rolling road fault

[Caramel]

was just thinking surely a rolling road cant be accurate, because you are not getting the cold air like on a road

 

[wide]

they put a really big fan in front of your car to simillate the air when moving fast!!!

 

[Adams_16v]

they do, but its still not the same as your car out on the real road!

 

[Fred@BTM]

not 100% accurate

take your car to 5 different RR's, you'll have 5 different figures (close)

they should only really be used for before and after a moddification to check fueling etc etc