Omega Owners Forum

Chat Area => General Car Chat => Topic started by: CG2 on 26 May 2013, 23:43:02

Title: Fuel rail pressure.
Post by: CG2 on 26 May 2013, 23:43:02
Anyone now the stock fuel rail pressure on omega?

3.2 lump.  :)
Title: Re: Fuel rail pressure.
Post by: Jimbob on 26 May 2013, 23:46:32
3.8 bar from memory :y
Title: Re: Fuel rail pressure.
Post by: CG2 on 26 May 2013, 23:50:01
Oooooh, just shy. Need 60 psi.  :-\
Title: Re: Fuel rail pressure.
Post by: tunnie on 26 May 2013, 23:57:52
Oooooh, just shy. Need 60 psi.  :-\

Out of interest, why?
Title: Re: Fuel rail pressure.
Post by: CG2 on 26 May 2013, 23:58:59
Oooooh, just shy. Need 60 psi.  :-\

Out of interest, why?

Because 55psi is too low. :)
Title: Re: Fuel rail pressure.
Post by: Andy B on 27 May 2013, 10:00:15
Oooooh, just shy. Need 60 psi.  :-\

Out of interest, why?

Because 55psi is too low. :)

Too low for what?  ???
Title: Re: Fuel rail pressure.
Post by: Kevin Wood on 27 May 2013, 11:03:24
If the pump is designed to deliver 55 PSI I'd say it'd stretch to 60 with a different FPR... and a different engine, of course, because increasing the fuel pressure on a standard V6 is a hiding to nothing. ;)
Title: Re: Fuel rail pressure.
Post by: Johnny English on 27 May 2013, 11:16:37
Retrofitted an AutoGauge fuel press gauge, which indicates 3,0 bar when starting and 2,2 - 2,3 bar on normal run.
Title: Re: Fuel rail pressure.
Post by: TheBoy on 27 May 2013, 12:13:27
Doesn't the replacement engine come with the correct FPR that it needs, or is this being done piecemeal?

Kevin Wood does present a valid point - is the in-tank pump man enough, or would you be pushing that a bit hard. Certainly wouldn't want it going lean at WOT.

Does the pipework and filter allow enough flow? Looks to be a few gotchas that are out there that could trip you up.
Title: Re: Fuel rail pressure.
Post by: CG2 on 27 May 2013, 16:30:27
Oooooh, just shy. Need 60 psi.  :-\

Out of interest, why?

Because 55psi is too low. :)

Too low for what?  ???

Too low for 60psi! Silly! ;D

That's a difference of 5psi. Nosey Parker! ;)
Title: Re: Fuel rail pressure.
Post by: CG2 on 27 May 2013, 16:33:57
Had a 3.2 inlet manifold in my hand today, had 3.8 bar printed on it.  :y



Title: Re: Fuel rail pressure.
Post by: albitz on 27 May 2013, 16:44:18
Got a 3.2 injector rail sat on my bench and it is also 3.8 bar. I guess that's decided then. :y
Title: Re: Fuel rail pressure.
Post by: CG2 on 27 May 2013, 17:43:32
Need 4.15 bar from the same system.

Possible?  :)
Title: Re: Fuel rail pressure.
Post by: RobG on 27 May 2013, 17:46:31
If most of your replies are cryptic how do you expect answers ???
Title: Re: Fuel rail pressure.
Post by: martin42 on 27 May 2013, 17:51:04
more info would be use full,its like saying what heating pump will suit my heating system with out know how many rads,how many floors etc,please be helpful,we cant give advise if you dont tell us!!!!!!!!!!
and it also wastes members time and also the WRONG advise can also be given!!!!
Title: Re: Fuel rail pressure.
Post by: Andy B on 27 May 2013, 18:10:51
Oooooh, just shy. Need 60 psi.  :-\

Out of interest, why?

Because 55psi is too low. :)

Too low for what?  ???

Too low for 60psi! Silly! ;D

That's a difference of 5psi. Nosey Parker! ;)

 :P :P :P :P :P
Title: Re: Fuel rail pressure.
Post by: Andy H on 27 May 2013, 19:02:24
Oooooh, just shy. Need 60 psi.  :-\

Out of interest, why?

Because 55psi is too low. :)

Too low for what?  ???
LS1 or similar (I presume)

http://www.omegaowners.com/forum/index.php?topic=113793.0;#33 (http://www.omegaowners.com/forum/index.php?topic=113793.33)
Title: Re: Fuel rail pressure.
Post by: TheBoy on 27 May 2013, 19:12:34
Need 4.15 bar from the same system.

