Well
I was gonna go with the Bosch 070, which will flow 130 L/hr at 3 Bar (43.5 psi)
But according to the FSM, the RS Lib fuel pump flows over 150 L/hr at 3 Bar
Does this mean that the Bosch 070 may fall short at high loads?
The Bosch 046 would be ideal, with 207 L/hr at 3 Bar, but is pretty uncommon
The other common model is the 044 (Commodore VL Turbo), which will supply 200 L/hr at 5 Bar (72.5 psi)
The 044 has screw in fittings so adapters will be needed, M18 for the inlet and M12 for the outlet.
What do you (those of you with an L Series with an EJ turbo motor) normally use?
EFI fuel pumps for EJ conversions.
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Gannon
- Senior Member
- Posts: 4580
- Joined: Sat Nov 05, 2005 10:00 am
- Location: Bowraville, Mid Nth Coast, NSW
EFI fuel pumps for EJ conversions.
Current rides: 2016 Mitsubishi Triton GLS & 2004 Forester X
Ongoing Project/Toy: 1987 RX Turbo EA82T, Speeduino ECU, Coil-pack ignition, 440cc Injectors, KONI adjustale front struts, Hybrid L Series/ Liberty AWD 5sp
Past rides: 92 L series turbo converted wagon, 83 Leone GL Sedan, 2004 Liberty GT Sedan & 2001 Outback
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Ongoing Project/Toy: 1987 RX Turbo EA82T, Speeduino ECU, Coil-pack ignition, 440cc Injectors, KONI adjustale front struts, Hybrid L Series/ Liberty AWD 5sp
Past rides: 92 L series turbo converted wagon, 83 Leone GL Sedan, 2004 Liberty GT Sedan & 2001 Outback
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The flow rate of a positive displacement pump (such as a fuel pump) varies with pressure. Pressure comes from the fuel pressure regulator, so varies with manifold pressure. The discrete numbers you have don't mean a lot - the only way to compare pumps is with pressure/volume graphs.
Seeing as you probably won't find such graphs, you could work out a maximum reasonable fuel burn rate, and find a pump that will at least match that at your engine's max fuel pressure (in the order of 200kPa for NA engines, yours might be more).
And btw, those flow rate numbers are litres/hour, not per minute.
In my EJ22ed L series I use a VL Commodore fuel pump. It has a 12mm barbed inlet and 8mm barbed outlet. Works a treat.
Incidentally, VL turbos use the same fuel pumps as a povo pack RB30E VL wagon, and the same external one is listed for EFI VKs, Camiras, V8 VNs, XFs and various old BMWs. Go and ask for a JD Camira part and you might get a sympathy discount.
Dane.
Seeing as you probably won't find such graphs, you could work out a maximum reasonable fuel burn rate, and find a pump that will at least match that at your engine's max fuel pressure (in the order of 200kPa for NA engines, yours might be more).
And btw, those flow rate numbers are litres/hour, not per minute.
In my EJ22ed L series I use a VL Commodore fuel pump. It has a 12mm barbed inlet and 8mm barbed outlet. Works a treat.
Incidentally, VL turbos use the same fuel pumps as a povo pack RB30E VL wagon, and the same external one is listed for EFI VKs, Camiras, V8 VNs, XFs and various old BMWs. Go and ask for a JD Camira part and you might get a sympathy discount.
Dane.
[SIGPIC][/SIGPIC]
1993 EA82/EJ18/EJ22/EJ22/EJ20/EJ22 L Series perpetual project
1993 EA82/EJ18/EJ22/EJ22/EJ20/EJ22 L Series perpetual project
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Gannon
- Senior Member
- Posts: 4580
- Joined: Sat Nov 05, 2005 10:00 am
- Location: Bowraville, Mid Nth Coast, NSW
Fixed. I knew in my head they were per hour, but for some reason wrote per minuteAnd btw, those flow rate numbers are litres/hour, not per minute.
Yeah i realise that the flow varies with pressure, thats why i compared the 070 with the factory RS pump, 130 L/hr vs. 150 L/hr, both at 3 Bar
The 044 flows 200 L/hr at 5 Bar, so assumingly, its gonna flow more at only 3 Bar
I was guessing that the 044 with barbed fittings was the go, but just thought id ask in case there was an obvious option that i had missed.
