BenB
|
| posted on 4/4/07 at 04:55 PM |
|
|
Fuel pressure regulators
Is there such a thing as an injection fuel pressure regulator? I'm looking for a regulator for when I go EFi- will any old thing do (like a
FilterKing) or do I need to check what PSI it can handle- I seem to recall the pressure/flow requirements of carbed vs injection pumps differs.....
|
|
|
|
|
theconrodkid
|
| posted on 4/4/07 at 05:05 PM |
|
|
http://cgi.ebay.co.uk/Premium-Adjustable-fuel-pressure-regulator-with-gauge_W0QQitemZ170098300422QQcategoryZ72205QQrdZ1QQcmdZViewItem
fleabay for mine
who cares who wins
pass the pork pies
|
|
|
BenB
|
| posted on 4/4/07 at 05:18 PM |
|
|
Cheers!!! I'll go shopping on Ebay then....
I found some which go up to 10 Bar- would have thought by then (3* nominal pressure) the injectors would be either blowing off the fuel rail or the
injectors would be cream crackered...... Just wanted to check there aren't any other limiting factors!!!
Thanks again...
|
|
|
RazMan
|
| posted on 4/4/07 at 09:38 PM |
|
|
My FSE fuel regulator came with an oil filled gauge. I've set mine at 1 bar which is fine for my setup - it goes to 5 bar if needed.
There's no real need to install one unless you have got a non standard setup - i.e. mine has a different inlet plenum & larger injectors.
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
|
|
|
martyn_16v
|
| posted on 5/4/07 at 04:00 PM |
|
|
Go scrappy hunting, pretty much every petrol car built in the last 15 years has one of some sort, it won't be difficult to find one you can use.
They're small things, amazing how often they can accidentally fall into a toolbox without you realising 
|
|
|
martyn_16v
|
| posted on 5/4/07 at 04:04 PM |
|
|
quote:
Originally posted by RazMan
There's no real need to install one unless you have got a non standard setup
Every efi system will need some form of fuel pressure regulation, the pump alone can't maintain a consistent enough pressure across the range of
operating conditions. The debate around fuel pressure regulators generally concerns whether you need to use the manifold vacuum reference it can
provide, but either way it still definitely needs to be present.
|
|
|
MikeRJ
|
| posted on 5/4/07 at 04:05 PM |
|
|
quote:
Originally posted by CaLviNx
Cue "MikeRJ" spouting something else though
Yawn.
|
|
|
RazMan
|
| posted on 5/4/07 at 05:01 PM |
|
|
quote:
Originally posted by martyn_16v
Every efi system will need some form of fuel pressure regulation, the pump alone can't maintain a consistent enough pressure across the range of
operating conditions.
Of course you are quite right, but I was referring to the adjustable variety. These are a bit ott unless you have special requirements - pushing
injectors a little more for example.
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
|
|
|
NS Dev
|
| posted on 5/4/07 at 05:08 PM |
|
|
quote:
Originally posted by RazMan
My FSE fuel regulator came with an oil filled gauge. I've set mine at 1 bar which is fine for my setup - it goes to 5 bar if needed.
There's no real need to install one unless you have got a non standard setup - i.e. mine has a different inlet plenum & larger injectors.
ehhhh?
Mistype presumably? You're on injection surely Razman! 1 bar is 15 psi! That's a bit short of a picnic!!!
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
|
|
|
RazMan
|
| posted on 5/4/07 at 05:15 PM |
|
|
Err no, thats what the mapping guy set it to. It rises to 2 bar without vacuum. I think that is the pressure that Ford efi systems are set as
standard.
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
|
|
|
martyn_16v
|
| posted on 5/4/07 at 07:20 PM |
|
|
the last fpr I robbed off a mondeo zetec was 2.7 bar, about 3 is the norm AFAIK. Too low a pressure and the injectors won't spray properly so
yours can't be too far wrong if it goes alright.
|
|
|
TangoMan
|
| posted on 5/4/07 at 09:06 PM |
|
|
quote:
Originally posted by RazMan
Err no, thats what the mapping guy set it to. It rises to 2 bar without vacuum. I think that is the pressure that Ford efi systems are set as
standard.
