Im a newbie to Turbo, and im hoping with enought money, ill end up setting up my own kit in a year or so. Im currently studying engineering at Maine Maritime Academy, so its kinda related to the stuff im going to school for. Anyway, i was wondering if it would be more beneficial to get a stand alone FMU with a built in fuel pressure regulator, or more cost effective/just as simple to get the fuel pressure regulator and the fmu separate. And correct me if im wrong, but the fuel pressure regulator regulates base fuel pressure while the fmu adjusts fp according to boost using vaccum. Thanks for any info, im just trying to get stuff all put together for a custom kit and work out as many bugs as i can to try and get the most efficient kit possible. Thanks.

Brendyn

 

Yeah, the FPR just controls the fuel pressure under N/A conditions. The FMU only comes into play under boost, with the exception of Bell Engineering's unit, which has an adjustment to increase fuel pressure under 0 vacuum, as well as one for boost conditions. I have a Nismo fpr, which is very nice since it bolts right up in the factory location. I would assume the VQ's fuel rail is the same as a VE's, so that could be an option for you.

 

Yeah i was looking at Bell Engineerings fpr, but ill keep the Nismo one in mind too, sounds like a pretty simple set up. Thanks.

Brendyn

 

I believe the Vortech Super FMU will control base fuel pressure in addition to raising it base on boost. I would rather have one unit that did both instead of two seperate ones for simplicity reasons. Trust me, you will have enough different aftermarket parts installed, being able to kill two birds with one stone is a beautiful thing.

 

Yeah, i was thinking that as well. So far i like the Bell Engineering stand alone FMU and i have heard a lot about the Vortech so that must be pretty good too. I have another question that i can seem to find the answer to and if its in the stickies i may have overlooked it. Anyway, could someone explain this....disc thing i guess that goes in the Vortech unit that gives it (im assuming) some type of different pressure ratio. I am curious about this because to my knowledge, the Bell Engineering one didnt mention this type of disc.

Brendyn.

-dont mind me, ill probaly be trying to pick your guy's brains quite a bit from now on so i fully understand the set up and minimize making bad choices.

 

Acutally I have both the Begi FMU and Nismo. The Nismo regulator is just a stock replacement that is adjustable to compensate for a high pressure fuel pump, etc.

Yeah, the vortech uses discs to increase the fuel pressure. I'm not exactly sure how they work, but they do go inside of it. The Begi FMU doesn't use discs like you said, it uses a little **** that is adjusted by hand.

 

Here's a link to the Vortech FMU recalibration doc for an exploded view:

http://www.vortechsuperchargers.com/...fmurecalim.pdf

 

The Nismo FPR, is it the same one listed here:
http://www.i-m-racing.com/nifuprre.html
Or do they have different models #'s?

 

Looks to be the same as the Nismo fpr on ebay.

 

ok fpr is fuel pressure regulator. what is fmu?

 

http://www.vortechsuperchargers.com/.../fmu_sfmu.html

 

You happen to have a pic of that? It's exactly what I want to do to control my base fuel pressure. Were you able to find it for less than $100 anywhere?

 

Hey Jeff
Here's the Nismo fpr:

 

hehe Thanks. I was looking for a pic with it installed on his VE30DE.

 

FMU = fuel management unit = adjustable rising rate FPR

there all the same

 

this is where i bought mine

http://performancenissanparts.com/ca...products_id=96

the only thing you might have to do is extend your fuel line but it fits fine and works just like it should

 

I think some of you are getting the regular Vortech FMU and the Super Vortech FMU confused.

Regular Vortech FMU only raises fuel pressure under boost, not base fuel pressure. Different disks are used to change the rise rate of the fuel pressure, like a 10:1, 8:1, 6:1......The unit must be taken apart to change the disks.

The Cartech FMU is one step better in that no disks are need to adjust the fuel pressure rising rate. A screw on top is used to bleed the boost signal it gets to adjust the fuel pressure rising rate. So the Cartech can be finely tuned much more than the regular Vortech unit. Base fuel pressure still can not be adjusted

The Vortech Super FMU is even one step better than the Cartech in that an adjustment screw is used instead of disks and it also will control base fuel pressure. Best of both worlds. No need for an FPR with the Super Vortech FMU

 

the nismo fpr will not fit onto the vq due to placement of the tb.

