Nitrous Fuel pump
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From: Southern Oklahoma
Nitrous Fuel pump I need to know if I will have enough fuel for a 250-325 shot
I have a forged ls6 motor, 55lb injectors and a 255lb walbro fuel pump.
i'll be low 400rwhp n/a and will be wanting to run a dual stage up to a
325shot.
What will my fuel system support?
I have a forged ls6 motor, 55lb injectors and a 255lb walbro fuel pump.
i'll be low 400rwhp n/a and will be wanting to run a dual stage up to a
325shot.
What will my fuel system support?
You'll need to go return and reg at the rails, a hot wire kit at minimum and maybe a BAP will be needed. Check with fuel section and there is a dual pump set-up available from one of our sponsors (Lonnies) with the return reg and hw kit you'll be good to about 1000hp.
Robert
Robert
The pump is prob good for about 600 under ideal conditions. Add a return and reg and it goes to 700+, then hw kit and or bap will extend this. I would not be spraying the hit you suggest with out getting the return and reg at the rails, to much lag time when highest demand times are at hand, so it's not just overall hp you can support, but supporting any hp the most safely you can. You may have a nasty lean spike down low, and we all know what lean and spray can do. Your injectors should support your HP goals, and the math for figuring hp per inj is in the wet vs dry thread. Good luck and let us know how things go.
Robert
Robert
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Thread Starter
11 Second Club
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From: Southern Oklahoma
I was thinking getting a custom 235 jet. I assume all these jets are RWHP.
Would I be good with a 235shot? My motor will turn to 6800. It has been turned to 7800 without a single problem.
Would I be good with a 235shot? My motor will turn to 6800. It has been turned to 7800 without a single problem.
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Verdad Gallardo This is from the rcetronics site, and is talking C5, but it runs the Walbro also, from LPE, the number not sure, but great insight into our style of fuel systems.
Technical note:
The Racetronix fuel pump in this system is capable of supporting apx. 600RWHP @ 0.5 BSFC @ 58PSI (400KPa) using factory lines. In early model C5's with rail-mounted fuel pressure regulators the above HP support can be achieved. Addition of a pump voltage booster may increase support to apx. 700RWHP. Cars with superchargers, turbos and low battery voltage may see lower HP support numbers.
Late model C5's with the returnless rail system will not be able to achieve this level of HP support with the fuel system alone.
This is because the point of regulation is at the back of the car. The location of the FPR does not allow it compensate for line
pressure drop even though the pressure is stable at the back (regulator location). There are two options to get around this problem.
First is to convert the system to a rail mounted FRP return type (best). The second option is to install a pump booster which is
activated at the point where rail pressure starts to drop. The boost in fuel volume overwhelms the regulator / return line thereby
increasing the fuel pressure at the back of the car which translates to higher pressure at the rail. We recommend the MSD unit for
FI applications as it ramps the voltage based on manifold pressure. This prevents a short but abrupt fuel pressure spike which
causes the motor to hiccup from brief over-fueling. If you are using an instant-on N2O system then the KB BAP can be considered as well.
Robert
Technical note:
The Racetronix fuel pump in this system is capable of supporting apx. 600RWHP @ 0.5 BSFC @ 58PSI (400KPa) using factory lines. In early model C5's with rail-mounted fuel pressure regulators the above HP support can be achieved. Addition of a pump voltage booster may increase support to apx. 700RWHP. Cars with superchargers, turbos and low battery voltage may see lower HP support numbers.
Late model C5's with the returnless rail system will not be able to achieve this level of HP support with the fuel system alone.
This is because the point of regulation is at the back of the car. The location of the FPR does not allow it compensate for line
pressure drop even though the pressure is stable at the back (regulator location). There are two options to get around this problem.
First is to convert the system to a rail mounted FRP return type (best). The second option is to install a pump booster which is
activated at the point where rail pressure starts to drop. The boost in fuel volume overwhelms the regulator / return line thereby
increasing the fuel pressure at the back of the car which translates to higher pressure at the rail. We recommend the MSD unit for
FI applications as it ramps the voltage based on manifold pressure. This prevents a short but abrupt fuel pressure spike which
causes the motor to hiccup from brief over-fueling. If you are using an instant-on N2O system then the KB BAP can be considered as well.
Robert