Does anyone know what vacuum tubes are supposed to be installed with the GBS plenum and ford fuel rail? I have modified the fuel rail to get it to fit by swapping the regulator to the opposite end and cutting down the pipe at the other end. However, I'm unsure what the stock vacuum tube coming out of the bottom of the regulator is supposed to be connected to. There is also a larger diameter outlet on the back of the plenum. Are these supposed to be connected together? Note: I don't plan on installing the IACV.
Usually the regulator small pipe goes to the Inlet manifold for vacuum feed, but most people just leave it disconnected. The larger pipe is probably
for a brake master cylinder, just cap this off. There should also be a threaded hole for the air team sender as well. Stating the obvious, make sure
you connect up the fuel rail the right way if you have swapped the regulator to the other end, sequence is tank, pump, rail, injectors, regulator then
back to tank.
Hope this helps.
Thanks for that. So I basically cap off the outlet on the back of the plenum and just remove the vacuum tube from the bottom of the regulator (without
capping off). I don't know why it needs that regulator when there is a stand alone regulator anyway.
Good point on the fuel rail. I wasn't sure if this was pre or post injectors so that's saved me another post!
If you are using the OEM ecu you may want to connect the regulator to the plenum as it may expect a change in the fuel pressure depending on the
vacuum. Do you have a separate regulator then as well as the one in the fuel rail ? If so get rid of one, you only need one and should be set to about
2.7bar iirc (one in the fuel rail is preset), and to confirm it goes after the injectors, basically the pump pushes fuel to the injectors at a higher
then required pressure then the regulator opens up to maintain a constant lower pressure irrespective of what the injectors are flowing. If you put it
before the injectors they will be at at,ospheric pressure as it will be connected directly to the tank.
I had similar plenum on my silvertop but that used the OEM injector rail tap hat sits in a sandwich plate, not sure if the silver and blacktops have
the same inlet ports and stub pattern but this may be an option. Just bolt the silvertop plate in between the head and the plenum.
Fiesta Escort Complete 1.6 Zetec Inlet Manifold
Some pictures of the two versions I tried here, pics not very good sorry.
http://fisherfury.weebly.com
[Edited on 19/2/17 by Ugg10]
[Edited on 19/2/17 by Ugg10]
I have connected the bottom of the regulator (on the outlet side of the fuel rail) to the tapping at the back of the plenum. Just get a threaded barb
connector and push the hose on to that.
I'm using the standard ECU and wiring plus the standard throttle body and MAF.
Details herehttp://www.martinsfurybuild.co.uk/fuel-system.html
[Edited on 20/2/17 by tims31]
quote:
Originally posted by Ugg10
If you are using the OEM ecu you may want to connect the regulator to the plenum as it may expect a change in the fuel pressure depending on the vacuum. Do you have a separate regulator then as well as the one in the fuel rail ? If so get rid of one, you only need one and should be set to about 2.7bar iirc (one in the fuel rail is preset), and to confirm it goes after the injectors, basically the pump pushes fuel to the injectors at a higher then required pressure then the regulator opens up to maintain a constant lower pressure irrespective of what the injectors are flowing. If you put it before the injectors they will be at at,ospheric pressure as it will be connected directly to the tank.
I had similar plenum on my silvertop but that used the OEM injector rail tap hat sits in a sandwich plate, not sure if the silver and blacktops have the same inlet ports and stub pattern but this may be an option. Just bolt the silvertop plate in between the head and the plenum.
Fiesta Escort Complete 1.6 Zetec Inlet Manifold
Some pictures of the two versions I tried here, pics not very good sorry.
http://fisherfury.weebly.com
[Edited on 19/2/17 by Ugg10]
[Edited on 19/2/17 by Ugg10]
Can you describe your system end to end, not sure why you are using two regulators should only need one? Are you using the OEM ecu and if so are the
injector rail with regulator, maf and ecu all from the same car?
[Edited on 23/2/17 by Ugg10]
quote:
Originally posted by Ugg10
Can you describe your system end to end, not sure why you are using two regulators should only need one? Are you using the OEM ecu and if so are the injector rail with regulator, maf and ecu all from the same car?
[Edited on 23/2/17 by Ugg10]
Ok, so do you have a swirl pot between the two pumps. If using two pumps then it should be -
Tank - filter - low pressure pump - swirl pot - (optional filter) - high pressure pump - injector rail - regulator (either separate or built into
rail) - swirl pot - tank.
If no swirl pot then
Tank - filter - high pressure pump (near tank) - injector rail - regulator (seoarate or built in) - tank
Note regulator should be around 3 bar for injection system (iirc the ford one is 2.7).
If you are running stick injectors/regulator and the plenum then there is no reason why this should not work (without the second regulator), the
emerald fuel map will be no where near maxed out and will probably be happier with a fixed fuel pressure rather than a vacuum dependent variable one.
[Edited on 23/2/17 by Ugg10]
OK, great. Thanks!
The car doesn't have a swirl pot, no (might therefore not have a low pressure fuel pump - I cant remember).
Ill remove the regulator as suggested but the only way I can think to fill the gap is the buy another fuel rail and take the other end off.
Unless anyone has a better idea?
i am just converting to the gbs plenum and fuel injection i am fitting an intank swirl pot and pump so keeping it simple just a straight flow and return to tank
quote:
Originally posted by Ron Lang
OK, great. Thanks!
The car doesn't have a swirl pot, no (might therefore not have a low pressure fuel pump - I cant remember).
Ill remove the regulator as suggested but the only way I can think to fill the gap is the buy another fuel rail and take the other end off.
Unless anyone has a better idea?
quote:
Originally posted by Ugg10
quote:
Originally posted by Ron Lang
OK, great. Thanks!
The car doesn't have a swirl pot, no (might therefore not have a low pressure fuel pump - I cant remember).
Ill remove the regulator as suggested but the only way I can think to fill the gap is the buy another fuel rail and take the other end off.
Unless anyone has a better idea?
So if you have no swirl,pot you don't need two pumps either. Keep it simple to start - tank - filter - high pressure pump - OEM fuelrail - OEM built in regulator - back to tank. Should be all you need to get you going.
No, I would leave it to atmosphere.
Great. I'll try it and let you know how I get on. Still battling with engine harness/ecu/fuse board wiring at the moment. I have had it going albeing very roughly! Now it's not again so something isn't right.
First check for me would be inlet leaks, I had to try three plenum of different makes before I got the plenum to seal yo the head, the injectors to
seal to the plenum and the throttle body to seal to the plenum. Copious amounts of sealing agent (hylomar or lock title gasket).
Also, new set of plugs does wonders. If still a bit rough measure the temperature of the exhaust headers, that will give you a clue as to which
cylinder is playing up, in general hotter than others means weak (leak), colder is either overfilling or no poor spark.
Hope this helps.