Roof spoiler effectiveness

[Turbo Haraune2]

I have a porsche "whale tail" on my car. it works from about 60mph.
Drove it once without the tail and declid, and it felt unstable over 65mph.

Get a big spoiler.

[Eatoniashoprat]

Originally Posted by Turbo Haraune2

Drove it once without the tail and declid, and it felt unstable over 65mph.

Get a big spoiler.

Holy , is your car really light or something? That speeds seems pretty slow compared to many others experiences with hi-perf suspension

[jrinlv]

Rob good info what size holes do you run on the rear of your fenders and how far up do you go? thanks JR

[Turbo Haraune2]

Originally Posted by Eatoniashoprat

Holy , is your car really light or something? That speeds seems pretty slow compared to many others experiences with hi-perf suspension

My car isnt specially light. about 900kg ready to go.
But the whale tail is a big wing and make a big difference to aerodynamics.

and as we all know the beetle isn't very good aerodynamic from original design.