Got my hands on a malpassi FPR and a walbro 550hp fuel pump yesterday, goin to install them within the next few days,

question being wat pressure should i put the FPR at ?

Got my hands on a malpassi FPR and a walbro 550hp fuel pump yesterday, goin to install them within the next few days,

question being wat pressure should i put the FPR at ?

Are you really out of fuel?

As for pressure just get it all installed. Set to where it was stock then do a few runs with a Wideband O2 or Datalogger. Proceed to raise or lower the pressure until you have what you think is an optimum A/F ratio. It would be best to tune it on a dyno but you'll be able to tune just fine with a Wideband or a Logger. If you don't have either I suggest you leave your fuel system alone until you can properly monitor the engines Air/Fuel ratio or Timing, Knock and so on with a Data logger. Any kind of cheap air/fuel gauge that hooks to your stock narrowband is not good enough either. They are not accurate enough to depend on when tuning an engine.

nah im not out of fuel but i will be wen the supercharger is on

nah im not out of fuel but i will be wen the supercharger is on

Ahh I see. Well early planning is good. You'll probably need larger injectors and some type of engine management to fully take advantage of it also.

Ahh I see. Well early planning is good. You'll probably need larger injectors and some type of engine management to fully take advantage of it also.
Why? When Commodore owners run out of fuel, they fit Magna injectors.

We don't have them in the US but I am gonna guess they are V8's which probably come stock with smaller injectors.

6's and 8's but yeah, their injectors aren't too great.

From memory, Booya is running 6g74 stock injectors in his car :confused: