Hi all im in the process of making a shopping list of goodies from rally design and im not sure whether i need to buy a fuel pressure reg or is this one on the end of the injector rail.Its from my new 2ltr zetec blacktop. I intend to use the existing standard ford injectors as the whole lot including the engine is new excluding the crappy plastic inlet manifold, i managed to get a set of gsxr throttle bodies last weekend for a fiver
Also i need to get a new fuel pump and was looking at the ones in rally design but im not sure which to get? cos i dont know what pressure it needs to deliver
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Yes

they're usually stuck on the end of the fuel rail. It's difficult to know without testing what pressure it'll be set at. Some are 2.5bar, some are 3bar.

Yes thats a fuel pressure reg.

Depends if you want an external pump or internal if you going external then use any one that fits the xr4x4 sierra will be plenty good enough btw its also the same pump as a xr3i and a few others

If your injection system is going to be a `bitsa` (bit's of this , bit's of that ) then you really do need an adjustable fuel pressure regulator - which need's to be set around 45 PSI .
Any fuel injection pump will do , they all run at considerably higher pressure than you need .

Ultimately fuel pumps are more chosen accourding to flow rate rather than pressure. the pressure will normally be 2.5-3 bar but the question is how much fuel are you going to be using (bearing in mind that unrequired fuel will just go back up the return pipe from the fuel reg to the swirl pot / tank.

So the fuel pump spec is concerned with max amount of fuel used. A 2L Zetec with TBs isn't going to chomp fuel so most pumps are going to be okay.

Bosch fuel pumps are popular because they're inline (and fitted to quite a few cars including some VWs and Vauxhalls). Equally there are quite a few vendors selling cheapo copies on Ebay.

If you wanted to get fancy you could work out your max fuel flow requirement based upon an estimated BHP but its more usual to buy something ballpark and keep an eye on the amount of fuel coming back out of the fuel reg as you rev the engine (if its trickles to a stop then don't rev the engine any harder until you've up-rated the pump). A different way of monitoring it would be by adding a T-piece into the fuel line and monitoring fuel pressure on a gauge. If you got even a hint of pressure loss as you go up the RPM then change to a higher rated pump (a full throttle lean moment could get expensive).

If your pump is over-spec'd you'll just be using electricity (which takes BHP via the alternator) to pump fuel around the car. Potentially that could lead to fuel temperatures increasing (especially if you've got a swirl pot return not a tank return).

So you don't want a ridiculously over spec'd pump (but it's better than an under spec'd pump and consequential lean run).

excellent, so i should be able to use it then and not have to buy one.
Anybody any sugestions on a pump? ive been loooking at the facet ones as they seem to be a popular choice, maybe the silver or red top ?
my appolergies if one of you has already responded by the time i post this but i cant type for sh1t!

Facet silver or red are for carbs not injection

what about the facet solid state? or if i go for a ford one are they available from any friendly motor factors and are they likely to be cheeper, i was thinking of a focus cos thats what engine is for so i suppose in theory that would be a good option

Solid state is still for carbs.

Focus pump will be the in tank type.
You want one like this;
http://cgi.ebay.co.uk/Fuel-Pump-Ford-Escort-XR3i-RS-Sierra-RS-Cosworth-XR_W0QQitemZ130244841265QQcmdZViewItem?hash=item130244841265&_trkparms=72%3 A1301%7C39%3A1%7C66%3A2%7C65%3A12%7C240%3A1318&_trksid=p3286.c0.m14

Not sure if Facet do an injection pump. The simplest option is a Bosch external injection pump (as opposed to the modern in-tank ones). They were used on lots of fuel injected cars in the early-mid 90's especialy GM.

e.g. like this

thanks fr your advice. At least i now know i can take it off the shopping list for rallyd next week as im way off that stage in the build yet but i thought if i do need one from there i may as well make it a bigger order and hopefully get some discount if i go down there in person and wave some pound notes in their face. With the credit crunch an all that i wouid av thought business would be slow for such companies.

something like this

is just the ticket.
If it can power a thirst V6 a frugal Zetec should be fine.

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Originally posted by BenB
It's difficult to know without testing what pressure it'll be set at.

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