Installing Walbro 255L fuel pump into stock application

[Punknoodle]

Hello,

Just a quick question really, hoping for a nice simple answer

I have a slightly modified ST185 Celica, shortly it will be getting a Link G4 Xtreme ECU. I have been getting all of the prep work done like getting a new MAP sensor, making an adapter for the manifold air temp sensor, moving the battery to make a new intake pipe (AFM-less) etc.

While moving the battery, I dropped the fuel tank so I could drill through the floor to mount my bracket. While the tank is out, I thought I might was well install a better fuel pump in there as I intend on running bigger injectors down the track. I have bought a Walbro 255L in tank unit.

I have also read these pumps do not like running in low power mode, so I was going to adapt the wiring at the Fuel Pump Relay so that the pump is never run through the resistors, and always receives full power.

My question, is will I need to run an aftermarket Fuel Pressure Regulator with this pump using the factory injectors and ECU in the mean time? The only reason I want to install it now and not when I do the computer / injectors is because the tank was a bit of a pain to remove and I don't like doing awkward things twice if I can avoid it!

Thanks for any advice you can give me!

Nick

EDIT: Nevermind, I just went and bought a Turbosmart FPR800. Do it once, do it right and all that!

[RT40Corona4AGTE]

in response to your question, no you dont have to use an adjustable reg with factory injectors and ecu. But the FPR800's are good units too, very reliable and consistant.

[banana_socks]

When I was doing some research into fuel pumps for my 3S, came across the following article:
http://wolfkatz.com/Articles/WolfKat...l%20Report.pdf
In summary, they strongly suggest not to run the stock (unmodified) fuel rail with a high flow pump as it can restrict flow considerably and cause a large pressure difference between injectors. Some people said they had run like this for considerable time without problems, but I think its good to at least consider.

[Punknoodle]

Fantastic read, thank you! That makes me change my mind a little that does...

EDIT: So I'm going to be sending my fuel rail in to get rebored by KO Racing. Problem solved hopefully. Thanks for the heads up!