel to the gauge...safety.

With banjo fittings, the fuel has to flow through holes drilled in a bolt. If those holes are small, they reduce flow. they aren't necessarily as efficient as your standard hose barb.

 

I think that im gona put a big line kit on her, were can i get on in a hurry, and about how much? Probably gona switch to a blue pump!

 

If you go to the "great deals" section of the sice and dodge performance...fuel systems...there is a bigline kit in there. You can do the whole system, or just the line from the Filter to the VP44

 

Have you tried checking that your electric sending unit is accurate using a mechanical gauge? Could be as simple as that.
-P

 

Ok i called glacier diesel this mornin, ordered i big line kit from them, was only $70.00, and im gona put on a holley blue saturday with the new line. Do i leave my stock LP on and run them both or not?

 

I took the stock LP out of the loop. It is hard to get to, and with the new lines, you probably would want to bypass it anyway.

 

I just ran to wally world fired her up, she made her way up 15 PSI. Cruzin around town was runnin about 10-12 psi. When i went to nab on it to show some SMOKE , burried the gauge down to about 1-2 PSI *** i dont understand whats going on here? I guess i will just baby it until saturday and then see what happens, any ideas?

 

I would most definitely verify the fuel pressure with a mechanical guage

 

Holley probably can't develop enough pressure on its own to compensate for rapid fuel flow increase / pressure drop during rapid acceleration. Especially with large injectors. Big line may help that, but if it does not put the stocker back inline, two of them probably will supply enough fuel where it is needed the most.
-P

 

I still have the stocker running with the red holley, as we speak.

 

All the above applies. It's going to help alot to install the big line kit. Also I imagine that you were having pressure problems before you installed the holly. Was your stock pump bad? If so it might be causing some restriction, I'm not sure if they will do that when they are bad. As far as I'm concerned they are a waste of time - I had a couple of poor ones from cummins brand new out of the box. Good Luck