02-19-2014, 12:17 PM | #15 | |
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The PI line only gets used under heavy loads, or higher RPM (basically when the engine needs more fuel)? The DI line is always used (during hard acceleration, and daily driving)? Why use the PI line for the ECA then? I understand that some old fuel can be sitting in the PI line, and that is why you will be using this system that runs both lines for a little while to clean it out. This still doesn't explain why you would have the ECA on the PI line, though. Couldn't you run the ECA on the DI line to get an accurate reading of what the car is ALWAYS currently running on, and then just run both lines like you described to make sure that the PI line is cleaned out and has the same fuel as the DI line? I just ask because it seems counter intuitive to have the ECA on the line that remains inactive for the majority of the tank of fuel that it is supposed to be measuring. It seems like the work-around that you guys came up with to clean out the PI line will help to remedy the left over fuel issue itself and the ECA doesn't really need to be on the PI line. Thanks! Love the look and fit/finish of the kit! Looks very high quality and the price is pretty reasonable. Edit: also... Why use the sport mode button? Would this present any problems for people who actually like to use the sport setting for when they go driving?
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02-19-2014, 12:20 PM | #16 | |
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02-19-2014, 12:31 PM | #17 | |
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The Following User Says Thank You to AZFA20 For This Useful Post: | Xero-Limit (02-19-2014) |
02-19-2014, 12:43 PM | #18 |
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This makes sense. but I still have this thought in the back of my mind:
If you drive the car around like a grandma, or have a long highway trip, the PI will rarely ever get used, so it won't actually be reading any changes that may occur in the content due to mixing. I'm just wondering if this could cause a problem if you have half a tank of 91 and then fill the rest with E85. At first, it may be mostly 91 or mostly E85 depending where the fuel pick-up is. Later, after the fuel has more time to completely mix, it may have a different overall ethanol content. If that change occurs while you're cruising in 6th on the highway after the system already finished flushing the PI line and is inactive, then what? Could you be driving for 50 miles before the PI line gets used so the ECA can update to the more accurate reading of the mixture? Why not run the ECA on the DI line and have it run both PI and DI for 120 seconds on some sort of super-conservative tune until you know the system is flushed out? This way during longer regular driving, the ECA can adjust more frequently.
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02-19-2014, 12:59 PM | #19 | |
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The Following User Says Thank You to jamesm For This Useful Post: | FReSh (02-19-2014) |
02-19-2014, 01:43 PM | #20 |
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This makes more sense. Mike's post made it sound like it rarely used the PI.
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The Following User Says Thank You to FReSh For This Useful Post: | Xero-Limit (02-19-2014) |
02-19-2014, 01:51 PM | #21 |
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The Following User Says Thank You to jamesm For This Useful Post: | Sportsguy83 (02-19-2014) |
02-19-2014, 06:39 PM | #22 |
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Is that the return line where the sensor is installed?
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02-19-2014, 09:45 PM | #24 |
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Our cars dont have a return line. That is the ABS module and its brake fluid lines (unless you mean the fuel line going into the sensor which is the Port Injector line).
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The Following User Says Thank You to Sportsguy83 For This Useful Post: | enjoyminutemaid (02-20-2014) |
02-19-2014, 09:56 PM | #25 | |
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Why the PI line? First off this means the user can look at the gauge and tell when the fuel system is fully flushed through. Since even the "learning mode" biases to DI 65% and PI 35%, this makes sure that when the gauge stops moving, you're 100% ready to get on the throttle and not worry. If you're going from pump to e85 this is very significant, but if you're bouncing from one e85 station to another and it ranges from e70 to e85 it matters very little. The mix from DI/PI will be very close and after a few pulls it will even out in those cases. What we know from doing map switch based ethanol mapping, is that it takes a couple of minutes for the tank to slosh around and the lines to flush with the new fuel. The flex fuel kits help with the precision and feeding the ECU the signal, but it definitely takes a little while for the fuel lines to fully clear of the old fuel. Sport mode button-we can implement this any way you'd like. If you prefer TC off that's fine, or sport mode in just map 1/2/3/4, it is easy to select. I just personally hate sport mode because it cuts off power mid drift and tries to send you into the nearest hard object! That's the NA tune + license + ecutek hardware, but not including the flex fuel kit. |
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The Following User Says Thank You to Xero-Limit For This Useful Post: | FReSh (02-19-2014) |
02-19-2014, 10:08 PM | #26 |
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I hate to be a pain, but I tend to use sport mode when I'm on a road that I'm not too familiar with, and full off for roads that I know. What would be the best way to program it then?
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02-19-2014, 10:15 PM | #27 | |
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We can set it up to work with TC OFF or VSC SPORT or just in a particular map, but what the final tune will have is a 120 sec timeout, so that should not even be necessary. It is just a stop gap until the timeout mapping is bug free. |
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The Following 2 Users Say Thank You to Xero-Limit For This Useful Post: | enjoyminutemaid (02-20-2014), FReSh (02-20-2014) |
02-19-2014, 10:21 PM | #28 |
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Hey I want custom map activation timeouts
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The Following User Says Thank You to jamesm For This Useful Post: | Sportsguy83 (02-19-2014) |
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e85, ethanol, flex fuel |
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