toofast928

Does anyone have specs on fuel volume testing? I want to to test volume of my FP and looking to base line.

Fuel return line removed and placed in a bucket, engine off activate FP. In 30 second time how much fuel is measured in the bucket?

Thanks

jcorenman

For '87+ cars (3.8 bar fuel pressure) the spec is 1250 cc in 30 seconds, minimum. For the 85-86 cars (2.5 bar) it was 1350.

Cheers, Jim

toofast928

Thanks-

granprixweiss928

For 80-83 Models with L-Jettronic and AFM the fuel delivery rate is 1150cc for 30 sec.

Beginning with 84 models 928s the rate is 1350 cc for 30 sec M28.21/22

toofast928

Is the test done with vacuum to the fuel regulator, or no vaccum.

Thanks-

jpitman2

testing flow, not pressure, vacuum shoulnt br relevant.

jp 83 euro s at 57k

mark kibort

we did an S4 yesterday. it ran at about a half a gallon in 30 seconds.

fuel pressure is not relevant due to the OPENING of the fuel rail .. no pressure just flow in this test.