1000+ external street pump
01-23-2009, 01:29 PM
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1000+ external street pump Maxed out the Aeromotive A1000 and need a bigger and better one!! This one heated fuel like crazy...
What about the fuelab pumps?
What about the fuelab pumps?
01-23-2009, 04:40 PM
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Something definatley wrong there if your signature is an accurate representation of your setup. I have never liked external pumps. But that thing flows 600lb/hr and you maxed it out... What does your in-tank setup look like?
01-24-2009, 02:22 AM
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I guess I need to update the sig... Yes I maxed the injectors and had plenty of pump. I no longer run the procharger and am currently building the same 370 with twin TC78's, turbosmart wastegate's, and raceport BOV. I am going to be using the High impedence 83lb/hr injectors. I need enough pump to run these at a full 60+ psi. and my lord one that wont heat the hell out of the fuel!!!!!
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01-24-2009, 11:32 AM
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01-25-2009, 02:40 PM
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Bob, I am using the stock feed line as my return. This is boost referenced and I use a -10 for the feed all the way to the regulator ans slightly smaller from the regulator to the rails
01-25-2009, 09:28 PM
#10
I'm sure you must have just typed it wrong, because the way your post says you piped it is: Your feed line comes from the pump, feeds to the outlet of the regulator, and the inlets to the regulator feed the rails? Please correct me, because I think you would have no fuel pressure in the rails.
01-26-2009, 09:04 AM
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The line size has nothing to do with keeping the pump cool but it does keep the pump from working over time to pull fuel through a smaller line (smaller line = more restriction). Now here is a Mr. Wizard lesson for everyone that wants to learn.
The fuel system in your car is a return style fuel system. Fuel is being pumped through fuel rails attached to a hot engine where heat is transfered to the rails. The fuel passes through the rails which takes the heat out of the rails and puts it in the fuel. This hot fuel is then returned to the tank. With the large volume of fuel the Aeromotive unit puts out, the more fuel that gets passed through the hot rail and back to the tank (2 gallons a minute). Now take your car on a 45min cruise. If you had 15 gallons in your tank when you started the cruise you put the contents of the tank through the engine bay every 7.5 minutes. So on your 45min cruise you recirculated the contents of your tank 6 times! And that's if you didn't burn any fuel. So it will be around 7-7.5 times in your 45min cruise. Now that we have established where heat in the system comes from, let talk about how it effects the pump and line size.
Here is where Mr. Wizard comes in handy. When a hot liquid is placed in a vacuum it lowers its boiling point (the point when it changes from liquid to vapor). All fuel pumps make vacuum to prime themselfs (some more than others). Now take that pump that makes vacuum, place a smaller restrictive feed line on it so it has to make move vacuum to over come the restiction and you now have turned your hot fuel into vapor (air). Now lets take and place a restrictive filter on a system that is already restricted and see what happens. The fuel pump has to make more vacuum to over come the restriction in the system. This in turn lowers the point in which fuel will turn to vapor. So you get less drive time before your pump vapor locks.
01-26-2009, 01:37 PM
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If I was going to drive a 1000+ hp car on the street I would use this system (Aeromotive).
12302 - Prefilter
11104 - Fuel Pump (good for 1400hp)
12310 - postfilter
16306 - Fuel pump controller (New advanced model)
I would only recommend using this system if you have a sumped tank or fuel cell. Pump must also be feed with a 12AN line.
12302 - Prefilter
11104 - Fuel Pump (good for 1400hp)
12310 - postfilter
16306 - Fuel pump controller (New advanced model)
I would only recommend using this system if you have a sumped tank or fuel cell. Pump must also be feed with a 12AN line.
01-26-2009, 04:24 PM
#14
We have had pumps run hot and solved the problem by runnnig a -10 return line. I am not worried about the fuel being hot, I am worried about the pump being hot. if the pump has to work overtime because of a restriction, it is going to get hot. Bob
01-26-2009, 05:05 PM
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Bob,
Since fuel flows through the pump and electric motor, it would be odd to have a hot pump and not hot fuel. Fuel acts like coolant for the pump. I've seen first hand testing with Aeromotive pumps on a test stand with a 5 gallon cell. The system was set at 60psi and left on for over 2000 straight hours. Keep in mind this was a closed system on 5 gallons. The system did build mild heat but nothing that effected the performance of the pump.
The only thing going to a larger return line would do is to add more surface area to help disapate heat before it got back to the tank. You basically turned the return line into a radiator. I've seen this work as it did in your case but it but most of the time it will not solve the issue. Heat comes from the rail and not the pump. I bet if you took a temp gauge to a closed system and measured the temp it would not be as hot as the rails attached to a hot engine incased in an engine bay.
Since fuel flows through the pump and electric motor, it would be odd to have a hot pump and not hot fuel. Fuel acts like coolant for the pump. I've seen first hand testing with Aeromotive pumps on a test stand with a 5 gallon cell. The system was set at 60psi and left on for over 2000 straight hours. Keep in mind this was a closed system on 5 gallons. The system did build mild heat but nothing that effected the performance of the pump.
The only thing going to a larger return line would do is to add more surface area to help disapate heat before it got back to the tank. You basically turned the return line into a radiator. I've seen this work as it did in your case but it but most of the time it will not solve the issue. Heat comes from the rail and not the pump. I bet if you took a temp gauge to a closed system and measured the temp it would not be as hot as the rails attached to a hot engine incased in an engine bay.
01-27-2009, 07:40 AM
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01-27-2009, 09:00 AM
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That quote you pulled from me is in referrence to the suction side line, not the return. You are comparing apples and oranges now. A small inlet line will starve the pump (run dry) and of course it will get hot because it's running dry. Start a engine with no oil and see if it gets hot.
