Help with fuel pump controller.
Thread Starter
On The Tree
Joined: Feb 2011
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Help with fuel pump controller. I have LS1 retrofit in my Nova and PSI harness sends relayed +12v-14,5V to fuelpump which is walbro 255 inline version. It make so terrible noise with normal current so i resisted the current to +9,5V and its been fine and quiet for few years with stock engine.
Now when im gonna make more power out of the engine i want to release fuelpump full capacity and i want to add fuel pump controller and dump those resistors.
What kind of controllers you are using and where you are getting signal for the controller??
I have found several controllers online, but not so sure how easy its to use with my set up. Specially to be sure with input signal.
Now when im gonna make more power out of the engine i want to release fuelpump full capacity and i want to add fuel pump controller and dump those resistors.
What kind of controllers you are using and where you are getting signal for the controller??
I have found several controllers online, but not so sure how easy its to use with my set up. Specially to be sure with input signal.
Thread Starter
On The Tree
Joined: Feb 2011
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Pump came with PSI as my harness, regulator and plummings. Hard to say the real origin of the pump. I dont blame the pump. I can imagine that almost every pump is in trouble if you put full voltage in it and need for fuel is almost zero at idle without return line.
Thread Starter
On The Tree
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I end up ordering this today. Lets see what it does.
http://www.easyperformance.com/produ...p-sensor-input
http://www.easyperformance.com/produ...p-sensor-input
Thread Starter
On The Tree
Joined: Feb 2011
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Its a PWM unit. Its the only controller what i found, where you can tune it easily with potentiometers. Initial power, start map and full map can be set the way you want, so i think its perfect for me. Im going to take input signal from TPS. It controls pump with narrow +12V pulses in idle and WOT its flat line +12V
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Thread Starter
On The Tree
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I use this type of regulator, its with return line.
http://www.ebay.com/itm/99-04-C5-CORVETTE-OEM-GM-FUEL-FILTER-PRESSURE-REGULATOR-/260511946044?pt=Motors_Car_Truck_Parts_Accessories&hash=item3ca7b8d53c
http://www.ebay.com/itm/99-04-C5-CORVETTE-OEM-GM-FUEL-FILTER-PRESSURE-REGULATOR-/260511946044?pt=Motors_Car_Truck_Parts_Accessories&hash=item3ca7b8d53c
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From: Norn Iron
If you have a regulator, then that should take care of the return. If you dont have a regulator, then you will need proper electronic PWM control of pump speed at all times.
I can see no sensible reason ever to just randomly drop pump voltage to say 9v.
Thread Starter
On The Tree
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Thanks stevieturbo for reply! I have thought also possibility that i have something wrong with my routings. I use vacuum pump to fill the collectortank which goes to regulator and to the inline pump. Regulator return line goes to collectortank and collectortank have line to fuel tank with about 3mm restrictor. Restrictor is for the vacuum pump. Without it, vacuumpump pumps it self to death. Maybe the returnline from the regulator should go straight to fuel tank instead to collectortank?
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From: Norn Iron
You're making references to vacuum pumps, regulators, collector tanks etc.
Draw a schematic of the entire system, it will make it easier to try and help when the exact layout/build of the system is known.
Draw a schematic of the entire system, it will make it easier to try and help when the exact layout/build of the system is known.
TECH Enthusiast
Joined: Mar 2013
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http://www.radiumauto.com/Multi-Pump...Tank-P271.aspx
You are doing it the same as Radium with the exception of the regulator being before the fuel rails which as I understand it is a matter of preference. Watch the video about half way down.
You are doing it the same as Radium with the exception of the regulator being before the fuel rails which as I understand it is a matter of preference. Watch the video about half way down.
Thread Starter
On The Tree
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My vacuum pump is Facet red top and without backpressure it pumps like crazy. Thats why i have restrictor.
https://www.pegasusautoracing.com/pr...asp?RecID=8462
Im thinking there could lie my problem too with my walbro. It might need more pressure free flow from regulator.
Well, i have already ordered fuelpump controller. At least i have some options now.
https://www.pegasusautoracing.com/pr...asp?RecID=8462
Im thinking there could lie my problem too with my walbro. It might need more pressure free flow from regulator.
Well, i have already ordered fuelpump controller. At least i have some options now.
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From: Norn Iron
The schematic is fine. But why do you have a restrictor in the return from swirl tank to main tank ?
And by vacuum pump...surely you mean some sort of lift pump ?
You want the low pressure pump to have flow ability, remove the restrictor from the return. It should not be there. There is no need for silly controllers in such a setup either.
How far is it from reg to rails ? What size hoses etc ?
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From: Norn Iron
What would concern me though is the Facet. It states approx 38gph ?
ie US gallon is approx 4 litres ? So that lift pump can only flow 152lph.
So no way in hell can it keep up with the walbro once the engine is above say 350-400hp. The swirl tank will be emptying.
You need a far better lift pump. One of the basic Carter/Federal Moghul pumps would be far better suited than the Facet.
ie US gallon is approx 4 litres ? So that lift pump can only flow 152lph.
So no way in hell can it keep up with the walbro once the engine is above say 350-400hp. The swirl tank will be emptying.
You need a far better lift pump. One of the basic Carter/Federal Moghul pumps would be far better suited than the Facet.