Guest vvega Posted May 28, 2008 Share Posted May 28, 2008 i was only talking about that diagram with a single reg forced your still a fucken dumbarse always looking to stir shit aye ya pathetic POS right said fred . i glad to see that sombody realised what eddie atually means thats why they fit 2 regs as per factory..on cars with parralel rails and if teh pulsing wasent a issue....why would they fit dampners currents can be visualized as water moving against the primary current to "back-fill" an abandoned space never mind waste of fucken time yet again Quote Link to comment Share on other sites More sharing options...
Steelies Posted May 28, 2008 Share Posted May 28, 2008 eddies and general flow (as opposed to pressure) characteristics will depend on manifold/rail design rather than feed/regulator/return orientation yeh..? Quote Link to comment Share on other sites More sharing options...
Guest vvega Posted May 28, 2008 Share Posted May 28, 2008 with a regulator at the end of each rail you effectively make it a one way street stopping any sort of circulatory effect as a injector fires the fuel moves to take its place with parallel rails if you fired the injectors in one direction you can make the fuel swirl though the rails in a given direction any sort of fuel turbulence etc cause pressure differentials @ the MOI thus making lag in fuel delivery and difficult fueling thats why we have dampeners ETC to reduce these effects Quote Link to comment Share on other sites More sharing options...
forced Posted May 28, 2008 Share Posted May 28, 2008 No dampeners on my motor. If the pump is running at a fixed voltage, then the total fuel flow will be constant, regardless of engine load. Quote Link to comment Share on other sites More sharing options...
Guest vvega Posted May 28, 2008 Share Posted May 28, 2008 alot of manufactures put the dampeners in the pump and no your statement in a complete load of shit flow is related to pressure and that is related to duty cycle and vacuum pressure if you have a vacuum regulator unless your running a carb then you need to fuck right off actually you need to fuck off anyways Quote Link to comment Share on other sites More sharing options...
eke_zetec_RWD Posted May 28, 2008 Author Share Posted May 28, 2008 ok this is what iv done. fuel rails are made of 20mm id stainless pipe. all fuel lines are 3/8th. regulator is rising rate 1.7 to 1. Quote Link to comment Share on other sites More sharing options...
Raizer Posted May 28, 2008 Share Posted May 28, 2008 Same set up a lot of people run on Subarus. Quote Link to comment Share on other sites More sharing options...
Testament Posted May 28, 2008 Share Posted May 28, 2008 If the pump is running at a fixed voltage, then the total fuel flow will be constant, regardless of engine load. This is more or less true assuming you voltage regulator/battery system supplies a constant voltage. alot of manufactures put the dampeners in the pumpand no your statement in a complete load of shit flow is related to pressure and that is related to duty cycle and vacuum pressure if you have a vacuum regulator unless your running a carb then you need to fuck right off actually you need to fuck off anyways It depends on the age of the vehicle if the manufacturers do anything with the pump to reduce flow under different conditions. Flow through an orifice is related to pressure - i.e. flow through the injectors Flow though the regulator is related to flow through the injectors - the more goes out the injectors, the less goes through the regulator. Or just fuckit and get a Carb - be way cooler Quote Link to comment Share on other sites More sharing options...
eke_zetec_RWD Posted May 28, 2008 Author Share Posted May 28, 2008 get a carb lol, not after the manifold i just made! plus it turbd. im sure it will work sweet as. Quote Link to comment Share on other sites More sharing options...
Guest vvega Posted May 28, 2008 Share Posted May 28, 2008 If the pump is running at a fixed voltage, then the total fuel flow will be constant, regardless of engine load. This is more or less true assuming you voltage regulator/battery system supplies a constant voltage. alot of manufactures put the dampeners in the pumpand no your statement in a complete load of shit flow is related to pressure and that is related to duty cycle and vacuum pressure if you have a vacuum regulator unless your running a carb then you need to fuck right off actually you need to fuck off anyways It depends on the age of the vehicle if the manufacturers do anything with the pump to reduce flow under different conditions. Flow through an orifice is related to pressure - i.e. flow through the injectors Flow though the regulator is related to flow through the injectors - the more goes out the injectors, the less goes through the regulator. huh ? pressure changes flow ...right so when your regulator changes the rail pressure...flow stays the same... i don't think so read what i said and understand it before you post it would also help if you understood a few more basics as well vacuum is related to engine load in a fuel circuit and vacuum controls the regulated presure so there is no way at all that you can have constant flow as the pressure is increased or decreased so many people with a opinion on things they have no idea on Ive never seen so many experts with no fucken clue Oh and look the guy thats wanted the help has made a hash of it surprise surprise Quote Link to comment Share on other sites More sharing options...
