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        General >> Problems >> Get clear with fuel pressure regulator 24v
        
(Message started by: Martinss on Oct 14^th, 2013, 7:17am)

Title: Get clear with fuel pressure regulator 24v
Post by Martinss on Oct 14^th, 2013, 7:17am

Hello!

HERE (http://www.fordscorpio.co.uk/obd2scan6.htm) it says, that fuel pressure on 24v BOB should be constant 3bar. How could it be constant if regulator has vacuum inlet? I have read in various forums, that it rises and drops approximately 0.5 bar.
How much bar there should be on idle and how much bar there should be when accelerator pedal is floored for example? Has anybody fitted adjustable fuel pressure regulator to BOB?

Title: Re: Get clear with fuel pressure regulator 24v
Post by Tompion on Oct 14^th, 2013, 9:43am

Hi

Have a look HERE (http://www.fordscorpio.co.uk/cgi-bin/yabb/YaBB.pl?board=Advice;action=display;num=1353955794)

Title: Re: Get clear with fuel pressure regulator 24v
Post by Martinss on Oct 14^th, 2013, 10:35am

Ok, thanks Tompion, one more question. Dave says it should be 2.2 - 2.5 bar with vac and 3.0 - 3.2 bar without vac. In idle it is with vac and when rpm rises vac disappears?

Title: Re: Get clear with fuel pressure regulator 24v
Post by Tompion on Oct 14^th, 2013, 12:22pm

In effect that’s true but it’s to do with opening the throttle rather than revs. When the throttle is closed there’s maximum vacuum on the engine side of the butterfly (the FPR vac pipe is connected that side), as you open the throttle the pressure on the engine side becomes closer to that of the atmospheric pressure thus the vac to the FPR drops.

Title: Re: Get clear with fuel pressure regulator 24v
Post by Martinss on Oct 14^th, 2013, 1:45pm

Ok, thanks for information. :)

Title: Re: Get clear with fuel pressure regulator 24v
Post by Dave2302 on Oct 15^th, 2013, 10:35am

Yeah, but to check it with no vac we pull the vac pipe while they are idling, to see if it rises.

I have fitted an adjustable reg to my BOB engined Puma, but it requires a bit of skilled modding to the fuel rail ;)

You have to remove the inlets and fuel rail first.
Then remove stock reg, drill a return passage right through, then turn up an aluminium bung and ally weld it in where the stock reg came out.............

Then you fit the adjustable reg somewhere sensible where you can get at it, and plumb it so it is regulating the return fuel ;)

TBH you don't need to do this to a stock engine, mine is a well modified 7200rpm howler in a Stage Rally Car ;D

Cheers Dave

Title: Re: Get clear with fuel pressure regulator 24v
Post by a900one on Oct 15^th, 2013, 5:05pm

Dave have you done anything to the ecu to up the power, can it be done.

Title: Re: Get clear with fuel pressure regulator 24v
Post by Scorpio on Oct 15^th, 2013, 7:59pm

A900e see here http://www.fordscorpio.co.uk/cgi-bin/yabb/YaBB.pl?board=Advice;action=display;num=1375651906;start=11#11

Also, http://www.fordpower.org.uk/forum2/index.php/topic,10121.0.html

Title: Re: Get clear with fuel pressure regulator 24v
Post by Dave2302 on Oct 22^nd, 2013, 9:50am

on 10/15/13 at 17:05:01, a900one wrote:

Dave have you done anything to the ecu to up the power, can it be done.

Hi,

Yes it can now be done !!

See Adams links above.

Untold hours and hours of hacking work de coding the binaries to produce a working definition file ;)

Cheers Dave