Consulta K4M

[sergio_rv]

No hace falta cambiar la bomba para obtener mas presion de combustible, podes averiguar si otro Renault trae el mismo dosador pero mas cojudo o pedes agregar un dosador regulable como los que vende coxx, si lo dejas como esta seguro se queda pobre.
Pero como dijo Oliver solo anas a altas rpm, abajo se va a poner mas chancho.

[Oli_k4m]

As Sergio said ist is not necessary to install another pump, I think it possible to divide the pump unit and install a different regulator or even modifiy it by increasing the spring force (press a little together).

I know somebody who has installed the the F4R-780 throttle without changes to fuel pressure and he found it O.K., but I already made so many other changes to the engine, that I wanted to be on the safe side.
The only thing that can happen as result of these lean peaks, is misfire. Good spark plugs with wider gap but much smaller diameter of the middle-electrode can minimize this risk also, but from performance point of few, fat is allways better...