great thank you
do you use standard pump?
does fuel line supply both fuel runners or seperate one for each runner
yes for now i use original fuel pump made for 316

it works but it has pulsation of fuel pressure when extrainjectors start to open and that's no good , soon i will change it with a bigger one just like on my 328 turbo i will send a pictures .
the fuel line is separated with T fitting after fuel filter and than suplyes both fuel reils after that again T fitting and one hose goes to exturnal fuel pressure regulator.
if you use second fuel reil with the same fuel pressure ragulator just like original 3 bar you can use both regulators and don't need exturnal like mine just use T fitting to separate fuel to supply both reils and after again T fitting to kombine backfuel to one hose. You can use also little T fitting for vakuum tube for both fuel pressure regulators , i made that mode to my 328 turbo with two original fuel regulators and two fuel reils it works fine.