Boost Referenced Fuel Pressure Regulator
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Anyone experience that a boost referenced fuel pressure regulator cant handle a second pump coming on without spiking fuel pressure above 80psi?
i.e. Primary pump on speed controller, second fuel pump on hobbs switch. Under 5# of boost secondary fuel pump comes on and spikes fuel pressure. Primary Aeromotive A1000 can't handle 60psi alone.
Do I simply need a larger single primary pump or is my regulator the issue?
i.e. Primary pump on speed controller, second fuel pump on hobbs switch. Under 5# of boost secondary fuel pump comes on and spikes fuel pressure. Primary Aeromotive A1000 can't handle 60psi alone.
Do I simply need a larger single primary pump or is my regulator the issue?
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Originally Posted by APD*98SS
Anyone experience that a boost referenced fuel pressure regulator cant handle a second pump coming on without spiking fuel pressure above 80psi?
i.e. Primary pump on speed controller, second fuel pump on hobbs switch. Under 5# of boost secondary fuel pump comes on and spikes fuel pressure. Primary Aeromotive A1000 can't handle 60psi alone.
Do I simply need a larger single primary pump or is my regulator the issue?
i.e. Primary pump on speed controller, second fuel pump on hobbs switch. Under 5# of boost secondary fuel pump comes on and spikes fuel pressure. Primary Aeromotive A1000 can't handle 60psi alone.
Do I simply need a larger single primary pump or is my regulator the issue?
A bit about how the system is plumbed, and specific parts used, may help.
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I have the Rick's Hot Rod Shop Stainless steel tank with two internal Aeromotive A1000's. Two internal 100 micron filters feed to -10AN lines through one way check valves. From there -10AN y block to one -10AN feed line to the engine compartment. From there a -10AN to -8AN y block split to two fuel rails. The fuel rails exit to both sides of the B.R.F.P.R. The bottom of the regulator is a -8AN all the way back to the tank.
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what for regulator do you have on there? the A1000 regulator only has a 6 an line out the bottom so that would restrict the flow and it couldnt handle 2 a1000s. the pro series 13110 could handle the flow. a A1000 should be good for 800HP on FI car, with 2 a1000s tho I would think you should have a 10 return line they want a 10 return on an eliminator pump with the pro series 13110 regulator.
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I have the 13110 Pro Series Regulator. However I have trouble seeing 60psi of pressure on the primary A1000 which is speed controlled even if I flip the switch to go full voltage. It barely holds 58-60 psi and as soon as I hit the gas on moderate acceleration the pressure dips to about 45psi. Is it possible a single A1000 is not sufficient for my setup? I have adjusted the speed controller to go full throttle at just about 1700- 1800 rpm. I am truly debating following Bob's suggestion along with other threads I have read on simply having a single pump that flows suficiently for my application like the Aeromotive 11104. My take already has provisions for two -10AN fittings. Instead of using them both for feeds I can use one for feed and the other for a return. And one pump means no more fuel spikes no more black smoke under boost and no more ugly a*s VE Tables. What do you think???
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Originally Posted by lethal93ta
what for regulator do you have on there? the A1000 regulator only has a 6 an line out the bottom so that would restrict the flow and it couldnt handle 2 a1000s. the pro series 13110 could handle the flow. a A1000 should be good for 800HP on FI car, with 2 a1000s tho I would think you should have a 10 return line they want a 10 return on an eliminator pump with the pro series 13110 regulator.
A quik test for the return and reg flow capacity:
Turn on the pumps, attempt to lower the Fp by about 5psi.. Goes, UR OK. Not, you need to look at the reg,[As mentioned by Lethal93], and lines, location of the return at the tank, etc.
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Originally Posted by APD*98SS
I have the 13110 Pro Series Regulator. However I have trouble seeing 60psi of pressure on the primary A1000 which is speed controlled even if I flip the switch to go full voltage. It barely holds 58-60 psi and as soon as I hit the gas on moderate acceleration the pressure dips to about 45psi. Is it possible a single A1000 is not sufficient for my setup? I have adjusted the speed controller to go full throttle at just about 1700- 1800 rpm. I am truly debating following Bob's suggestion along with other threads I have read on simply having a single pump that flows suficiently for my application like the Aeromotive 11104. My take already has provisions for two -10AN fittings. Instead of using them both for feeds I can use one for feed and the other for a return. And one pump means no more fuel spikes no more black smoke under boost and no more ugly a*s VE Tables. What do you think???