Hemi Posted May 28, 2008 Share Posted May 28, 2008 i unhooked my fuel pressure regulator ... worked good .... at about 7000rpm hammerdown. that is my story , thank you for listening Quote Link to comment Share on other sites More sharing options...
eke_zetec_RWD Posted May 28, 2008 Author Share Posted May 28, 2008 Oh and look the guy thats wanted the help has made a hash of itsurprise surprise so are you saying that the above pic wont work? Quote Link to comment Share on other sites More sharing options...
Testament Posted May 28, 2008 Share Posted May 28, 2008 If the pump is running at a fixed voltage, then the total fuel flow will be constant, regardless of engine load. This is more or less true assuming you voltage regulator/battery system supplies a constant voltage. alot of manufactures put the dampeners in the pumpand no your statement in a complete load of shit flow is related to pressure and that is related to duty cycle and vacuum pressure if you have a vacuum regulator unless your running a carb then you need to fuck right off actually you need to fuck off anyways It depends on the age of the vehicle if the manufacturers do anything with the pump to reduce flow under different conditions. Flow through an orifice is related to pressure - i.e. flow through the injectors Flow though the regulator is related to flow through the injectors - the more goes out the injectors, the less goes through the regulator. huh ? pressure changes flow ...right so when your regulator changes the rail pressure...flow stays the same... i don't think so read what i said and understand it before you post it would also help if you understood a few more basics as well vacuum is related to engine load in a fuel circuit and vacuum controls the regulated presure so there is no way at all that you can have constant flow as the pressure is increased or decreased so many people with a opinion on things they have no idea on Ive never seen so many experts with no fucken clue Oh and look the guy thats wanted the help has made a hash of it surprise surprise Ok I cocked that up a bit, wasnt thinking about the fuel pressure rising with boost. Even so, I would definitely want the fuel pump to have headroom over injector flow even at the worst case maximum boost/100% duty cycle. But really if your using 20mm ID fuel rail, I would doubt you need to bother splitting the fuel rail unless you think your going to be making 1000hp or something ridiculous. Quote Link to comment Share on other sites More sharing options...
eke_zetec_RWD Posted May 28, 2008 Author Share Posted May 28, 2008 there has to be 2 rails with my manifold as the throttle body comes out the bottom center of the plenum and the injectors are also underneith and there isnt enough clearence to remove the injectors otherwise. will get pics Quote Link to comment Share on other sites More sharing options...
peteretep Posted May 28, 2008 Share Posted May 28, 2008 what kind of flow will be going through your fuel lines? Quote Link to comment Share on other sites More sharing options...
eke_zetec_RWD Posted May 28, 2008 Author Share Posted May 28, 2008 around 3 litres per minute. Quote Link to comment Share on other sites More sharing options...
peteretep Posted May 28, 2008 Share Posted May 28, 2008 wow thats alot, probably standard for a hotted up motor though? 13 minutes fuel for an escort tank I think you should just do it, if it doesnt work like you want it to, then change it Quote Link to comment Share on other sites More sharing options...
Guest vvega Posted May 28, 2008 Share Posted May 28, 2008 1 reg per rail and your sorted.....or run the rails in series in one and out then in the other and out to the reg Quote Link to comment Share on other sites More sharing options...
Raizer Posted May 28, 2008 Share Posted May 28, 2008 From my (and plenty of other Subaru owners!!) Subaru experiences i can say it should work sweet as. Quote Link to comment Share on other sites More sharing options...
fishtailfred Posted May 28, 2008 Share Posted May 28, 2008 Ignoring most of what lies between this post and your quote : ok this is what iv done.http://img137.imageshack.us/img137/7043/fuelvg8.jpg fuel rails are made of 20mm id stainless pipe. all fuel lines are 3/8th. regulator is rising rate 1.7 to 1. Excellent, except wtf is a rising rate regulator doing within 100 feet of an engine??? Are you going to all this trouble and then hacking your fuel supply? Fixed rate of 1:1 and engine management of your choice is the way to go. Dampers are a good thing to have, but not critical. I kept mine because I'm fussy. Many throw them away and suffer no ill consequences. Fred. Quote Link to comment Share on other sites More sharing options...
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