Quote:
Originally Posted by Nikitas_Z4mcoupe
Quote:
Originally Posted by gmd2003
Nice !!! To be clear I wasn't implying you were attempting to go downhill but + or - 2% is not perceptible and can make a sig difference . With my different size wheels and tires my speedometer error is huge too ! You have a beautiful car , and it is obviously running fantastic !
Cheers.
George
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No issues mate 
From what I have read from other forums the acceptable percentage when meassuring 100-200km is +/-3%. I dont know if this is correct...... Any ideas? |
To be "verified " it has to be under 3% , but I try to do close to zero , as the effect can be pretty significant so it makes comparing a -2.8 to a zero almost impossible . Depending on the car that much slope can be half a second or more on a heavier car ! The other thing that makes a sig difference is the conditions ,I.e, temp , barometric pressure and of course altitude relative to sea level . I just switched to 3.81 gears from 4.10's so I can probably do 100-200 the 3-4 shift too , but will need to go to fifth still for 60-130 mph . 4-5 on this car is not quick lol.