- Messages
- 5,631
- Location
- Sydney, Australia
I'm in the process of building a fuel system to support around 600hp.
Starting at the tank I've had a sump installed with 2 x 1/2" outlets that will feed though 2 x 1/2"fuel filters into 2 Bosch 044 high performance pumps.
The pumps will run through 2 x 30amp relays wired directly from the battery (it's only 500mm away from the pumps).
I'm going to treat the engine like 2 x 4 cylinder engines by running 2 fuel lines (1 to fuel rail) with a balance pipe running to a Malpasi rising rate regulator.
My problem is sizing it all.
THe outlet of the Bosch 044 is via a banjo fitting that is only 5.3mm in diameter. This gives across section of 8.8 square mm. I find this surprisingly small to flow the 700hp these pumps are supposed to flow.
I plan to replace the banjo with something around 7mm which will give ma a cross section of 15.4 square mm which is looking much better.
I then plan on using fule line of around 9mm internal diameter. This allows for a little surface friction inside the rail.
The fuel line will enter the standard rails at the rear using 7mm bangos and the factory banjo bolt (which I've bored out to 7mm)
The front of the rails will be joined by similar sized banjos and fuel line.
One thought the inlet and outlet on the Malpasi is only around 5mm but it should be OK as a return.
All fuel line will be high pressure fuel line, but I'm not getting fancy with Earls fittings etc.
Can anyone tell me what I've missed or if I have it wrong?
Starting at the tank I've had a sump installed with 2 x 1/2" outlets that will feed though 2 x 1/2"fuel filters into 2 Bosch 044 high performance pumps.
The pumps will run through 2 x 30amp relays wired directly from the battery (it's only 500mm away from the pumps).
I'm going to treat the engine like 2 x 4 cylinder engines by running 2 fuel lines (1 to fuel rail) with a balance pipe running to a Malpasi rising rate regulator.
My problem is sizing it all.
THe outlet of the Bosch 044 is via a banjo fitting that is only 5.3mm in diameter. This gives across section of 8.8 square mm. I find this surprisingly small to flow the 700hp these pumps are supposed to flow.
I plan to replace the banjo with something around 7mm which will give ma a cross section of 15.4 square mm which is looking much better.
I then plan on using fule line of around 9mm internal diameter. This allows for a little surface friction inside the rail.
The fuel line will enter the standard rails at the rear using 7mm bangos and the factory banjo bolt (which I've bored out to 7mm)
The front of the rails will be joined by similar sized banjos and fuel line.
One thought the inlet and outlet on the Malpasi is only around 5mm but it should be OK as a return.
All fuel line will be high pressure fuel line, but I'm not getting fancy with Earls fittings etc.
Can anyone tell me what I've missed or if I have it wrong?