return fuel system with surge tank - MY350Z.COM Forums



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Old 06-10-2012, 12:36 PM   #1
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Default return fuel system with surge tank

I'm about to set up a swirl tank on my car and the simple thing would be for me to run a 255 to feed the tank, and an external 255 from the tank to my motor. Will the OEM pressure regulator flip out from the added pressure or will it do it's job just fine? Has anyone run one in a basic NA config without extra needed parts or extra tuning.


I'm tired of fuel starve under 1/2 tank , not to mention my car will be a lot lighter if I don't have to go out on track with close to a full load. The pot will sit under the factory enclosure, the glove box hole and sub hole are getting covered in sheet metal to seperate them from the interiour .
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Old 06-11-2012, 09:06 AM   #2
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So basically, can I run a 255 fuel pump on an NA setup without additional problems or tuning?

Once I get the swirl tank setup , I will post a full how too. Can't wait for fuel starve to be gone.
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Old 06-11-2012, 09:27 AM   #3
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you have a return fuel system right?

you will need to have at a minimum a return overflow from the surge tank back to the stock tank (which necessitates a return fuel system).

To run a surge tank properly, you need a return fuel system and an external FPR. The return fuel dumps back into the surge tank. and the overflow back to the stock gas tank.

Last edited by str8dum1; 06-11-2012 at 09:34 AM.
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Old 06-11-2012, 09:30 AM   #4
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Quote:
Originally Posted by str8dum1 View Post
it wont see extra fuel pressure... nothing will change.
This.

You're starving at less than 1/2 tank regularly or intermittently?
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Old 06-11-2012, 09:35 AM   #5
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ninja edit-- above. he needs to have an overflow back to the stock tank.... the 1st pump runs at basically 0psi and will pressurize the surge tank in no time without a return overflow.
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Old 06-11-2012, 09:39 AM   #6
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Quote:
Originally Posted by str8dum1 View Post
you have a return fuel system right?

you will need to have at a minimum a return overflow from the surge tank back to the stock tank (which necessitates a return fuel system).

To run a surge tank properly, you need a return fuel system and an external FPR. The return fuel dumps back into the surge tank. and the overflow back to the stock gas tank.
No need for a return system

In tank pump to surge tank
Surge tank to external pump, plumbed back to the OEM fuel line going to engine
Return/dump off top of surge tank run back into the OEM fuel tank, most likely above the pickup like you would on a return fuel system loop from the engine.


I starve on longer right handers below 1/2 tank, and it has gotten worse with the latest aero.
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Old 06-11-2012, 10:30 AM   #7
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In for updates
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Old 06-11-2012, 02:06 PM   #8
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http://shop.cj-motorsports.com/CJM-F...fpofitting.htm is what I'm grabbing to hook up the OEM fuel line to the surge tank, the 255 internal and external pumps are easy to find , surge tank I just need to measure and get one that fits , only thing in the air is a fitting to hook -6 line back into the OEM fuel system.
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Old 06-11-2012, 02:11 PM   #9
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a overflow back to the stock tank needs the return parts in the stock basket.

You basically just repeated what I told you.

Quote:
Originally Posted by terrasmak View Post
No need for a return system

In tank pump to surge tank
Surge tank to external pump, plumbed back to the OEM fuel line going to engine
Return/dump off top of surge tank run back into the OEM fuel tank, most likely above the pickup like you would on a return fuel system loop from the engine.


I starve on longer right handers below 1/2 tank, and it has gotten worse with the latest aero.
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Old 06-11-2012, 04:13 PM   #10
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Quote:
Originally Posted by str8dum1 View Post
a overflow back to the stock tank needs the return parts in the stock basket.

You basically just repeated what I told you.
Edits and stuff, I probably already clicked reply . No big deal, but the part where I said no return sytem is needed, I mean the main fuel system to the engine and changing the regulator. Since I'm keeping the OEM non return system it will take a lot longer for the surge tank to empty and starve when the in tank pump starves.

Being NA I get around 8 mpg on the track, if could pull enough G's to make the surge tank starve at half full (it won't be as easy as the OEM fuel tank because it's not a saddle setup) I would have to keep a constant rt hand loading for 2 miles, thus keeping the in tank pump from feeding the surge extra gas.

I think this will work for any track junky That is not running a return system, probably easily modded to a return FI style system too.

Full interiour cars will need to relocate to sub and glove box, sub to the pass side, glove box to drivers side. Very simple and easy to do.
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Old 06-12-2012, 01:55 AM   #11
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Quote:
Originally Posted by terrasmak View Post
Edits and stuff, I probably already clicked reply . No big deal, but the part where I said no return sytem is needed, I mean the main fuel system to the engine and changing the regulator. Since I'm keeping the OEM non return system it will take a lot longer for the surge tank to empty and starve when the in tank pump starves.

Being NA I get around 8 mpg on the track, if could pull enough G's to make the surge tank starve at half full (it won't be as easy as the OEM fuel tank because it's not a saddle setup) I would have to keep a constant rt hand loading for 2 miles, thus keeping the in tank pump from feeding the surge extra gas.

I think this will work for any track junky That is not running a return system, probably easily modded to a return FI style system too.

Full interiour cars will need to relocate to sub and glove box, sub to the pass side, glove box to drivers side. Very simple and easy to do.

Just let us know what you find out, new to this fuel starvation problem, but rather be safe than sorry. Have to do some more reading on the subject
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Old 07-28-2012, 06:21 PM   #12
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So, did you end up getting a swirl tank and pumps?
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Old 07-28-2012, 06:27 PM   #13
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Old 07-28-2012, 11:48 PM   #14
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Quote:
Originally Posted by 3hree5ive0ero View Post
So, did you end up getting a swirl tank and pumps?
Getting the parts together right now, going to be on hold for a few. Wiped out the front end , had a nasty off at the track today.
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Old 07-29-2012, 12:00 AM   #15
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how crap how have i missed this one?

my setup, obviously NA dosnt need dual 044's for external pumps though.

only difference is the pumps are flipped around now to accommodate the lines in the car. running a setup like this no issues even with a return setup since the fuel swirl pot has to be completely full to push fluid out the top back into the tank(the tiny -4 an), the -6an is the return from the fpr, the -8an on top is the feed and then dual -8an to the pumps but again not needed for NA one is enough.

not sure on the baffling inside would have to ask sasha on the details for that.

a note though the stock pump in tank should be more then enough with a 255 feeding up front. you will get slightly more flow then the 255 can provide on its own.

Last edited by jerryd87; 07-29-2012 at 12:02 AM.
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Old 07-29-2012, 05:51 PM   #16
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So Jerry , your saying to just leave the OEM pump in place and run a 255 from the swirl tank to the motor?
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Old 07-29-2012, 08:59 PM   #17
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for NA? i would no need for something more, since the intank isnt providing any pressure its quite possible it will produce more volume then your 255 external. now if you have a 255 intank already then go for it just w/e is cheaper either one will work. the 255 should be able to get just a little bit extra fuel since they dont have to "suck up" fuel so they can provide a little extra flow at the same pressure compared to normal.
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Old 12-10-2012, 10:17 AM   #18
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The 255 external is ordered from www.nissanraceshop.com , the adapter from the OEM fuel pump to -6 fittings will be ordered from CJM tonight, finally starting to get this project going.
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Old 12-10-2012, 10:34 AM   #19
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Nice. Post pics if you can.
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Old 03-17-2013, 08:30 PM   #20
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Still in work, got the fittings together now, pump, tank , now I just need an external fuel pressure regulator.
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