Parallel Fuel Rail Mod
#1
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Parallel Fuel Rail Mod
This has prob been asked before but... Does anyone have any information on how to go about changing the fuel rails to a parallel setup? I have a FuelLab pressure regulator to fit once i have an idea of how to do it.
What fuel pressure should a 95 WRX have at idle and on boost? This could possibly change with the mods i've done...
K&N induction kit
H&S 3inch exhaust system from turbo back, standard headers and up-pipe.
Pro Alloy FMIC
Walbro 255lph fuel pump
Once the regulator is fitted i will go on to fit a set of 550cc injectors. Then hopefully a trip up to see Andy Forrest.
cheers
What fuel pressure should a 95 WRX have at idle and on boost? This could possibly change with the mods i've done...
K&N induction kit
H&S 3inch exhaust system from turbo back, standard headers and up-pipe.
Pro Alloy FMIC
Walbro 255lph fuel pump
Once the regulator is fitted i will go on to fit a set of 550cc injectors. Then hopefully a trip up to see Andy Forrest.
cheers
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No I haven't,sorry. I did think about taking photos when I was doing the conversion but I never got round to it !
I would try and explain how to do it on here but I wouldn't want to get the details wrong and mess your conversion up !
I did mine with the inlet manifold removed from the car,made it very easy.
I have a list of the parts required somewhere,i'll try and dig it out.
I would try and explain how to do it on here but I wouldn't want to get the details wrong and mess your conversion up !
I did mine with the inlet manifold removed from the car,made it very easy.
I have a list of the parts required somewhere,i'll try and dig it out.
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#8
#9
mef on here is currently converting my rails to -6an ends i also got the fittings and goodridge pipe from him, pm me if you would like his contact details, he also gets the rails nickel plated
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Here's the list of parts I used from Demon Tweeks with their part numbers and cost:
FSEIH001 8MM HIGH PRESSURE HOSE 4 METRES @ £3.55 PER METRE
FSEMTP002 METAL T-PIECE 5/16 BARBED ENDS 2 @ £3.40 EACH
LMA328 13MM PETROL PIPE CLIPS 12 @ 40P EACH
DEI010418 HEAT SHEATH ALUMINIUM SLEEVING 1/2" X 36" @ £13.58
You might not need the Aluminium sleeving but one of my fuel hoses runs very close to my 20g turbo so I thought it would be better if it was protected from the heat.
You will also need a tube cutter to cut the fuel pipes cleanly. I used one from Screwfix which cost around £3. You could just use a hacksaw but I wouldn't
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this is how i did mine, cost me about £30 not including the FPR! just cut the rails and put pipe on with 2 jubilee clips for security, worked a treat. x 2 plastic t pieces and then went too and from the fuel feeds and return with the FPR on the return. Easy.
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this is how i did mine, cost me about £30 not including the FPR! just cut the rails and put pipe on with 2 jubilee clips for security, worked a treat. x 2 plastic t pieces and then went too and from the fuel feeds and return with the FPR on the return. Easy.
Last edited by scoobysmiff; 27 November 2007 at 07:39 PM.
#15
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The O/E item works at a fixed pressure but an after market item should give you adjustable fuel pressure which is useful if you want to extend the range of your injectors a little.
The mod is not difficult as long as you have everything together before you start the work but I do question the need for it having run a number of seriously modified two litres on O/E fuel rails. ie well over 500 bhp.
The mod is not difficult as long as you have everything together before you start the work but I do question the need for it having run a number of seriously modified two litres on O/E fuel rails. ie well over 500 bhp.
#18
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I've got a parrallel fuel set up on mine.
Its a true parrallel rail setup with modified rails, reverse flow, all goodridge -6 anodised fittings, braided hoses and an SX Fuel pressure reg. Its set at 3 bar atmospheric pressure.
I use Nismo 740cc Injectors.
Here's some pics:
Its a true parrallel rail setup with modified rails, reverse flow, all goodridge -6 anodised fittings, braided hoses and an SX Fuel pressure reg. Its set at 3 bar atmospheric pressure.
I use Nismo 740cc Injectors.
Here's some pics:
Last edited by dazdavies; 17 March 2008 at 12:22 AM.
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which injectors get the fuel first; when you reverse the flow on a standard serial set up nr 3 gets the fuel first. On a parallel with reverse flow it is injectors three and one get the fuel first.
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Alright Ollie.
Mine came from Martin Fox, posts as MEF...mostly on 22b.com though. Good guy, he can supply you with the whole kit (braided hose, fittings etc), or just send your standard fuel rails off to have the fittings added.
Mine came from Martin Fox, posts as MEF...mostly on 22b.com though. Good guy, he can supply you with the whole kit (braided hose, fittings etc), or just send your standard fuel rails off to have the fittings added.
Last edited by trails; 22 March 2008 at 09:09 PM.
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Fine if you don't need your car for weeks....
He doesn't have any stock of modded rails, so I would have had to remove mine, send them off to him, and wait for them to be modded, before finally sending them back !
So I'm just fitting the regulator...
After also giving up on Mocom, RCMS, Scoobyclinic amongst others....
I can't give my hard earnt away ! LOL
DunxC
P.S. I got my hose and fittings from DT ! One stop shopping ace.
He doesn't have any stock of modded rails, so I would have had to remove mine, send them off to him, and wait for them to be modded, before finally sending them back !
So I'm just fitting the regulator...
After also giving up on Mocom, RCMS, Scoobyclinic amongst others....
I can't give my hard earnt away ! LOL
DunxC
P.S. I got my hose and fittings from DT ! One stop shopping ace.
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The O/E item works at a fixed pressure but an after market item should give you adjustable fuel pressure which is useful if you want to extend the range of your injectors a little.
The mod is not difficult as long as you have everything together before you start the work but I do question the need for it having run a number of seriously modified two litres on O/E fuel rails. ie well over 500 bhp.
The mod is not difficult as long as you have everything together before you start the work but I do question the need for it having run a number of seriously modified two litres on O/E fuel rails. ie well over 500 bhp.
Come on now, as if a bit of common sense ever puts people off throwing money at the usual yet questionable "must have" mods
#28
The parallel mod can be done very simply and cheaply:
https://www.scoobynet.com/projects-4...age-iii-5.html
#30
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Some people talk absolute rubbish on here.
My standard reg failed at around 340bhp.
It let to much fuel back to the tank and ended up with a lean cylinder and a melted piston. I'm now running circa 500bhp without issue.
For absolute certainty I'd change the standard reg for an SX, Fuel Labs or equivelant. Stay away from FSE though.
I got mine from Mocom and service was excellent with very good delivery.
My standard reg failed at around 340bhp.
It let to much fuel back to the tank and ended up with a lean cylinder and a melted piston. I'm now running circa 500bhp without issue.
For absolute certainty I'd change the standard reg for an SX, Fuel Labs or equivelant. Stay away from FSE though.
I got mine from Mocom and service was excellent with very good delivery.