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vwaudiguy
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« Reply #15 on: October 28, 2014, 12:05:14 PM »
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They cheaped out and stuck with a narrow band design, and the wideband code is SYSDEF'd out in all of the 2.7t binaries.
Ok, maybe I misunderstood D's response. I asked which versions of ME he was referring too, and he responded "all of them". I suppose he was referring to just the 2.7T's? Thanks, Nyet. |
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"If you have a chinese turbo, that you are worried is going to blow up when you floor it, then LOL."
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ddillenger
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« Reply #16 on: October 28, 2014, 12:42:53 PM »
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Nope, you understood correctly. You cannot request leaner than 14.7 on any ME7 (that I am aware of, I have been wrong before) without hacks.
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Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience!
Email/Google chat:
DDillenger84(at)gmail(dot)com
Email>PM
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nyet
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« Reply #17 on: October 28, 2014, 01:04:40 PM »
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Nope, you understood correctly. You cannot request leaner than 14.7 on any ME7 (that I am aware of, I have been wrong before) without hacks.
Whoa? Even wideband ME7? I did not know that. |
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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vwaudiguy
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« Reply #18 on: October 28, 2014, 01:57:03 PM »
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Nope, you understood correctly. You cannot request leaner than 14.7 on any ME7 (that I am aware of, I have been wrong before) without hacks.
What about 9 and 17? |
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"If you have a chinese turbo, that you are worried is going to blow up when you floor it, then LOL."
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flaattire
Full Member
Karma: +2/-0
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Posts: 68
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« Reply #19 on: October 28, 2014, 02:41:27 PM »
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Press release for the FSI: "The North American-spec 2.0L FSI Turbo engine should not be confused with the similar European-spec FSI powerplant, which features a third mode of engine operation, stratified charge combustion, to allow short periods of extremely lean burn. In such low-speed, light throttle conditions, the very slight amount of fuel added to the mixture can result in stoichometric ratios as high as 65:1 (the normal ratio for gasoline engines is 14.7:1) and periods of exceptional fuel mileage. Because of North America’s lower fuel quality (which would require special catalysts to handle the extra NOx emissions from our high-sulfur-content gasoline), this technology is not yet available outside of Europe. True stratified combustion will be integrated into this engine, and other VW (and Audi) FSI powerplants, when the high sulfur content of U.S. fuels is decreased in the next several years."
AFAIK they dropped this idea for emissions reasons before / very shortly after release of the AXX.
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vwaudiguy
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« Reply #20 on: October 28, 2014, 02:42:33 PM »
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Press release for the FSI: "The North American-spec 2.0L FSI Turbo engine should not be confused with the similar European-spec FSI powerplant, which features a third mode of engine operation, stratified charge combustion, to allow short periods of extremely lean burn. In such low-speed, light throttle conditions, the very slight amount of fuel added to the mixture can result in stoichometric ratios as high as 65:1 (the normal ratio for gasoline engines is 14.7:1) and periods of exceptional fuel mileage. Because of North America’s lower fuel quality (which would require special catalysts to handle the extra NOx emissions from our high-sulfur-content gasoline), this technology is not yet available outside of Europe. True stratified combustion will be integrated into this engine, and other VW (and Audi) FSI powerplants, when the high sulfur content of U.S. fuels is decreased in the next several years."
AFAIK they dropped this idea for emissions reasons before / very shortly after release of the AXX.
Great info |
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"If you have a chinese turbo, that you are worried is going to blow up when you floor it, then LOL."
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turboat
Moderator
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« Reply #22 on: November 02, 2014, 02:52:46 AM »
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That's very cool! Tfsi conversion next maybe
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flaattire
Full Member
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« Reply #23 on: November 02, 2014, 03:45:12 AM »
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http://www.intechopen.com/download/pdf/43668The paper in the link describes stratified charge combustion under different conditions in a test motor. I wonder what kind of fuel economy you can get with this?
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