Possible?  :)
Worth a call to those useless chavs at Courtney. They sell higher rated fprs, without understanding why it will do 3 parts of shag all in the application they sell it for. Might suit your requirements though  :-\
Title: Re: Fuel rail pressure.
Post by: dbug on 28 May 2013, 00:42:19
Oooooh, just shy. Need 60 psi.  :-\

Out of interest, why?

Because 55psi is too low. :)

Too low for what?  ???
LS1 or similar (I presume)

http://www.omegaowners.com/forum/index.php?topic=113793.0;#33 (http://www.omegaowners.com/forum/index.php?topic=113793.33)

Think you presume right mate ;)  We're back to the cryptic posts ???
Title: Re: Fuel rail pressure.
Post by: Kevin Wood on 28 May 2013, 10:18:48
.. as to whether the pump is man enough, what you need to do is get a FPR set to your desired fuel pressure, connect it to the system and then measure the flow rate out of the return line. Time how long it takes to fill a 5L petrol can, for example.

There are various ways to work out the required flow rate for your engine based on expected power output. Just make sure you've got a sensible margin of flow above that (say 50% or so).
Title: Re: Fuel rail pressure.
Post by: 05omegav6 on 28 May 2013, 12:52:33
Fuel pipe diameter will have a bearing on flow rate vs pressure :-\

Would the fuel pipes/filter/pump from an early 2004 Monaro do the trick :-\
Title: Re: Fuel rail pressure.
Post by: biggriffin on 28 May 2013, 13:10:11
Very criptic,but me think as a few others Ls 1.
Yes would fit with some minor mods,and be easier to transplant it still on front subframe,to gauge what mod needed,to transmission tunnel.
 
Title: Re: Fuel rail pressure.
Post by: 05omegav6 on 28 May 2013, 13:27:35
Fuel pipe diameter will have a bearing on flow rate vs pressure :-\

Would the fuel pipes/filter/pump from an early 2004 Monaro do the trick :-\

Am I correct in thinking that the pressure marked on the regulator is the pressure of fuel required to open the valve within the regulator?

If so, pop a 5 bar regulator into an Omega fuel rail and see if the fuel pump can deal with it :y

If it can't, then you need a more potent fuel pump :y
Title: Re: Fuel rail pressure.
Post by: biggriffin on 28 May 2013, 14:36:17
Oh to add an omega with an Ls1 fitted,was called a clubsport available.downunder. :y
Title: Re: Fuel rail pressure.
Post by: 05omegav6 on 28 May 2013, 14:45:12
Oh to add an omega with an Ls1 fitted,was called a clubsport available.downunder. :y

Sorry to dissappoint you, but the Commodore is only vaguely related to the Omega. The only parts that I know of which are fitted to both cars are the rear wheel bearings. They are the same on both the Commodore and the Omega B estate :y
Title: Re: Fuel rail pressure.
Post by: biggriffin on 28 May 2013, 14:52:01
It bears a simalar resemblance. Part of the floorpan and rear doors,and some other interior trim. Not worth spliting hairs, built by gm tho.
Title: Re: Fuel rail pressure.
Post by: symes on 28 May 2013, 15:04:00
reckon you need Moroso pump and regulator- I got little one on rover 70gal per hour iirc
Title: Re: Fuel rail pressure.
Post by: Doctor Gollum on 28 May 2013, 23:39:32
If it is available, take the FPR off the new engine and fit it to a V6 Omega. Then if it starts take it for a drive and see if the Omega fuel pump can keep up :-\

Either way your question will be answered :y
Title: Re: Fuel rail pressure.
Post by: biggriffin on 29 May 2013, 12:00:09
If it is available, take the FPR off the new engine and fit it to a V6 Omega. Then if it starts take it for a drive and see if the Omega fuel pump can keep up :-\

Either way your question will be answered :y

Urm 1st mr cixer is jo bloogs then he becomes cixer again,now he answering his own post.help the llunitics are running the asylum. ;D :D
Title: Re: Fuel rail pressure.
Post by: 05omegav6 on 29 May 2013, 13:00:54
I think you've confused yourself ;D
Title: Re: Fuel rail pressure.
Post by: CG2 on 29 May 2013, 18:38:08
I think you've confused yourself ;D
If I wasn't confused before, I am now...

...who am I again?  ;D