Originally Posted by
rsmark86
Good plan
I just need one lol, so does it fit a black top zetec rail?
Yes it does.
Originally Posted by
higgsy91
I'm after the 300 mark. I have the ref off a 1.8 at the minute.
I always thought you needed an RS one one because it worked differently to a naturally aspirated one.
I current have a walbro 255 pushing fuel to it too if that makes things any clearer.
FI regs are usually 1/1, so for every bar of boost it raises the fuel pressure a bar too, otherwise you end up with there being too much pressure acting against the injectors vs rail pressure supplying them.
For example if you had 3 bar fuel pressure and then ran 2 bar of boost you'd effectively only have 1 bar of fuel pressure without a 1/1 reg.