Current rides: 2016 Mitsubishi Triton GLS & 2004 Forester X
Ongoing Project/Toy: 1987 RX Turbo EA82T, Speeduino ECU, Coil-pack ignition, 440cc Injectors, KONI adjustale front struts, Hybrid L Series/ Liberty AWD 5sp
Past rides: 92 L series turbo converted wagon, 83 Leone GL Sedan, 2004 Liberty GT Sedan & 2001 Outback
------------------------------------------
Ongoing Project/Toy: 1987 RX Turbo EA82T, Speeduino ECU, Coil-pack ignition, 440cc Injectors, KONI adjustale front struts, Hybrid L Series/ Liberty AWD 5sp
Past rides: 92 L series turbo converted wagon, 83 Leone GL Sedan, 2004 Liberty GT Sedan & 2001 Outback
------------------------------------------
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discopotato03
- Senior Member
- Posts: 2134
- Joined: Sun Mar 18, 2007 9:29 am
- Location: Sydney
Most opt for the VT Turbo pump in an EFI L Series because its common cost effective and goes in really easily .
Most EFI fuel pump systems including Ls do a high/low voltage thing switched by the computer to make them quieter at idle . Also using too much pump means a lot more fuel is cycling from the tank to the reg and going back to the tank again , issue is it picks up heat from the steel lines on the engine and heats the fuel up over time . Result is high gas pressure in the fuel tank and pump cavitation issues .
The Bosch "044" is way too much pump unless you are serious about making a LOT of power with big turbos and injectors .
Don't go overboard with EFI pumps because you create problems that could have been avoided .
A .
Oh and buy the way those pumps being mentioned ie 975 044 etc are old Bosh K Jetronic mechanical fuel injections units that needed higher pressure than the L Jetronic based systems used in only everything up until a few years ago . From memory the 975 was OE on some Porsches and I think the 044 was used on a Mercedes V8 .
Not new technology by any stretch but useful in true high output engines .
Most people size EFI pumps around the horsepower that the fuel volume can support , you'll know if the pump isn't enough because with the regulator closed right up the pressure starts to drop . The VLts made 153 Kw bog std and the pump was enough for a little more too - out of 6 injectors . More than enough for an EJ turbo unless you start to modify it for more power .
One thing you want to be VERY sure of is that you don't get voltage drop in the electrical system powering the pump . One thing that very much effects EFI fuel pump performance is its supply voltage , it needs to be as close to alternator output voltage as possible to perform properly . Do a voltage check on a running car/pump with the computer giving it the high voltage mode , if the measured voltage is low low do something about it .
Most EFI fuel pump systems including Ls do a high/low voltage thing switched by the computer to make them quieter at idle . Also using too much pump means a lot more fuel is cycling from the tank to the reg and going back to the tank again , issue is it picks up heat from the steel lines on the engine and heats the fuel up over time . Result is high gas pressure in the fuel tank and pump cavitation issues .
The Bosch "044" is way too much pump unless you are serious about making a LOT of power with big turbos and injectors .
Don't go overboard with EFI pumps because you create problems that could have been avoided .
A .
Oh and buy the way those pumps being mentioned ie 975 044 etc are old Bosh K Jetronic mechanical fuel injections units that needed higher pressure than the L Jetronic based systems used in only everything up until a few years ago . From memory the 975 was OE on some Porsches and I think the 044 was used on a Mercedes V8 .
Not new technology by any stretch but useful in true high output engines .
Most people size EFI pumps around the horsepower that the fuel volume can support , you'll know if the pump isn't enough because with the regulator closed right up the pressure starts to drop . The VLts made 153 Kw bog std and the pump was enough for a little more too - out of 6 injectors . More than enough for an EJ turbo unless you start to modify it for more power .
One thing you want to be VERY sure of is that you don't get voltage drop in the electrical system powering the pump . One thing that very much effects EFI fuel pump performance is its supply voltage , it needs to be as close to alternator output voltage as possible to perform properly . Do a voltage check on a running car/pump with the computer giving it the high voltage mode , if the measured voltage is low low do something about it .