the SX, Aeromotive, or equivelant regulator. Is the fuel pressure setting boost referenced? Are you hooking up a boost line to the reference port on the regulator?

I'm looking to gather parts to do this myself. I hate wasting money on a kit when I can put it together cheaper. The Diesel Innovations kit shows a regulator with a boost reference port but makes no mention of hooking it up.

Would it help produce more power if the regulator was referenced to the boost? ie: more pressure during more boost?

Thanks,

John

 

John,
Ask Jtharvey about your kit. He made his kit himself as well since he wanted to do it, but I think it ended up being just as much as some of the kits out there.

 

i just finished up my fuel system tonight. i am going to do the boost reference tomorrow when i get off work. i got a "FueLab" regulator with my DI kit, but it is the same concept. it has a boost reference nipple coming out the side, that i plan to hook up to the unused nipple on my compressor manifold, because it was used for the wastegate but i dont have one

 

Thanks guys, I'll PM jtharvey if he doesn't see this. I work with hydraulics and pneumatics at work all day long so I think my "company" price on everything but the regulator will be alot less.

Kris, does your instructions say to hook up the boost port? I figure all it can do is add some power in the 100+ settings. You'd have to check it out on the road running to see exactly how much pressure is increased during higher boost.

The paperwork with most of those regulators says pressure is raised 1:1 with boost.

 

there was a thread a while ago, the title name escapes me, that discusses diaphram failure and possible consequences.

However, the thread does contain all of JTharveys results, mods, and concepts, including pressure following and upper boost.

 

Nobody's instructions recommend, or even suggest using the reference port at all. ITP's instructions actually recommend using it as a relief port in case of a regulator failure. They even go so far as to supply a dump line to run beneath the truck.

 

nothing mentioned of it in the instructions. not even saying to run a hose down the side of the truck. however i did the simple mod this morning. have not run it nor do i have an incab fuel pressure gauge (yet ) to see if there is a difference.

http://community.webshots.com/photo/...91838520HWlCjw

 

Keep us posted. Just remember NOT to run that fuel line inside the cab to the gauge. I'm sure you knew that already!!!

 

yeah i am getting all electronic gauges. i dont want any 180* water, 80 lbs of hot oil and 80 lbs of fuel running inside my cab! im doing a 4 pod overhead cluster this roundabout. my y-block has a handy port for the fuel pressure sender already in it, it just has a plug in there now. Jeremy has his gauge tapped in there.

 

Here's my thread about hooking up the boost reference line: https://www.ford-trucks.com/forums/s...d.php?t=496962

So far, I have had no problems with it. One thing I've noticed recently though, is that my fuel pressure no longer goes over 80 psi, no matter what the boost is. When I first did it, it would go as high as 90 psi. I can't pinpoint exactly when I noticed it happening, but I've got a theory that the big oil has something to do with it. I'm thinking that with the install of the twin HPOP system, the injectors are now using more fuel at higher RPMs and high boost. So, the fuel pump is feeding all it can, but the injectors are using enough fuel now, that it won't go higher anymore. Guess it's time to look into upgrading my fuel delivery.

 

Thanks JT,

It's possible that the spring in the fuel press regulator might be going soft. 90 psi is on the upper end of it's range so maybe it's just getting worn out?


John

 

I asked Aeromotive about it, and they said the spring only controls the pressure when there is no boost. So, the spring will hold it at 65 psi with no boost, which is where I have it set at. It's purely boost pressure itself that is supposed to raise the pressure after that. My other thought is that I could have a boost leak in the tube from the manifold to the regulator, so I need to check that. I may also try to crank up the baseline pressure to about 85-90 psi and see if there is a pressure drop at high RPM & boost, which would indicate more fuel being used. I wouldn't leave it at that pressure, but just do it for a little bit to test.