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#2
12-28-2015, 12:22 PM
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Quote:
If so, the low end should be fine.
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2008 4.8i Black with Tabacco. Black Y-spoke wheels and shadowline trim. 
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#3
12-28-2015, 11:22 PM
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I monitor mine, usually sits at 13.5, but occasionally 13.3-13.5... That's with my cruise set @ about 85...
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Current- --2003 X5 4.6 Estoril Blue Black Nappa leather rear air bags OEM nav OEM hitch OEM cargo liner Black housing SPYDER headlights - Evo-XR projectors 2017 GMC Sierra, 7K miles... 2017 GMC Sierra, 60K miles... 2015 GMC Sierra 280K miles... 2011 GMC Sierra, 500K miles... Previous wheels: --First love~ 1969 Chevy C10, 396BB bored, 3 on the tree, Black ~SOLD~ --2011 Chevy Silverado LT 2500HD CCSB, Black, 250K miles ~SOLD~
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#5
12-29-2015, 03:38 AM
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From a quick 10 mile round trip tonight, mine fluctuated between 13.2-13.9 but stayed mostly right around 13.8
(via OBC)
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____ 2005 X5 4.8is ____  Previous : 1998 M3, 1999 328is, 1996 328i, 1994 325i convertible, 1999 528i, 1998 740i, 1999 740iL
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#6
12-29-2015, 10:34 AM
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I would mark that down as NORMAL. The demand from the electrical system and the Alt out put as the engine slows down and speeds up will account for the fluctuation. As long as it stays above 13.0 and below 15.0 Volts you are golden. Now that you are looking at it all the time you will see the drops when the demand is high (A/C on, Blower on high, wipers on, headlamps on, fogs on, etc, etc) and then you come to a light....
Most Alts will put out enough AMPS to hold the voltage in the 13.xx range. The V8's have the larger AMP output Alternators so you should be OK. As the Alt slowly dies, the total output will fluctuate as the brushes wear out and build up carbon tracking. You can test an alternator's total Volt/AMP capability with a Carbon Pile Starting/Charging tester with just a few clamp test leads hooked up. Most shops have one like this.....
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 2005 X5 4.8IS The Blue ones are always FASTER.... Current Garage: 2005 X5 4.8is 2002 M5 TiSilver 2003 525iT 1998 528i Former Garage Stable Highlights 2004 325XiT Sport 1973 De Tomaso Pantera, L Model 1970 Dodge Challenger T/A 4 sp Alpine White 1970 Dodge Challenger T/A 4 sp GoManGo Green 1971 Dart Sport, “Dart Light” package 1969 Road Runner 383 1968 Ply Barracuda 340S FB Sea-foam Green
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