tiznodd
10-22-2011, 09:02 AM
Hello all,
I have been scouring the internet for weeks trying to figure out what the right solution to my fuel tank/pump dilemma. I spent an untold amount of time trying to modify a factory tank to work with twin in-tank Walbro 255 pumps, similar to how the 4th gen guys do it, only to have the tank fail miserably as a result of my poor welds. It was all in the name of saving money, but after reading it looks like it would have failed regardless because I had no baffling system setup and I don't want to run a full tank at all times. So now I have 2 Walbro 255 pumps, a completed feed/return line system, a manual Weldon pressure regulator near the fuel rails and completed wiring set to activate the 2nd pump from a pressure hobbs switch - I really don't want to scrap all of that work.
The vehicle is a 1967 Camaro with an LS based 6.0 and a 76mm turbocharger. The fuel system needs to be able to handle approximately 900hp. The reality is that I will probably run it at a lower power level, but I don't want to do this twice.
Some of the issues I can't make sense of are as follows:
It seems that the fuel pressure is internally regulated to 58psi. My tuner wants the pressure set at 50 base, and it's boost referenced, which means I would need the pressure to be able to increase to at least 66 psi. I believe the 255 Walbro pumps keep pressure in the line upwards of 70-80psi. Is there a way to bypass the regulator on the 5th gen modules all together?
The next issue is that it seems a computer module is needed to run twin pumps. They are set from the factory to run at the same time and they vary the duty cycle as demand changes. Is it possible to run as I originally intended and simply activate the second pump once positive manifold pressure is reached?
Can I use my current Walbro pumps in a fuel module? Should I?
Will the Venturi pump keep the module full with my fuel demand?
The only thing which seems certain is that I plan to use a Rick's Tank. I really like the Vaporworx setup, but if it comes down to me using an aftermarket fuel module, I might be $2500 deep in just a tank/pumps, which is a hard pill to swallow.
I'm completely at a loss here and this is the last frontier for my project. It should start once I install a tank/pump. Any help would be greatly appreciated, even if that means I need to re-evaluate the entire system.
Thanks,
Todd
I have been scouring the internet for weeks trying to figure out what the right solution to my fuel tank/pump dilemma. I spent an untold amount of time trying to modify a factory tank to work with twin in-tank Walbro 255 pumps, similar to how the 4th gen guys do it, only to have the tank fail miserably as a result of my poor welds. It was all in the name of saving money, but after reading it looks like it would have failed regardless because I had no baffling system setup and I don't want to run a full tank at all times. So now I have 2 Walbro 255 pumps, a completed feed/return line system, a manual Weldon pressure regulator near the fuel rails and completed wiring set to activate the 2nd pump from a pressure hobbs switch - I really don't want to scrap all of that work.
The vehicle is a 1967 Camaro with an LS based 6.0 and a 76mm turbocharger. The fuel system needs to be able to handle approximately 900hp. The reality is that I will probably run it at a lower power level, but I don't want to do this twice.
Some of the issues I can't make sense of are as follows:
It seems that the fuel pressure is internally regulated to 58psi. My tuner wants the pressure set at 50 base, and it's boost referenced, which means I would need the pressure to be able to increase to at least 66 psi. I believe the 255 Walbro pumps keep pressure in the line upwards of 70-80psi. Is there a way to bypass the regulator on the 5th gen modules all together?
The next issue is that it seems a computer module is needed to run twin pumps. They are set from the factory to run at the same time and they vary the duty cycle as demand changes. Is it possible to run as I originally intended and simply activate the second pump once positive manifold pressure is reached?
Can I use my current Walbro pumps in a fuel module? Should I?
Will the Venturi pump keep the module full with my fuel demand?
The only thing which seems certain is that I plan to use a Rick's Tank. I really like the Vaporworx setup, but if it comes down to me using an aftermarket fuel module, I might be $2500 deep in just a tank/pumps, which is a hard pill to swallow.
I'm completely at a loss here and this is the last frontier for my project. It should start once I install a tank/pump. Any help would be greatly appreciated, even if that means I need to re-evaluate the entire system.
Thanks,
Todd