rear spoiler angel

[daytonagary]

new to using a rear spoiler. what is basic rule of thumb for the angle?? Been looking at lots of photos in late model magazine and seen some straight up 90 degrees and some laid back almost 45 degrees. sure it depends on speed of track but basic ideas????

[Jim11h]

Smaller track less grip more angle. Bigger track lay it back early. Air is free speed/traction

[Highwayman]

^^^What he said^^^