Fuel returnline 2003 z4

[Z4supercharged]

Is anyone build returnline and delete oem fpr and modify m50b25nv intake/fuelrail with fpr?

I have some issues with my turbo setting with fuel pressure. Fuel pressure doesn't work with vacuum guided and i think problem is that fpr witcis in the tank.

 

[patriot66]

I fitted an Infinitas s/c early last year and the first part of the install is to replace the fuel filter/pressure regulator in the tank with a higher pressure one supplied in the kit. The standard one is 3.5bar, the higher pressure is 5bar if I remember correctly. I've never had an issue with it. Is this what you mean ?

 

[Z4supercharged]

Fuel pressure drop and engine run lean. I have walpro "hellcat" fuel pump. Where i can get that higher fpr?

 

[patriot66]

Infinitas Superchargers are in Gachenbach near Munich, Germany https://infinitas-automotive.com/en/supercharger/

 

[Z4supercharged]

I have to check that. I have 1.2-1.4bar boost in my setup.

 

[patriot66]

Turbo ?

 

[Z4supercharged]

Yes, engine rebuild with forcet piston, h-profil rods etc. But fuel problem, but i think that oem fpr cause the issue, need to plug or something. Build return line and change fuel rail m50 with m50 fpr vacuum/boost guided

 

[patriot66]