I may have one of sx7r's off rail fittings for sale soon. I'm thinking that I will sell the one that converts your line into -06an ss. It will fit ve, vg and vq engines. vqs will nee a 45 degree swivel hose end in order to clear the tb.

 

I'll get a pic tomorrow for you Jeff. Ebay would be the only place to sell them for cheap, I bought mine from Courtesy for just over $100.

^^ I stand corrected

 

So will the Nismo FPR fit on my 5th Gen? If not, what else would you recommend?

 

Can we not just snip the hardline and crimp in a ridge for the line to grip on to? That would be ideal.

 

Ok, just checking but i was reading about Bell Engineerings products, and while they have an fmu that just raises pressure through boost, they also have another one that does the same thing and regulates starting pressure. It goes for about a hundred more and to me it sounds just like the Vortech super FMU.

 

i hate that it would take a road trip to show you everything.

this is a direct replacement for the part where the stock fpr comes off the fuel rail. some people have hollowed theirs out instead of using the fitting, but this way looks simpler.

MX-Is the bell engineering products in reference to corky bell?

If so, it should be a good product. Do yourself a favor and pick up maximum boost by him. It will give you a great base to start from.

 

Thomas Chen sells an inexpensive fuel rail fitting or adapter that allows the use of just about any FPR in place of stock one.

I don't remember exact price, but it's under $10.

 

Alright, ill try and get a hold of that book soon. This is the info on the web site for the stand alone FMU.

Multi Role Regulators
The new Multi Role regulator from BEGi is designed to provide complete adjustability to your fuel injection pressure. The MR series takes all of the features found in our rising-rate regulators and adds the extra functionality and convenience of allowing you to adjust your base fuel pressure (the fuel pressure at fuel rail during idle conditions). This allows you to replace your factory fuel pressure regulator with a fully adjustable, easy to mount, single unit.
Patent Pending

Price $349.00 (Brackets and fittings included)

 

Is that another FPR on the other end of the fuel rail? It looks similar.

 

Here's a pic of my Nismo FPR installed (on a VE30DE). I removed some of the metal fuel lines, so thats why the hose is not going under the throttle body.

 

Which FPR would you recommend for a 2k Max? I'm putting in a Walbro 255 FP and I'm looking to get an FPR.
So according to what I read the Nismo one won't fit, correct?
What other ones would be good? What would I need to get it to fit?
Thanks.

 

That has gotta be hard as hell to adjust Brad.

Anybody got a spare rear rail? It looks like over the course of the winter working mine managed to get bent.

 

so that nismo fpr is what brings down the fuel pressure back to stock ??

 

Not to ***** up the thread but, is there really any benefit to having an adjustable FPR when you are using a 300 MAF and 370's?

I know the setup with stock FPR and 300zx MAF and 370's work just fine but would there be any benefit to swaping in another FPR?


Thanks,
JP

 

there is a benefit if you are running the walbro or just the 370's

it gives you the option of adjusting the base fp.

 

What would lowering the base FP do though?

My Setup: 300zx MAF, 370's, and Walbro.

JP

 

You're running rich with that setup. The Walbro ups the base FP. This makes it rich throughout.

 

Actually, with out having your ECU reprogramed for the Z32 MAF or a piggyback like e-mange to compensate for it you will run very lean after 4K rpm's or so. You might be able to get away with a Z32 MAF and 500cc or 550cc and no rom tune or e-manage.

You can't just pop in 370's or 550's by themselves, the car will dump too much fuel at idle and won't start. You would have to turn base fuel pressure way down for it to work.

 

so if i install my z32 maf and 555 injectors and jwt ecu without installin a fpr regulator to lower the fuel pressure down the car will not start?

 

is the ecu programmed for the 550's?

 

yes the ecu is programmed for the 555 z32maf 7200 rev

 

No, that was in referance to those running larger injectors with out a ECU tune or piggy back. If you have your ECU tuned for the 550's and z32 MAF then everything is fine. The fuel pressure does not have to be turned down. I am assuming your running a walbro with all this so your fuel pressure will be a tad higher but nothing that is going to cause problems. In the future you can get a AFPR and return the fuel pressure to the stock specs but it won't cause problems if you don't.

 

thats what i wanted to know thanks
yes i am runing a walbro also
i was worried after i installed the 555s z32 maf n jwt ecu that the car wouldnt start because i didnt have a fpr regulator to turn down the fuel pressure