Raz, You should confirm that he was correct because it sounds unlikely that the manifold vacuum at idle will adjust the presure by 15psi. mine alters
by around 3psi. I thought Fords ran around 2.3 -2.5 bar as standard.
He may well be correct but it wouldn,t hurt to be sure!!
Summer's here!!!!
|
|
|
paulf
|
| posted on 5/4/07 at 09:12 PM |
|
|
I used one from an astra, its a bosch unit that has 3 connections, fuel in, fuel out and vacuum.It may be usefull to be able to adjust it but it is
another variable when mapping, if adjusted after the engine is set up the fueling would be incorrect and require remapping.
Im looking for one for my new setup using gsxr throttle bodys and plan on visiting the scrapyard for one next week,
Paul
|
|
|
RazMan
|
| posted on 5/4/07 at 10:01 PM |
|
|
quote:
Originally posted by TangoMan
Raz, You should confirm that he was correct because it sounds unlikely that the manifold vacuum at idle will adjust the presure by 15psi. mine alters
by around 3psi. I thought Fords ran around 2.3 -2.5 bar as standard.
He may well be correct but it wouldn,t hurt to be sure!!
Sound advice - I will give him a ring next week. 
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
|
|
|
RazMan
|
| posted on 5/4/07 at 10:16 PM |
|
|
Just did a bit of digging on the FSE site....
"Firstly, this valve has an adjustable fuel pressure, effected by the movement of an adjustment screw on the crown of the unit.
New Power Boost Valves are pre-set with a maximum fuel pressure of 2.5, 3.0 or 3.5 bar, depending on the vehicle in question, and similarly (to the
original valve) the fuel pressure is reduced by 0.5 bar approximately at idle. There the similarities end.
On acceleration from standstill the Power Boost Valve fuel pressure will increase at 1.7 times the standard rate. This will produce a healthy, strong
fuel mixture strength which will instantly improve the drivability of your vehicle, providing:-
instant throttle response
removal of performance flat spots
faster acceleration
extra engine performance
The regulator enhances engine performance on acceleration by enriching the mixture strength. On constant throttle and cruise conditions the valve
returns to a normal regulator function."
Obviously they are blowing their own trumpet but I went and bought one as the oem Ford jobbie was actually more expensive. Hey ho ...
[Edited on 5-4-07 by RazMan]
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
|
|
|
NS Dev
|
| posted on 5/4/07 at 11:04 PM |
|
|
Hi Razman
nowt daft meant by my comment, just that it won't be set to 15psi (1 bar) that is daft, the injectors will barely spray at that pressure.
On a normally aspirated engine ignore the "pressure variation" of the valve, be it "rising rate" or any other ( I use these
fse ones as I have them laying about, but weber ones are much better and more reliable )
I take it you son't have a supercharger on it yet? On forced induction you will obviously see the fuel pressure rise by the same as your boost
pressure, but on a normally aspirated setup, its pretty standard to just vent the compensation port of the regulator straight to atmosphere
(that's how mine are and have been on the last 4 cars)
Pressure wise as other have said, std systems run at 2.5 or 3 bar normally, the off the shelf OEM bosch regulators are nearly all 2.5 or 3 bar.
|
|
|
RazMan
|
| posted on 6/4/07 at 09:39 AM |
|
|
No supercharger yet as that is going to have to wait a while (my bank manager is still recovering from the final push to SVA ) I've got the
larger injectors fitted and the fuel regulator so the scene is set - just the expensive bit to get now
You got me thinking and I double checked my fuel pressure. It is actually 1.5 bar at tickover and 3 bar with the vacuum pipe off but (tickover gets
very lumpy) so I assume the FSE regulator plays a role in improving tickover at higher fuel pressures, although I would imagine that mapping could
compensate for this too.
[Edited on 6-4-07 by RazMan]
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
|
|
|
.jpg)
