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Fuel Pressure?


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Posted

having just fitted a fpr i was ewondering when i was looking at the tickover pressure sitting at 48 psi ' mmm looks ok ' then i thought , hang on i dont even know what the standard pressure shoulkd be anyway. so its got the standard fuel pump on it , so what should the fpr be reading? :Wales-flag:

Posted

AFAIK standard FP is 2,8 Bar static (primed but not running)

2.8 bar is 40.6psi so pressure may be a little high.

Note this may be dofferent for earlier cars that may or may not have been mapped.

Posted (edited)

cheers lewis. think she sits at that when ign is on but not running then it went up to about 45 ish once it was running. but then it also depends on how accurite the gauge is too lol

Edited by scottishtaffy
Posted (edited)

2.8 to 3 bar with engine running and vacuum hose disconnected.

should drop once hose from inlet manifold is back on to about 2.2-2.4 bar

Edited by euan_r
Posted

ahh i did not know that. was told at wallace that mine was running lean above 5k rpm so to put a 255 in to increase flow. i thought it maybe upped pressure too. maybe not. tho i can see what you mean now lewis. the difference being with the 255 will keep it an even flow all the time and the fpr keeps the pressure equall right thru the range

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