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R32 goes out in right curves

Stivo
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Stivo Rookie

Stivo

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Posted

Thank you.

The wiring is okay, i double checked it with a Multimeter. The Sky goes out only in right curves and only if the fuel tank isn't full (the issue starts at about a half-full tank)

In Germany more r32 have this issue. First i thought i need a tank-in-tank solution to counteract the G-Load.

Duncan Grand Master

Duncan

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Posted

I think that, as GTSBoy said, it will relate to how the oump is mounted in the  cradle. Less likely but also possible the cradle is not firmly secured to the mount in the bottom of the tank and has come loose.

Either way you need to open the tank back up to check.

The main thing to check is that the pump's sock/inlet filter is lying flat right at the bottom of the cradle. Also check the the filter is properly attached to the pump and can't leak, that the pump is secure in the cradle (as the diameter is much smaller than stock), and that the return line from the fuel rail is properly connected so that fuel returns into the cradle not the main tank.

I still have surge with low fuel (under 1/4 tank) in long high g corners on the track, even though I use an in tank lift pump + external surge tank. These days there are better designed aftermarket alternatives if you can't get the standard setup to work OK, like https://frenchysperformancegarage.com/collections/nissan-skyline-r32gt-r/products/fpg-new-nissan-skyline-r32-gt-r-bnr32-in-tank-surge-tank-kit-track-edition-te-fits-c34-stagea-v3-fpg-085

GTSBoy Grand Master

GTSBoy

Posted
Posted
10 hours ago, Stivo said:

The wiring is okay, i double checked it with a Multimeter.

I think you missed the point of what I said. You would need to be driving around a right-hand curve at the same time as measuring with the multimeter to prove this.

What I said was:

10 hours ago, GTSBoy said:

or you've fouled up the wiring so that it is shorting or going open circuit under that G load.

with emphasis added, for, you know, emphasis.

Murray_Calavera Mentor

Murray_Calavera

Posted
Posted

Yeah, I'm betting a combination of fuel pump is positioned higher then the factory pump and the filter/sock is shorter then the factory sock. 

Have a look at the frenchys performance garage hanger setup, they generally position the fuel pump nice and low so would be a good comparison for however you set your pump up.

  • 1 year later...
Stivo Rookie

Stivo

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  • Author
Posted (edited)

Hello again,

I just want to tell you that i found the reason why my bnr32 is going out in right corners.

I had my car tuned by a company and they fitted the Emu Classic and a new fuel pump in 2021.

I checked the loom, changed the walbro fuel pump with a Deatschwerks fuel pump. None of this helped.

Then I checked the fuel pressure and thought I was crazy. It was tuned with over 7 bar ( over 100psi) !!!

But why? So I checked the fuel return line and saw that it was closed.

That was probably also the reason why the tuner replaced the fuel pump, but he tuned the Emu with the 7 bar 🫣

The map in the emu has now been changed and evertyhing is fine.

IMG-20240924-WA0009.jpg

IMG-20240924-WA0006.jpg

Edited by Stivo
  • Like 5
  • 2 weeks later...
joshuaho96 Veteran

joshuaho96

Posted
Posted
On 10/26/2024 at 12:06 PM, Stivo said:

Hello again,

I just want to tell you that i found the reason why my bnr32 is going out in right corners.

I had my car tuned by a company and they fitted the Emu Classic and a new fuel pump in 2021.

I checked the loom, changed the walbro fuel pump with a Deatschwerks fuel pump. None of this helped.

Then I checked the fuel pressure and thought I was crazy. It was tuned with over 7 bar ( over 100psi) !!!

But why? So I checked the fuel return line and saw that it was closed.

That was probably also the reason why the tuner replaced the fuel pump, but he tuned the Emu with the 7 bar 🫣

The map in the emu has now been changed and evertyhing is fine.

IMG-20240924-WA0009.jpg

IMG-20240924-WA0006.jpg

It's my experience that when cars get old enough every failure starts to be unique and surprising like this. They must be reading Anna Karenina or something. 

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