My next setup will be a second gen with a dead regulator. My low pressure one will not keep up with my 6x16's. It doesn't go to 0 but I can draw it down to 3. I think the bigger piston in the second gen would help GPM wise. I also wonder if you could dissasemble the second gen one and alter the spring to lower the pressure that way. Maybe heat a section of the spring or something like that.

 

Around 45 psi.

 

Ok, so a low pressure lift pump won't support 6 x 16's? How big of injector will it support?

 

I found that POD's and a LP piston lift pump worked OK together. Still had about 8 psi at full fuel.

 

POD's? What Else?

 

The usual VE tweaks.

 

So with lock tite on the front seal and a HP LP dose anyone think it will hold?

 

Where are you guys getting your low pressure piston pumps? I looked and I can't find any.

 

I got my stuff from Case IH, but it was expensive!

 

Ok! So here is my situation.............

I have a high-pressure piston lift pump and want to use it on my 93'. I have been reading all of the threads concerning piston lift pumps, pressures, and how to install them. The thread/sticky that BC847 did was a low-pressure pump from the start............what about a high pressure installation with regulator??? I'm getting confused because some mentioned having to have a boost ref regulator. What is that???? My biggest question is: Does anyone have pics of a high-pressure piston lift pump w/regulator setup?? Thank you, just trying to clear some confusion up.

 

I don't have any pics But. You do NOT have to have a boost ref reg to run a high pressure pump. You need just a regulator. All the regulator is doing is stopping the high pressure from reaching your injection pump. The lift pump outlet will go to the regulator. The regulator is set at 12-15 psi. The extra pressure is sent back to the fuel tank via a line you will need to install (or tap into your return fuel line).
The boost referanced regualtor is used for more fuel pressure to the injection pump. It uses the turbo boost as a referance. So It know when to give the injection pump more pressure. So lets say you have the reulator set a 15 psi. The regualtors raises on a 1:1 ratio. So when your turbo is putting out 10 psi then your fuel pressure would be at 25. Make since?

 

Ok, that makes a little more sense. Where is most folks buying their regulators? Where should I tap into the return line to relieve excessive fuel pressure? Again, some pics showing the setup would really help!

 

With the piston pump you can use a deadhead regulator, no need for the bypass. Just make sure you plumb it in AFTER the filter. The house brand unit from Summit or Jeg's would probably work fine.

The other way you can do it is with a pressure relief valve like my Walbro is plumbed. The relief valve just dumps excess fuel pressure back to the tank (I ran a separate return). Vulcan used to sell one, mine is from GDP.

 

I will probably go this route stated above. So...... from the filter to the injection pump you can use rubber fuel hose? Basically run a deadhead regulator between the fuel hose run? Still wanna see pics of this setup.

 

Yes, run hose from the filter to the IP and put the regulator somewhere in that section of hose.