100% Premium Donating Member Donating Members 641 Member For: 21y 4m 2d Gender: Male Location: If it says ONLINE below, in front of the computer, if not, tearin' up some bitumen! Posted 07/02/04 07:49 AM Share Posted 07/02/04 07:49 AM There seems to be a bit of space under the "T". Is it likely or possible that either Ford or an after market company will build a bigger tank that we could have installed?Geea.I think the whole point that Ford make is that the tank isn't under the car, it's located forward of the rear axle and therefore much safer......I'd get a "drop tank" though if someone offered one.Herrods?? Oh how 80's, YUK :o just get a unichip!My l/100km went from 15.7 to 11.3 after my APS kit was installed, and my range went from a best of 490km full to a current best since mods of 620km! this thing's gonna pay for itself :o Link to comment Share on other sites More sharing options...
Cobra potty trained Lifetime Members 1,938 Member For: 21y 9m 28d Gender: Male Posted 07/02/04 08:13 AM Share Posted 07/02/04 08:13 AM My l/100km went from 15.7 to 11.3 after my APS kit was installed, and my range went from a best of 490km full to a current best since mods of 620km! this thing's gonna pay for itself :o mate ... please sit down ... sorry to break the news mate .... the trip computer is confused and is giving false readings (it is calibrated for the stock pump/delivery)more power - more fuel delivery - less economythe economy is still excellent ... only down 15-20% from stock ... amazing given the massive power gainyour 80L tank should still get you there :lol: Link to comment Share on other sites More sharing options...
Adam Here since the start... Lifetime Members 10,282 Member For: 21y 9m 27d Gender: Male Location: Victoria Posted 08/02/04 10:44 PM Share Posted 08/02/04 10:44 PM My l/100km went from 15.7 to 11.3 after my APS kit was installed, and my range went from a best of 490km full to a current best since mods of 620km! this thing's gonna pay for itself :banghead:mate ... please sit down ... sorry to break the news mate .... the trip computer is confused and is giving false readings (it is calibrated for the stock pump/delivery)more power - more fuel delivery - less economythe economy is still excellent ... only down 15-20% from stock ... amazing given the massive power gainyour 80L tank should still get you there :lol: OK then, so answer this. If the trip computer is calibrated for the original fuel pump why do the reading change at all, wouldn't they just stay as they were before. Link to comment Share on other sites More sharing options...
Lumpen Poison Fish. Poison Fish. TASTY FISH!!! Donating Members 5,181 Member For: 21y 11m 7d Gender: Male Location: The Bogan Shire Posted 09/02/04 12:40 AM Share Posted 09/02/04 12:40 AM Or...couldnt you work it out by dividing distance on tripmeter by fuel put in during fill from bowser? Link to comment Share on other sites More sharing options...
Adam Here since the start... Lifetime Members 10,282 Member For: 21y 9m 27d Gender: Male Location: Victoria Posted 09/02/04 05:48 AM Share Posted 09/02/04 05:48 AM The PCM is where the trip computer gets it information from so I would be suprised if the trip computer was really out whether you had mods or not. The PCM controls how much fuel is delivered to the engine, so I would assume that the PCM has a pretty good idea of how much fuel is also being used by the engine. Link to comment Share on other sites More sharing options...
Turbo6man Lifetime Members 4,084 Member For: 22y 4m 12d Gender: Male Location: South Coast NSW Posted 09/02/04 07:22 AM Share Posted 09/02/04 07:22 AM The PCM controls how much fuel is delivered to the engine, so I would assume that the PCM has a pretty good idea of how much fuel is also being used by the engine. Yes, IF you are using the original size injectors and the original fuel pressure. The pcm measures duty cycle - ie how many millisecs the injector is opened, based on a set injector size and fuel rail pressure. Clearly if the injector is opened for the same time but at a higher pressure there will be more fuel flowing than the pcm is programmed to calculate. Unless the pcm can also measure the fuel pressure and compensate. But if you were to use larger injectors the pcm has no way of knowing or metering this so it's readings will be low. Link to comment Share on other sites More sharing options...
100% Premium Donating Member Donating Members 641 Member For: 21y 4m 2d Gender: Male Location: If it says ONLINE below, in front of the computer, if not, tearin' up some bitumen! Posted 09/02/04 09:01 AM Share Posted 09/02/04 09:01 AM the economy is still excellent ... only down 15-20% from stock ... amazing given the massive power gainyour 80L tank should still get you there :lol: economy DOWN???15.7l per 100km to 11.3l per 100km is economy UP I think! And I'm a little confused????If the pcm doesn't know it's using more fuel, why has the range figure gone to 600km+ from 480km? Link to comment Share on other sites More sharing options...
bcl Toughest BA Turbo Lifetime Members 3,408 Member For: 22y 1m 29d Gender: Male Location: Sydney Posted 09/02/04 09:39 AM Share Posted 09/02/04 09:39 AM Turboman,What you say I have found to be correct.The pcm overstates fuel economy once you change injectors.... the readings look good on the display, but you find out the truth when you fill up.Brian Link to comment Share on other sites More sharing options...
FORDTECH Member 383 Member For: 21y 8m 23d Location: On the edge Posted 09/02/04 10:25 AM Share Posted 09/02/04 10:25 AM Yes, IF you are using the original size injectors and the original fuel pressure. The pcm measures duty cycle - ie how many millisecs the injector is opened, based on a set injector size and fuel rail pressure. Clearly if the injector is opened for the same time but at a higher pressure there will be more fuel flowing than the pcm is programmed to calculate. Unless the pcm can also measure the fuel pressure and compensate. But if you were to use larger injectors the pcm has no way of knowing or metering this so it's readings will be low. The PCM doesnt measure the duty cycle,it controls it.Even if you fit the bigger injectors you still have this thing called a HEGO (Heated Exhaust Gas Oxygen) sensor in the exhaust that tells the PCM whats coming out the other end.The PCM will then adjust the fuel trim to whatever the vehicle inputs are telling it to do. Link to comment Share on other sites More sharing options...
Turbo6man Lifetime Members 4,084 Member For: 22y 4m 12d Gender: Male Location: South Coast NSW Posted 09/02/04 12:00 PM Share Posted 09/02/04 12:00 PM Yes, IF you are using the original size injectors and the original fuel pressure. The pcm measures duty cycle - ie how many millisecs the injector is opened, based on a set injector size and fuel rail pressure. Clearly if the injector is opened for the same time but at a higher pressure there will be more fuel flowing than the pcm is programmed to calculate. Unless the pcm can also measure the fuel pressure and compensate. But if you were to use larger injectors the pcm has no way of knowing or metering this so it's readings will be low.The PCM doesnt measure the duty cycle,it controls it.Even if you fit the bigger injectors you still have this thing called a HEGO (Heated Exhaust Gas Oxygen) sensor in the exhaust that tells the PCM whats coming out the other end.The PCM will then adjust the fuel trim to whatever the vehicle inputs are telling it to do. OK, semantics. You are absolutely correct, but to control the duty cycle the pcm needs to determine first what is required, as you say by hego, for one thing. After the pcm has determined the time for the injector to be opened it then does so and "measures" the time and therefore the amount of fuel that is passed.The point you make is another issue ... it doesn't alter the fact that if you change the injector size then the pcm will send an incorrect signal to the trip meter as to how much fuel is being used. Well, that is my understanding of it anyway and maybe you can clarify this point further for us if I'm wrong ... again Link to comment Share on other sites More sharing options...
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