156 2.5 v6 fuel rail no return pipe???
I am used to a normal fuel rail with an fuel in from the pump, and a fuel return to the tank and a regulator to balance the fuel spilling back to the tank, therefore maintaining the rail pressure.
However on the 156 2.5 v6 and I guess the v6's on most of the modern Alfas, there is only one pipe and no regulator or return.
I am trying to fit this newer engine to an older car.
Can anyone shed light on this one pipe setup, and how does the system maintain rail pressure as the car accelerates?
Is the pump pumping against a dead stop? or is the pump different from a conventional pump to avoid problems?
Finally, how do you remove an airlock from the rail after reassembly with only one pipe?
There appears to be two sort of fittings on the end of the rails but I have no idea what fits here. The eper picture shows something that it calls a 'glass run' which I have no idea what it is, possibly some sort of sight glass?
The best quote I ever saw after a review of the 164 QV, was "From now on I am only going to buy cars powered by Alfa V6's"
Mmmmmm The noise, the noise...................