Does anyone know what the operating time in milliseconds (m/s) is for whites @ 3 bar and blues @ 3.8 bar
Does anyone know what the operating time in milliseconds (m/s) is for whites @ 3 bar and blues @ 3.8 bar
1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, B5254T ( S60R internals in a 850 block ) ostrich 2.0 , VXR injectors @ 3.8 bar, K24 turbo with a 6+6 compressor wheel, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,
Is this for the DIY remapping bud?
1996 Olive Green 850 AWD - Follow the Project - Forged rods, 19T, big blue injectors, 960 TB, 3.25" MAF, Ostrich, 608 binary, arduino data display, active exhaust control with Focus RS tips, 320mm front brake conversion.
1996 Nautic Blue 850 AWD - Failed its MOT, now it's a donor for the green thing.
2004 Sapphire Black S60 D5 - The new daily hack.
1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, B5254T ( S60R internals in a 850 block ) ostrich 2.0 , VXR injectors @ 3.8 bar, K24 turbo with a 6+6 compressor wheel, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,
So are you after the injector constant for whites and blue then? the duty cycle should be adjusted by the ecu. Or is it the minimum operating time you're after?
1996 Olive Green 850 AWD - Follow the Project - Forged rods, 19T, big blue injectors, 960 TB, 3.25" MAF, Ostrich, 608 binary, arduino data display, active exhaust control with Focus RS tips, 320mm front brake conversion.
1996 Nautic Blue 850 AWD - Failed its MOT, now it's a donor for the green thing.
2004 Sapphire Black S60 D5 - The new daily hack.
1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, B5254T ( S60R internals in a 850 block ) ostrich 2.0 , VXR injectors @ 3.8 bar, K24 turbo with a 6+6 compressor wheel, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,
Think that is adjusted/calculated by the ecu bud. There is a minimum opening time and injector constant (the constant is changed for different injectors), as well as voltage correction table for voltage fluctuations plus some others. You can log the duty cycle though to see if it is at the limit.
The injector constant for whites at 3bar is 0.906
The constant for blues at 3.8bar would be 0.797
1996 Olive Green 850 AWD - Follow the Project - Forged rods, 19T, big blue injectors, 960 TB, 3.25" MAF, Ostrich, 608 binary, arduino data display, active exhaust control with Focus RS tips, 320mm front brake conversion.
1996 Nautic Blue 850 AWD - Failed its MOT, now it's a donor for the green thing.
2004 Sapphire Black S60 D5 - The new daily hack.
Wobbly Dave (Friday 24th January 2014)
I found this on one of my searches
"A four stroke engine takes 2 complete rotations of the crankshaft to complete a cycle. The RPM of the motor is what is going to determine the "time". Let us use the example of an engine running at 600 RPM's. This would give us 300 cycles per minute (600 / 2 = 300). Next we need to convert those converted to cycles per second. Because RPM is a "per minute", we need to divide by 60 (60 seconds in a minute). This would be 300 / 60 = 5. We want this number to represent seconds per cycle (the "time) so we would represent this number as 1/5 (or 200 milliseconds, ms) and equated to the engine cycle taking 200 ms to complete.
Now we need to determine the time the injector is energized at this point in the fuel map. Lets just say for ease of understanding that the injector is pulsed at 20ms. This would be (20 / 200 = 1/10 ) 20 (ms injector is directed to pulse) / 200 (time it took for the engine to complete a cycle) would give you = 1/10 OR a 10% Duty cycle"
1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, B5254T ( S60R internals in a 850 block ) ostrich 2.0 , VXR injectors @ 3.8 bar, K24 turbo with a 6+6 compressor wheel, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,
Think that is for more basic systems. The duty cycle will vary for the amounts of fuel needed, motronic calculates this from the MAF and AFR and injector constant, hence some of the people on the VS thread were running at 110% duty cycle which is imposible for the injectors to achieve, so bigger injectors are needed. Best thing to do is log the duty cycle you are running at and check the maximum it reaches on run.
