01-03-2012, 10:47 AM | #23 | |
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01-03-2012, 11:20 AM | #24 | |
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Donno. From my limited experience there is a significant dead spot in the throttle tip in that I mistakenly thought was turbo lag.
I think this device would eliminate or minimize the 5-10% throttle application where the stock throttle mapping gives the engine 0% power. Here is a blurb from the website: Quote:
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01-03-2012, 12:34 PM | #25 | |
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01-04-2012, 02:19 PM | #26 | |
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It looks like the Sprintbooster is not available for the 2nd gen X3 at this time
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01-04-2012, 07:17 PM | #27 |
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thanks for that explanation, lotus7. i'm curious what you think of using auto-h, then? do you leave it set that way? or do you, yourself, just rely on an educated foot?
further, would routine use of auto-h cause accelerated brake wear? |
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01-24-2012, 03:01 PM | #29 |
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Just a quick update on the lag. Had the X3 at the dealer couple days back for routine oil change and also asked them to look at the lag.
Their answer, exactly what I was expecting, was 'working within normal design specs'. That statement is hard for me to argue as it's throwing no codes, no shadow codes, nothing and from their perspective they are right. Tech also mentioned things like turbo lag, the eagerness of the Zf8spd to up shift etc. However, I do not think any of the scenarios fit our issue. I was really hoping for some software patch but it is what it is. Interestingly enough, drove a '12 528 xdrive with the N20 motor and the same 8spd and it was much smoother but at the end of the day I'd still take a 3 series platform over the 5 series. Even our X3 feels much tighter and more agile than the 528 did. |
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01-26-2012, 10:34 PM | #30 |
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My throttle take-off lag has just gotten worse and more finicky on my 35i even though I'm very aware of it and have adjusted for smooth take-offs. If I want to take off extremely slowly for the best gas mileage, I'm OK. But it I want a moderately fast take off, I find it difficult with the tranny in normal mode. I use Auto-H quite often as I drive surface streets quite freqently, or sometimes sport mode for moderate take-off and then switch back to normal mode once I'm going. Now, my complaint is that Auto-H doesn't stay on when you turn the car off. I now have a routine of starting the car, disengaging the parking brake, and then turn on Auto-H right away. I'm bummed that Auto-H can't be programed to stay on when the car is turned off.
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01-27-2012, 11:01 AM | #31 |
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01-27-2012, 11:52 AM | #32 | |
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I have other cars that keep the radio on until you pull the door handle to get out - a better solution IMO. |
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01-27-2012, 09:27 PM | #33 |
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I like that the stereo keeps playing when I get out, open odors, and unload the car. Baffles me why people care if the power stays active for a few minutes. What's the harm? You don't have to push the stop button twice, only once.
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03-30-2012, 04:36 PM | #34 |
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Had our X3 35i at dealer to install hitch and mentioned about the throttle lag/jumpy throttle. The performed a TSB on it to reprogram the throttle. It is much improved with a more linear response now. I highly recommend getting it done. The info on my paperwork says SIB 24 02 12, DME EGS Software Calibration.
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03-30-2012, 06:30 PM | #36 |
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Took delivery of our first 2012 in the middle of December. Definitely had throttle lag/feel issues. Just picked up our second 2012 last week (to replace the yellow one) and the throttle response is perfect. If my experience is any indication, seems that BMW has addressed the issue in just the last three months.
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03-30-2012, 08:48 PM | #37 | |
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That is a relief as it was the only issue on the car I expected to hate. My delivery is scheduled for end of April so I hope my car has the updated throttle mapping.
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03-30-2012, 08:57 PM | #38 |
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I took delivery of mine in early Feb (January Build) and it has the throttle problem. So...maybe just within the last 6 weeks?
My question is...if they know how to fix it...why not tell me (and everyone) about it? |
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03-31-2012, 11:06 AM | #41 |
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03-31-2012, 02:44 PM | #42 |
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03-31-2012, 05:48 PM | #43 |
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Apparently the throttle is programmed to promote fuel economy in normal mode. If you're concerned about turning into traffic you can just toggle into Sport mode (and back of you like) which is even easier than shifting gears with a MT. The Sport throttle response is very nimble and capable of pulling some G's from a dead stop.
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04-01-2012, 06:52 PM | #44 | |
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