Last edited by lethal93ta; 01-07-2007 at 12:42 PM.
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the a1000 system wants a 10 an line feeding the pump witch you have, to the a1000 regulator with a 6 return it could be that with teh bigger regulator and return line to much is going back then when the second pump comes on the 8 an line you have isnt enough sence they want a 10 an return line with the 11104 set up. I would think that 2 a1000s would move more fuel than 1 11104
your best bet might be to get a 11104 pump sence you already have the regulator for it just up your return line size to a 10 your feed to the pump to a 12 and the bigger filter before the pump
![](http://www.aeromotiveinc.com/images/diagram_13.gif)
your best bet might be to get a 11104 pump sence you already have the regulator for it just up your return line size to a 10 your feed to the pump to a 12 and the bigger filter before the pump
![](http://www.aeromotiveinc.com/images/diagram_13.gif)
![](http://www.aeromotiveinc.com/images/diagram_14.gif)
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I originally had a 13101 regulator and Bret over at Aeromotive told me that it could not handle the 2 A1000 pumps. the design of the two pump setup is all Aeromotives'. I only followed his recomedations from my original setup. Ever since the two pump deal, things have never been 100% right. I have attached pictures of my oroginal setup.
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I have to pose this question: If you have adequately sized fuel feed and return lines along with proper fuel pumps and regulators that match your setup should fuel pressure remain constant no matter if the individual fuel pupms are triggered in series, parrallel, or individual triggers based on boost levels???
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Yes I ran it that way when I had a D1SC blower and before the motor was stroked, and fuel pressure was fine. It never leaned out with SVO 42#'ers; however, I was told that my current fuel system would be inadequate with the larger blower along with the stroked 382.8 cubic inch motor. So I made the switch.
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I would call aeromotive, but my thoughts are that the regulator is to much for just one a1000 its letting to much fuel return.that why you cant get enough pressure even with the controler switch on. when the second one kicks in the return line isnt big enough to handle all the fuel. I would still think a 11104 pump would be better than trying to mess with what you got now.eather way you should upgrade your return to a -10 line.
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Originally Posted by APD*98SS
I have the Rick's Hot Rod Shop Stainless steel tank with two internal Aeromotive A1000's. Two internal 100 micron filters feed to -10AN lines through one way check valves. From there -10AN y block to one -10AN feed line to the engine compartment. From there a -10AN to -8AN y block split to two fuel rails. The fuel rails exit to both sides of the B.R.F.P.R. The bottom of the regulator is a -8AN all the way back to the tank.
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Originally Posted by APD*98SS
I have the 13110 Pro Series Regulator. However I have trouble seeing 60psi of pressure on the primary A1000 which is speed controlled even if I flip the switch to go full voltage. It barely holds 58-60 psi and as soon as I hit the gas on moderate acceleration the pressure dips to about 45psi. Is it possible a single A1000 is not sufficient for my setup? I have adjusted the speed controller to go full throttle at just about 1700- 1800 rpm. I am truly debating following Bob's suggestion along with other threads I have read on simply having a single pump that flows suficiently for my application like the Aeromotive 11104. My take already has provisions for two -10AN fittings. Instead of using them both for feeds I can use one for feed and the other for a return. And one pump means no more fuel spikes no more black smoke under boost and no more ugly a*s VE Tables. What do you think???
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Originally Posted by APD*98SS
I have the 13110 Pro Series Regulator. However I have trouble seeing 60psi of pressure on the primary A1000 which is speed controlled even if I flip the switch to go full voltage. It barely holds 58-60 psi and as soon as I hit the gas on moderate acceleration the pressure dips to about 45psi. Is it possible a single A1000 is not sufficient for my setup? I have adjusted the speed controller to go full throttle at just about 1700- 1800 rpm. I am truly debating following Bob's suggestion along with other threads I have read on simply having a single pump that flows suficiently for my application like the Aeromotive 11104. My take already has provisions for two -10AN fittings. Instead of using them both for feeds I can use one for feed and the other for a return. And one pump means no more fuel spikes no more black smoke under boost and no more ugly a*s VE Tables. What do you think???
