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Topic: Get clear with fuel pressure regulator 24v (Read 2921 times) |
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Martinss
Newbie
Ford Sierra 2.9i BOB
Posts: 27
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Get clear with fuel pressure regulator 24v
« on: Oct 14th, 2013, 7:17am » |
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Hello!
HERE 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?
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Tompion
Administrator
1997 2.3 Ultima estate.
Posts: 2918
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Re: Get clear with fuel pressure regulator 24v
« Reply #1 on: Oct 14th, 2013, 9:43am » |
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Hi
Have a look HERE
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ABS multiplug wheel sensor pins MK IV or MK 20
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Martinss
Newbie
Ford Sierra 2.9i BOB
Posts: 27
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Re: Get clear with fuel pressure regulator 24v
« Reply #2 on: Oct 14th, 2013, 10:35am » |
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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?
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Tompion
Administrator
1997 2.3 Ultima estate.
Posts: 2918
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Re: Get clear with fuel pressure regulator 24v
« Reply #3 on: Oct 14th, 2013, 12:22pm » |
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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.
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ABS multiplug wheel sensor pins MK IV or MK 20
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Martinss
Newbie
Ford Sierra 2.9i BOB
Posts: 27
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Re: Get clear with fuel pressure regulator 24v
« Reply #4 on: Oct 14th, 2013, 1:45pm » |
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Ok, thanks for information. 
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Dave2302
Senior Member
2006 Mercedes S55 AMG, Retired Barefoot Waterskier
Posts: 1119
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Re: Get clear with fuel pressure regulator 24v
« Reply #5 on: Oct 15th, 2013, 10:35am » |
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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 
Cheers Dave
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Dave "The 'ol Bear" ex Footer !
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a900one
Full Member
A scorpio is for life not just for christmas
Posts: 980
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Re: Get clear with fuel pressure regulator 24v
« Reply #6 on: Oct 15th, 2013, 5:05pm » |
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Dave have you done anything to the ecu to up the power, can it be done.
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Dave2302
Senior Member
2006 Mercedes S55 AMG, Retired Barefoot Waterskier
Posts: 1119
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Re: Get clear with fuel pressure regulator 24v
« Reply #8 on: Oct 22nd, 2013, 9:50am » |
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on Oct 15th, 2013, 5:05pm, a900one wrote:| Dave have you done anything to the ecu to up the power, can it be done. |
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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
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Dave "The 'ol Bear" ex Footer !
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