Help with LS7 Fuel System. Returnless or Return line?
12-06-2011, 12:26 AM
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Help with LS7 Fuel System. Returnless or Return line? I am installing an LS7 in my Pontiac and need some help to configure the fuel system. I have the factory LS7 intake, fuel rails, and 42lb LS7 injectors. I would like to retain the factory fuel rails. I have a Racetronix Walbro 255 pump already installed in the tank from my previous set up (EFI Pontiac 455) The help I need is can I run the Walbro pump with the factory regulator as a returnless system, or do I need to change out the pump. I plan to run a factory E38 computer from Speartech if that makes any difference. Depending on the answer, there is question #2 below.
Question two is, can I run the Aeromotive regulator with the factory fuel rails as a return system. It seems that the rails would need to be modified in order to make a return line. I prefer not to run any aftermarket fuel rails on this motor. Power level should be about 620 flywheel HP. Thanks.
Question two is, can I run the Aeromotive regulator with the factory fuel rails as a return system. It seems that the rails would need to be modified in order to make a return line. I prefer not to run any aftermarket fuel rails on this motor. Power level should be about 620 flywheel HP. Thanks.
12-06-2011, 01:34 AM
#2
I am installing an LS7 in my Pontiac and need some help to configure the fuel system. I have the factory LS7 intake, fuel rails, and 42lb LS7 injectors. I would like to retain the factory fuel rails. I have a Racetronix Walbro 255 pump already installed in the tank from my previous set up (EFI Pontiac 455) The help I need is can I run the Walbro pump with the factory regulator as a returnless system, or do I need to change out the pump. I plan to run a factory E38 computer from Speartech if that makes any difference. Depending on the answer, there is question #2 below.
Question two is, can I run the Aeromotive regulator with the factory fuel rails as a return system. It seems that the rails would need to be modified in order to make a return line. I prefer not to run any aftermarket fuel rails on this motor. Power level should be about 620 flywheel HP. Thanks.
Question two is, can I run the Aeromotive regulator with the factory fuel rails as a return system. It seems that the rails would need to be modified in order to make a return line. I prefer not to run any aftermarket fuel rails on this motor. Power level should be about 620 flywheel HP. Thanks.
