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#1
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Exhaust "pop" at redline shift.... normal?
With the nicer weather upon us, we've (OK, I'Ve) had a chance to get on it a little, with some fun 100-240kph runs (on a closed track, naturally..... ). I'm noticing that when I'm on full throttle, and it's shifting at redline, just as it shifts, I am hearing this little "pop", or "puff", from the exhaust. This happens when I am in "non-M" mode (M button not engaged), and with M button pressed. I actually think it sounds MEAN, and kinda like it, but just wondering if anyone else is getting it. BTW - this thing is crazy fast for something that weighs this much!!! Love it. thanks everyone.
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2009 Lamborghini Gallardo LP560-4 (2006 Z4 M Roadster - Mary's ) (2012 X6///M ) |
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#2
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sounds like a nice bit of turbocharger wastegate overrun to me. But I'll let the others chip in! Good to see you're letting the beast off the leash!
<EDIT> interestingly I then went and looked it up on wikipedia and found this Wastegate - Wikipedia, the free encyclopedia
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StumpyPete Current: gone over to the dark side of Ingolstadt due to BMW unreliabilty Previous: Xena III E70 3.0si, Space Gray Previous: Xena II E53 3.0i SE, Manual, Toledo Blue Previous Previous: Xena E53 3.0i SE, Manual, Topaz Blue Last edited by StumpyPete; 03-26-2010 at 04:50 PM. |
#3
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Quote:
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__________________________________________ Porsche 997 Turbo Porsche Cayenne GTS /// BMW X5 M |
#4
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Yup, totally normal. I hear it at almost every shift. :-p
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2022 X5M Comp Dravit Grey/Full Silverstone Previous: 2018 M5 Black/Full Silverstone 2015 X5M Donington Grey/Full Silverstone 2010 X5M Space Grey/Full Silverstone 2003 4.6is Silver/Black |
#5
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blow offs on the wastegate
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2001 X5 4.4i WHITE-Loaded like a baby's diaper SOLD |
#6
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Thanks for the comments, everyone.
Good to know. And yes, I am lovin' it
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2009 Lamborghini Gallardo LP560-4 (2006 Z4 M Roadster - Mary's ) (2012 X6///M ) |
#7
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Why would the wastegates change with a shift (on the exhaust side of the turbo)? Wouldn't it more likely be a pressure wave on the compressor side?
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2007 X3 3.0si, 6 MT, Premium, White Retired: 2008 535i, 6 MT, M Sport, Premium, Space Grey 2003 X5 3.0 Steptronic, Premium, Titanium Silver 2002 325xi 5 MT, Steel Grey 2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue |
#8
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yep I hear this quite a bit under heavier acceleration when changing gear at higher rpm
love it |
#9
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The Burp.
Love the truck! K
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#10
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No idea what it is but I hear it. Also, nothing better than that great sound when you let off the throttle at higher RPM with M on. Just terrific.
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