Lpfp setup for 800hp ?

[Silver]

Hi

I have a Z4 35i and that model is not easy to get to the fuel pump. Now the car is lifted up because I am doing some things this winter. And I have bought a BPM4 control module for the fuel pumps and a pression raceworks cover for the fuel tank with 6 bar regulator. Originally there is 5 bar. I have driven with a 525 pump in the tank but now that it is all separated I would like to prepare the Lpfp system to be able to handle about 800 hp. Right now I am driving with pure Di and a small 600 hp.

What fuel pumps do you others run for your 800 hp setup? I myself am thinking of continuing to drive with my 525 pump and also just adding a 535. Or is it enough to just add a 450? I have one like that lying around.

I'm thinking of all of you with very tuned 1 and 3 series Can help me

 

[SlowE93]

Hp or whp ?

 

[whyzee125]

a 525 and a 450 is plenty! If you do a 535, that needs to be your main pump and the 525 your secondary. Are you on full e85?

 

[Silver]

Hp or whp ?

Sorry, engine hp

 

[Silver]

a 525 and a 450 is plenty! If you do a 535, that needs to be your main pump and the 525 your secondary. Are you on full e85?

Okay. I just read that the 450 Max Can do 87 psi/6 bar so it will run on Max since my regulator is 6bar. No not E85 in now but can fill it in Sweden which is 1 hour drive from where I live in Denmark

 

[whyzee125]

Okay. I just read that the 450 Max Can do 87 psi/6 bar so it will run on Max since my regulator is 6bar. No not E85 in now but can fill it in Sweden which is 1 hour drive from where I live in Denmark

For a single 450 maybe, depending on your setup, but that would only be run on top of the 535 so those two together should push a good amount of fuel.

 

[Silver]

For info if others could use it I have chosen to go with a 535 and a full flow check valve on the feed hose. also my current 525 as a second. since I now go from 5 bar to 6 bar the flow rate will drop a lot from 101 gph to 89 gph for a 525 and a 535 can deliver 107 gph at 6 bar so even if I raise the fuel pressure I get a bit more flow with a 535. also I throw a 525 in the tank to future proof if I want to run E85 and mount a pi. throwing in some pictures when I have made my 2 pump setup since it is not just in a Z4

 

[Liquidsword32]

precision race works LPFP kits are the best!

 

[Silver]

Got my setup up and running today but apparently broke mine precision billet top hat as it screams loudly from the tank and the regulator does not regulate the pressure to 6 bar/87 psi but there is 120 Psi which is what the pumps Max is. so I have written to precision