look im gonna have to burst the bubble here on the whole "big increase in power" via the fuel pump thing, unless you have put BIGGER fuel injectors in aswell.......you WILL NOT get a "big increase in power" because its the injectors that regulate the fuel going in not the pump!!!!!!!!!!!!!!!!
so whoever told you that you would get a big increase in power by just doing the fuel pump is full of shite.
my 2 cents. its been bugging me.
i have done the injestors in my car and i will be getting a Walbro fuel pump soon to put in the car. will post results up when i have done it all.