hp piston pump with boost refrenced reg??

[rattlebox93]

ok i just decided after all the jackolagy i just went to orileys and bought a good delfi high pressure piston pump and a aeromotive 13301 boost refrenced regulator ok so my questions are

1. do i have to run the fuel filter between the lp and ip?
2. how are you guys using the boost referance its 1:1 and will go up to 20lbs if just hooked strait up to manifold pressure so leave it un hooked?
3. is 1/2 in line to much for the suction to the lp?
4. where do u normally run the fuel press at an idle and how do u let the reg work if using boost refrencing?
5. any other tips that u could see beeing helpfull would be great!

thanks a ton dj

[PToombs]

1, absolutely! And you should have a strainer or filter before the LP also. It doesn't take much dirt to scarf the piston and your pressure will go bye bye.
2, ?
3, 3/8's is good, 1/2 is great!
4, mine idles at about 15psi.

[rattlebox93]

2. it has a 1:1 boost referance meaning for every 1 lb of boost the fuel pressure will go up 1 lb meaning if i have 40+ lbs of boost the fuel pressure will go to the moon so i guess i will just not hook it up to a manifold pressure source and set it at 15psi ideling.......also will turning down the lf pressure effect the performance in other words can it be used to tune the truck down just like backing out the fuel screw or do i just set it at 15 and forget it?

[BC.livewire]

start with 15psi

as far as I know 18psi is the max --- aney more the seals in the VE pump will pop out

[lectro_static]

Use the boost reference, yes it WILL go up at a 1:1 ratio but under load there is more call for fuel so you need more fuel pressure. If you search on this board I believe KTA said he gets up to 70psi of fuel.

[Mark Nixon]

What about fuel pressure in relation to the mechanical timing?
I've heard anything above 8 PSI in supply pressure starts to affect it.

I've mentioned this in other topics and noone ever answers my concerns about it.

Mark.

[lectro_static]

What about fuel pressure in relation to the mechanical timing?
I've heard anything above 8 PSI in supply pressure starts to affect it.

I've mentioned this in other topics and noone ever answers my concerns about it.

Mark.

That I am unsure of, I would think that it would remain the same but dont know how to explain why. BC847 or KTA someone with more knowledge then I would be the one to explain it I think.
I am curious about line size, moving to 1/2" lines gets more fuel as we all know BUT the line sizes are meant to keep pressure up in the IP so when you change line size allowing for more free flowing fuel it would seem to me that it could/would cause some issue with timing. Any thoughts on that?

[rattlebox93]

the 1/2 in line is onlt on the suction side of the lp from the lp to the ip i am using -6 an braided stainless line

i am using a 10 micron filter on the suction side and a factory filter on a homemade remote filter mount not on the stock thing in the head so i think that should be good as far as filtering the fuel so i guess we will see how it works out

[ahale2772]

my seal is holding steady at 10 psi idle and 25 ish at wot, there is no real definite limit to wear the seal will pop out but i have noticed that i can build 30+ psi of pressure after the filter when i let off of the throttl equickly after wot, motor is still spinning, pumps making pressure IP dosent need it

[rattlebox93]

i think i will just use it as a regular regulator for a while and just keep it at about 15 psi steady untill i get the motor broke in and them mabye try using the boost referancing when i actually put a tune on it and shoot for some numbers

[GLHS]

I think around 6 or 7 lbs of pressure is when timing begins to advance, so guys like me/us are not getting the full benefit of retarted timing when we all have our 15 psi pumps.
Question I have is how much pressure and/or rpm before timing is maxed out?

If your going to run a rising rate regulator, I would start @ 5-7 psi then let it go from there or, if you are worried about popping a seal out, use a bleeder screw on the boost reference line to the regulator so it does not rise at 1:1 ratio maybe only 1:1/2. One pound of boost to 1/2 pound of fuel pressure.

Another question; can the inlet hole into the injection pump be drilled out? I think it is only 5/16". If it is possible, would it do any good to drill it out to 3/8"? That would be about 43% larger.

[91_CUMMINS]

I'm getting a HPLP off my buddy and need to know what exactly I'll need to complete the install. If someone could make a list or me that would be awesome! I hve an idea but want to have all the parts ready before I tear it all apart.

[91_CUMMINS]

I wish I could just bold te HPLP on but I doubt it's that easy! If I don't care for the boost refrence is there a regular regulator I can buy that would be any cheaper? As long as I have atleast 15psi at idle I don't care about the rest. Either way it's going to be alot better than my setup now I believe.

[Remps]

There is a "front pump seal" post on page 6 that has a bit of info on the enlarged fuel inlet.

[Douglas]

hey-Hey!!!,
Seems it would be prudent to run a pair of regs. One to set the max and the second( closest to IP ) with the boost ref'd regulation. Set the first to what ever you decide is safe( and with a snap-ring'd seal that could be substantial ), and the second much lower and able ro tise with boost.

I just put in a Holley Blue and was quite suprised by the drop in high-fuel-demand smoke. I re-turbo'd the motor with an HX35 and lost a lot of smoke...though it was still there at higher RPM and throttle. This morning with cars behind me in the dark it was much reduced. No reg after the Holley.
cheers,
Douglas