Blown Motor, Engine Rebuild/Replacement.

1slow370

all i'm saying is it's common knowledge in the rest of the fuel injected community that dampers are not necessary in a good fuel system. only utilizing hard line for return flow so that supply pulsations are dampened in the line, bigger rails (rail pulsations are worse when a huge injector is put in a small rail, the standard rail size for aftermarket rails on the z is so small ~.4, compared to the .5 and up most other aftermarket rails are), and utilizing a quality fpr with, a line for each rail, capable of flowing the supply volume to the engine in return flow, is a sure fire way to get consistent fuel delivery. When you start compromising line sizes and routings, using a regulator too small for your pump and supply line, or using too small of a rail diameter, you start getting these issues. I very rarely see race cars with FPD's because rail resonance is greatly effected by rail size, and size/type of supply line and regulator, and most race setups involve -8 or -10 supply and returns, with 5/8 rails, and large high flow regulators. often a small tweak (5-10psi)to base pressure at the regulator can cure it too because the pressure effects the way the fuel moves in the rail.

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