tim... you never told me the tracking numbers of the stuff you sent me.... when will it be coming in..?

m

 

ACP,
I'm interested in a stock fpr plug. How much are they and when will they be available? (When can they be shippped)

Thanks Mike & ACP for your detailed descriptions.

 

Tim..i'm interested in the stock fpr plug as well. Please let me know how to get my hands on them.

Thanks In Advance,

 

ACP, sent you a PM about some stuff.

 

Not to get too cheesy, but you guys are my heros. Seriously, I love to see people doing the whole Star Trek thing with this platform (boldly going where no one has gone before).

--Steve

 

ACP,
I have been reading your post but didn't realize that you had extras. That is all I need to finish and have been looking at several different options. If there are any left out of the original order then please count me in? PM me for the price and info if you can. Thanks for your research and keep the good post/pictures coming.

Thanks,
MIKE

 

You guys don't need to run a return line for fuel pressure adjustments unless you intend to run less than 3.5 bar.


Here are some links I made on the subject 2 years ago.

http://forums.maxima.org/showthread....hreadid=123025

 

SR20DEN,

In your diagram, you show a return line back to the "high power fuel pump". The doesnt have a return at the tank or pump at all. it has a POS in-fuel-pump-assembly- fuel pressure regulator that dumps fuel at 50psi..but cant keep up with the Walbro 255.

On our stock returnless system....there is only one line coming out of the tank...at it heads to the fuel rail. There is nothing at all coming back to the tank.

Did I miss something?

PS I am moving to Charlotte in 4 weeks from LA...see ya soon!

 

Any more news on these stock FPR plugs? Cost and when they could ship if needed them?

 

Im not fully understanding what you're trying to say. I only show one feed source from the tank which is at 3.5 bar. My setup uses two Tees, one inline booster pump and one in line FPR that dumps the excess back into the 3.5 bar feed line. I know the diagram may look odd but trust me the setup works.
Although I no longer use a dry nitrous system so I don't have a need to boost the fp.

 

the fpr plug and fuel rail adaptors will be ready in 2-3 weeks
approx

 

I found another way to plug the stock fpr. Thanks anyway ACP.

 

There is couple problems with your drawing...
Your setup is usually to change from a carb setup to modern fuel injection since Carb fuel pumps are usually low pressure type. With this setup you can supply the engine with high pressure.
Your setup also are commonly used in a sump setup to prevent fuel starvation during cornering, braking, and start up.
Plus, in your drawing, you forgot to add a surge tank so you can dump the excessive fuel back in it and feed it off again from the bottom with the high pressure fuel pump. Here is where your problem is. Even with a surge tank, what you do when the surge tank is completely full and no where to dump the fuel back to the tank? The fuel will pressurize the low pressure feed line again and again making the setup useless except you now have two fuel pump pumping fuel. Either way you need a return line to dump fuel back into the fuel tank or might as well ditch this setup and just start adding multiple fuel pump if that's what you are trying to do.

 

There is another way changing from returnless to fuel return setup.
Use the same Aeromotive FPR. There is two side ports and one return port on the bottom. Total three ports.
Cut the fuel feed line in half somewhere before the rail. Stick the Aeromotive in between the cutted feed line using the two side ports so you are feeding fuel into one port and out of the other port into the rails. Use the bottom port for return back to the fuel tank.
This way you use less fittings, almost no stainless lines except for the fuel return and no welding are required.
You still have to get rid of the stock fpr in the back and change to walboro 255HP. My suggestion is only toward the engine bay fuel setup.
This may be a little hard to understand but the After market FPR that have two side ports are not dedicated as where it mounts before or after the Rail. Basically you can feed fuel through it and excess pressure can be return fuel from the bottom. You can return fuel into one or both side of the side ports and return from the bottom. You just cannot feed fuel into both port at the same time as there is no point in doing so anyway.

 

Here's some food for thoughts....
A fuel returnless system. I WOULD think the ecu can detect a rise in fuel pressure to throw a check light since this system need a very steady preprogrammed fuel pressure so it don't have to return any fuel back into the tank. Now you make it into a returnable fuel system. If the fuel pressure stays steady at factory spec, there may be no problem. But if you raised the fuel pressure and the ecu can in fact detects that, wouldn't there be a problem? By using a after market 1:1 fuel pressure regulator for boost, every pound the boost rise, the fpr will also raise the same amount of fuel pressure to compensate for the injector. So when you are running 20 pound of boost, you just added 20psi more on top of your base fuel pressure. That's 20psi of fuel pressure the ecu detects and throw you a code.
Like I said, i am not 100% sure if there is a fuel pressure sensor mounted somewhere alone the fuel line that ecu reads from so what I said above might not be a problem.
A good example would make my claim false is Vortech supercharger set up since it uses their FMU to rise fuel for enrichment which did not throw a light or given the ecu a hard time.

 

Oh btw.... I love fuel system setups. It's the most important aspects in your turbocharging. Get it right and you are a happy camper. Have a good time turbocharging!!

 

The stock FPR is in the fuel tank.
The main feed line is used for the purpose of feeding and scavenging. I have already said that I have proven this setup works just fine. It's quite simple, there is no need to make it look and sound more complicated than it really is.

The Nissan ECU does not read the fuel pressure.

 

when it's done and working will you put out a DIY kit or instructions?

I love DIY stuff

 

Edited: All i'm trying to say is if you aren't scavanging the fuel back to the fuel tank, your setup is running crazy amount of fuel pressure to your injectors. It might work but not for long until the injector fails.

BTW: I was lazy and didnt' read through the entire thread.
GQ_626 has the same idea as what I wrote about sticking an fpr in between the fuel line before the rail.
ACP's way is to supply both rail with equal amount of fuel and make it returnable. More work but much safer for high boost.

 

Underterminable number? Did you not see the inline FPR? Everything is coltrolled and the FP is set to the desired amount. However that diagram is for a passive booster pump that would come on only when needed. An active setup for FI would replace the FPR with a FMU.