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  #61  
Old 12-06-2010, 01:54 AM
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I'm curious now just how far out my speedometer is so if anyone can tell me how high they're reving at 100kms/hr or 62mpg, that would be awesome.
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  #62  
Old 12-06-2010, 01:54 AM
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some aftermarket navis tell you your speed, see if u can borrow one to check it out. mine is always a few mph off..
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  #63  
Old 12-06-2010, 02:15 AM
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Quote:
Originally Posted by Naz24 View Post
some aftermarket navis tell you your speed, see if u can borrow one to check it out. mine is always a few mph off..
That's what you need. Even with the factory-spec wheel and tyre combinations the speedo reads fast by up to anything like five percent.
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  #64  
Old 12-06-2010, 11:06 AM
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I'll just wait for my radar detector to go off and it'll tell me how fast I'm going. All I have to do now is find a cop pointing a lazer gun at me. lol
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  #65  
Old 12-06-2010, 12:28 PM
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Your speedo reads about 10% slower than your actual speed
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  #66  
Old 12-06-2010, 01:53 PM
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Speaking of speed, hypothetically speaking of course..., would my X5 hit the rev limiter in 5th gear for top speed?
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  #67  
Old 12-06-2010, 01:58 PM
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I have the same truck as you, we're electronically limited to 155mph unless you have the DINAN software which removes the electronic limit. After that yes it is when you reach the "natural limit" of rev limit in 5th.
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  #68  
Old 12-06-2010, 02:05 PM
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any ideas on how fast that is?
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  #69  
Old 12-06-2010, 02:17 PM
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The 4.8iS at 7k rpm in 6th would be going about 213.13 mph
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Last edited by nom3rcy; 12-06-2010 at 02:40 PM.
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  #70  
Old 12-06-2010, 02:36 PM
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For any car, let:

E = Engine RPM
T = transmission gear ratio
F = Final drive ratio
C = Tire circumference (in inches)

( ( ( E x T ) / F ) C )
------------------------ = MPH
1056
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