1996 Olive Green 850 AWD - Follow the Project - Forged rods, 19T, big blue injectors, 960 TB, 3.25" MAF, Ostrich, 608 binary, arduino data display, active exhaust control with Focus RS tips, 320mm front brake conversion.
1996 Nautic Blue 850 AWD - Failed its MOT, now it's a donor for the green thing.
2004 Sapphire Black S60 D5 - The new daily hack.
oblark (Tuesday 7th January 2014),p fandango (Tuesday 7th January 2014)
I`ll more and likely start off with the whites and if more fuel is needed fit the blues @ 3.8 bar
1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, B5254T ( S60R internals in a 850 block ) ostrich 2.0 , VXR injectors @ 3.8 bar, K24 turbo with a 6+6 compressor wheel, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,
Blues at 3 bar flow the same as whites, they are just a slightly different resistance. So you could up the pressure through the whites I guess and change the constant.
Might be better with greens
Last edited by Dangerous Dave; Tuesday 7th January 2014 at 22:01.
1996 Olive Green 850 AWD - Follow the Project - Forged rods, 19T, big blue injectors, 960 TB, 3.25" MAF, Ostrich, 608 binary, arduino data display, active exhaust control with Focus RS tips, 320mm front brake conversion.
1996 Nautic Blue 850 AWD - Failed its MOT, now it's a donor for the green thing.
2004 Sapphire Black S60 D5 - The new daily hack.
Sorry to borrow your thread slightly, but if I were to change my injectors from orange to whites say (I have;>)) Should I need to change the injector constant? I had assumed I might need to thoughit should sort itself out in closed loop mode? Seems to wrok OK and consumption is actially better so haven't worried too much. But how would I do that anyway?
Cheers
Woz
Firstly I'm not sure if Motronic 4.3 (850s) has an injector constant unfortunately (it could be built into the MAF values, etc) as I've not done much with 4.3. There is obviously one in the Motronic 4.4 code.
In a perfect world then yes you would need to change the injector constant (which is set at 1 for the orange/red 315cc injectors), as the base fuelling is set for the oranges, but usually the ecu adapts a little to accommodate the increased fuel amount going in. The whites aren't too much bigger to cause a problem.
You're increased mpg is probably out a little bit as the bigger injectors will be open a shorter time for the same amount of fuel as the smaller injectors. There is a seperate constant for the mpg calculation which probably (very basically) uses the time the injectors are open to calculate the amount of fuel being used, so shorter time equals more mpg, thus bigger injectors equals shorter time open and more mpg, but in reality the actual mpg will not change (or even get worse if the ecu doesn't fully adapt to the increased fuel rate). The amounts might be negligble but without testing we cannot know for sure.
Hope this makes sense.
1996 Olive Green 850 AWD - Follow the Project - Forged rods, 19T, big blue injectors, 960 TB, 3.25" MAF, Ostrich, 608 binary, arduino data display, active exhaust control with Focus RS tips, 320mm front brake conversion.
1996 Nautic Blue 850 AWD - Failed its MOT, now it's a donor for the green thing.
2004 Sapphire Black S60 D5 - The new daily hack.
It would be worth taking a look at your fuel trims and seeing where the long term trim has ended up with the increased fuel flow.
Back to the injector Duty Cycle side of things the normal goal is to be at around 85 - 90% duty cycle max at max load max highest RPM.
Mercedes C320CDI Sport Estate 3 litre V6 7 Gear Auto
Remap 290bhp 628Nm torque @ 1600revs 45.1mpg
artfulflounder (Sunday 26th January 2014),oblark (Sunday 26th January 2014)
Looked up ME7 .....so if blues @3.8bar as mentioned then here are a few examples of the different engines.
In order:
ME7 B5244T3 2002 V70
ME7 B5254T4 2004 AWD V70
ME7 B5234T3 2000 V70
Last edited by 960kg; Sunday 26th January 2014 at 15:20.
Mercedes C320CDI Sport Estate 3 litre V6 7 Gear Auto
Remap 290bhp 628Nm torque @ 1600revs 45.1mpg
artfulflounder (Sunday 26th January 2014),oblark (Sunday 26th January 2014)
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