Fuel Return?
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I'm at pretty much the identical power level as you and still don't have a fuel return. Just want to prepare myself for the new motor. Maybe you can explain to me the reasoning behind it?
Originally Posted by dixonk
At what point or power level should you run a fuel return line?
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Ya I need to give Nasty a call. Current setup is 2 Walbro 255's running to the fast fuel rails and a kenne bell boost a pump. Pressure stays at 60PSI consistently at 14 PSI of boost with 18 degrees of timing.
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From: Dallas (Richardson), TX, USA
Originally Posted by dixonk
Pressure stays at 60PSI consistently at 14 PSI of boost with 18 degrees of timing.
Originally Posted by ChevyChad
At 14 psi, your fuel should be at 72psi (58+14). That is why you need a boost referenced FPR. Not sure if they make a FPR that does not have a return on it.
injectors work off of the differential pressure across the injector. As intake manifold pressure increases, the d/p goes down reducing the flow capability of the injector. SO to maximize what you are getting out of your particular injector the fuel pressure should rise at the same rate as the manifold. If you have 14 psi in the manifold and a rail pressure of 55 psi the injector is really only seeing a fuel pressure of 55-14=41psi.