Walbro 255

[U8dust]

I was just wondering if my car is ready for a fuel pump, and also do I need to put in anyother modifications when I put the pump in?

Mods:
K&N Filter, Hacked Air Can, 2.5 Exhaust, Boost Controller, Greddy BOV, Boost Gauge, Aftermarket Clutch, Re-Built Head, New (Stock) Turbo, Blitz Turbo Timer, Gutted Cat, and Free Mods.

Tuesday Im getting the Walbro 255lph put in and getting it datalogged. What will I safely be albe to boost to with my current set up? Thanks.

 

[Antilles]

yes its ready, no you dont need other mods unless its a high pressure pump, and i wouldnt boost over 16psi just to be safe.

 

[U8dust]

K, it IS the High Preassure...does that make a diffrence?

 

[Antilles]

yeah. you should get a adjustable fuel pressure regulator. without one you will run very rich.

 

[Terror_Eclipse]

he wont need a FPR he will run 3 bars rich with this fuel pump, my friend has the excat same one and his is 3 bars rich, until he turns the boost up then it will go down...

he wont b hella rich, but none the less he will be but not enough to make anythign go wrong, this setup is good for future upgrades

 

[nine5raptor]

and how will turning up the boost take care of all of the idle and part throttle fpr overrun issues? the proper way is to get an afpr. too much fuel can be just as much of an issue as too little.

 

[Taboo]

Since the O2 sensor has the last word at part-open throttle, the ECU runs the injectors at lower IPWs to maintain the correct A/F ratio if higher than stock fuel pressure inside the rail is realized. If the ECU is not able to shorten the IPWs at idle any more - and the engine consequently runs too rich, hacking the MAS and introducing more unmetered air into the engine as means of tuning the A/F ratio is an easy solution. In any case, AFPR still remains the best option.

 

[nine5raptor]

How far can the ecu adjust? I have had mine running at 17% stft and ltft with a hacked mas and some ghetto mods