Fulvia mechanical fuel pump fuel pressures

[lancialulu]

Anyone measured the pressure output of a Fispa etc mechanical fuel pump. I know the spec which is c 3psi but is it fairly constant or fluctuating. I put a mechanical guage on the carb feed and saw steady 3psi from the Facet priming pump but wildly fluctuating from the mechanical when the engine was started (electric pump off). It stabalised at 3psi at around 2-2,500 rpm for a while but then went mad around the 3psi mean.

I plan to remove the elctric pump tomorrow and take more readings (and probably buy a red top Facet to use instead).

Tim

This is attempting to find the cause of temporary loss of power on the CER - but thats another story...

[thecolonel]

Red top is sort of  road/race, silver top may be better. I'd also fit a pressure regulator Sytec to a click
adjustable one

http://www.fuelpumpsonline.co.uk/sytec-flo-pro-fuel-pressure-regulator-carburettor-1-5psi-30-p.asp

they also do the fuel pumps

http://www.fuelpumpsonline.co.uk/facet-silver-top-fuel-pump-road-476087e-12-p.asp

Geoff