Its gonna go black with 80psi on the gauge. The vaccum is no longer there as the regulator is under boost and supplying the fuel. Sounds to me that the system is working 100% as advertised. After all, think about what a BOOST REFERENCE regulator is supposed to do. Supply more FUEL under boost. If the black smoke bothers you, fix the tuning some. Black smoke will never go completely away but adjusting the injector tables will fix some of that issue. You could ditch the boost reference FMU setup and do it all on demand via the PCM. I dont suggest this way but it can be done.
Last edited by V6 Bird; 01-08-2007 at 01:13 PM.
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If you street drive a lot, I would not go with a super large single pump since you will return a lot of fuel to the tank while cruising....and the fuel will get hotter and hotter.
How much boost are you running?
I have Rick's tank also, but designed it for two 044 Bosch pumps. One runs all the time, one kicks on at 5psi via Hobbs. Brought two -8's to a Y. Single -8 to another Y at the rails. Split into to -8's at the back of the rails. A -8 from the front of each rail to a WELDON brfpr and a single -6 back to the tank.
Single Bosch pump holds a steady 70psi at idle, then ramps up 1:1 via boost up to 90psi to push enough fuel through the 60lb Mototrons.
I'd try a WELDON regulator first if it's spiking to 80psi at soon as the Hobbs kicks in...easy to do and easy to sell a regulator if it does not fix the problem.....some regulators can not handle the kind of volume two Aeros will hit with.
How much boost are you running?
I have Rick's tank also, but designed it for two 044 Bosch pumps. One runs all the time, one kicks on at 5psi via Hobbs. Brought two -8's to a Y. Single -8 to another Y at the rails. Split into to -8's at the back of the rails. A -8 from the front of each rail to a WELDON brfpr and a single -6 back to the tank.
Single Bosch pump holds a steady 70psi at idle, then ramps up 1:1 via boost up to 90psi to push enough fuel through the 60lb Mototrons.
I'd try a WELDON regulator first if it's spiking to 80psi at soon as the Hobbs kicks in...easy to do and easy to sell a regulator if it does not fix the problem.....some regulators can not handle the kind of volume two Aeros will hit with.
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To the first question, V6 Bird; NO the vacuum line is not hooked up at this time. So the fuel pressure should be at a constant 60psi right???
Secondly, to Onfire; when both pumps are on you do you have any issues with the return line inadequate for that much volume in a -6AN line???
FInally if a speed controller is used with the Eliminator pump that should resolve the overheatig issue don't you think???
Secondly, to Onfire; when both pumps are on you do you have any issues with the return line inadequate for that much volume in a -6AN line???
FInally if a speed controller is used with the Eliminator pump that should resolve the overheatig issue don't you think???
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[QUOTE=V6 Bird]Your sump has 2 fittings in it at the rear. They are both to feed. Not one for return and one for feed. It doesnt work that way man.
I was attempting to solve an issue on moving to one single pump. I understand the tank has two (2) outlets or feed lines, however since the Eliminator Pump requires both -10AN feed and return lines to prevent additional welding and or cutting on my tank I improvised in placement on what was available to use without further modification. With that being said, do you think it would work???
I was attempting to solve an issue on moving to one single pump. I understand the tank has two (2) outlets or feed lines, however since the Eliminator Pump requires both -10AN feed and return lines to prevent additional welding and or cutting on my tank I improvised in placement on what was available to use without further modification. With that being said, do you think it would work???
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Originally Posted by APD*98SS
To the first question, V6 Bird; NO the vacuum line is not hooked up at this time. So the fuel pressure should be at a constant 60psi right???
Secondly, to Onfire; when both pumps are on you do you have any issues with the return line inadequate for that much volume in a -6AN line???
FInally if a speed controller is used with the Eliminator pump that should resolve the overheatig issue don't you think???
Secondly, to Onfire; when both pumps are on you do you have any issues with the return line inadequate for that much volume in a -6AN line???
FInally if a speed controller is used with the Eliminator pump that should resolve the overheatig issue don't you think???
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