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Saab 9-3 Sport Saloon / Convertible / Combi (Wagon/Estate) / Turbo X / AWD (2003 on) / Re: 93 V6 fuel pressure release.
« on: 06 May 2024, 06:34:48 PM »
Moving to SI usints is usually a recipe for confusion so I'll speak automotive 
The test protocol in WIS talks about using Tech II to activate different modes, with a low of 1.9 bar, then in ranges typically from 2.3-2.6 bar all the way up to 2.9-4.9 bar
Thinking about the B2x5 engines they operate at 3 bar, without adjustment for boost, so it is reasonable to expect that the later cars should be capable of a flow at least equivalent to thar derived for the 3 bar pressure, though perhaps less because there is, as you said, no fuel return. 2 litres / minute flow is also a handy test value for cars of this sort of power.
If you don't have the test gear (and why should you), then perhaps you can run a flow test, which may also illustrate a restriction in the pipe ?
As you suggest, 2 bar pressure does seem low, can you perhaps use Tech II to do an internal measure on the different operating modes ?
The test protocol in WIS talks about using Tech II to activate different modes, with a low of 1.9 bar, then in ranges typically from 2.3-2.6 bar all the way up to 2.9-4.9 bar
Thinking about the B2x5 engines they operate at 3 bar, without adjustment for boost, so it is reasonable to expect that the later cars should be capable of a flow at least equivalent to thar derived for the 3 bar pressure, though perhaps less because there is, as you said, no fuel return. 2 litres / minute flow is also a handy test value for cars of this sort of power.
If you don't have the test gear (and why should you), then perhaps you can run a flow test, which may also illustrate a restriction in the pipe ?
As you suggest, 2 bar pressure does seem low, can you perhaps use Tech II to do an internal measure on the different operating modes ?
