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poor performance on 545i

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Old 07-06-2008, 07:53 AM
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Well I finally went out and bought a performance meter for the car to get some baseline numbers. The first thing I did was calculate the 0-60 times, and now I quite disappointed with the results of 7.56, 8.0, and 7.72. I would do more testing but why rub a wound with salt. I performed the tests with DSC inactivated, and noticed the engine hesitated at first when accelerating. I think if I could get rid of this hesitation I would have much better results. I'm currently at over 6000ft above sea level and the car has a k&n filter. I was thinking of taking the car back to the dealer to, since it's CPO'ed, to see if they could fix the problem or is this a known problem with a quick fix? Any help would be appreciated.
Old 07-06-2008, 08:36 AM
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Something doesn't sound right there. You should easily being doing 6 to 6.5 sec. and once you got it down you should be in the mid 5's pretty much all the time. Sure your performance meter is working right???
Old 07-06-2008, 09:13 AM
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What about a Sprint Booster? Seems alot of people have them and say they eliminate to lag between pressing the accelerator and the car actually responding.
Old 07-06-2008, 10:25 AM
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Originally Posted by skylolow' post='617426' date='Jul 6 2008, 10:36 AM
Something doesn't sound right there. You should easily being doing 6 to 6.5 sec. and once you got it down you should be in the mid 5's pretty much all the time. Sure your performance meter is working right???
The meter seems to be working correctly. It the one passport makes, and you simply push one button once stopped and then go. I think the additional time is due to the lag. I just do not know why it is lagging, and hope that someone can help. I could and have thought about upgrading but would want to find out what is currently wrong before then.
Old 07-06-2008, 11:00 AM
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Slower than a 530i: check your car!
Old 07-06-2008, 04:33 PM
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Check your Spark plugs, Oxygen sensors, Exhaust Valve if you have it on stock, Gas above of 91 octane.

Maybe check your chronometer... bring another clock with chronometer mode in your hand while you test and compare the time.

Post again after your checks.


Good luck!
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