Bosch Fuel Pressure Regulator

[HTElectrical]

John,

I know you covered this before the site crash, but can the return be any of the 3 possible AN fittings?

 

[Rockwood]

Sides are pressurized (injectors should be between these and the pump), bottom is low pressure return to the tank, top is manifold reference (if used).

 

[Blacky2112]

The bottom is the return to the tank and the other two inlets go to each fuel rail, the pressure side from the pump  goes to a tee and feeds  both fuel rails from the other side. This was how C&G and Leading Edge do it but Outfront feeds the pressure to the passenger side fuel rail and then through a crossover line to the other fuel rail and the regulator at the end of the system to the tank.

 

[John@Outfront]

"KISS",  keep it simple stupid

The way we would route this same motor uses 2 less hoses (think $100 wasted)   and looks cleaner  there is zero issue with our setup unless you are approaching over 600 hp

Think of any inline 4 cylinder motor with a single long fuel rail....if it was that important then why doesnt everybody iincluding the manufacture intersect the long fuel rail at the center (between cylinder #2 and #3) ??  well because its not needed.    

Argument: sure the H style of fuel routing makes sense but if you are feeding the entire engine through a -6 line from filter to rails,  then having a -6 line between the rails is good enough.  now if you had a fire breather and was pushing 700+ then the main fuel line should be -8 and the tee off to two -6 to each rail.

but if you like spending money on two more hoses and keep the system looking busy................