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This probally isn't the place for this post because it's going into a chevy, but I have no idea where to look for chevy parts. Anyway's my uncle is building a 67 el-camino and is putting in a 327 with hilborn fuel injection and wants to run an electric fuel pump runnin around 50 psi. Does anyone know who makes an electric pump like this, and where we could get one?

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Almost all EFI pumps will move 50 psi. Its the volume requirement/limitations you have to consider. Most of the walburo pumps are going to enable you to hit 100psi. Aeromotive, Cartech etc......

You will have to run a restrictor and a return system. Ideally with the hilborn stuff, your going to run some type of barrle valve and a bypass system. THey are set up for large volume mechanical pumps (belt or cam driven). To set the thing up for a EFI constant volume pump you would run the barrel valve after the injectors and have it wide open it idle, and closeing at wot. That would apply more pressure/volume to the injectors when you need it. OR use a conventional EFI fuel pressure regulator, and allow it to do the switch from high flow low restriction with a vacume source.

BDS will reconfigure the manifold with actual electronic injectors. That would reduce a lot of headaches. Mechanical fuel injection can be a pita to start, as well as a problem with fuel wash in the cylinders. You need to also consider being able to completly close the fule feed off whenyou shut the engine down. Mechanical injection systems are notorious for siphonong fuel into the manifold, filling cylinders, and diluteing oil.

Some early attempts at streeting Hilborn set ups used N2O fuel solenoids to oopen and close the fuel feed under key on power.
 
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