Aerodynamics of Toyota offered Spoilers

[tooter]

Originally Posted by CrankyOldMan

I would have to put them all into the cosmetic category.

I agree...
Legitimate competition cars go fast enough to make them functional, but most all road vehicles don't... especially the pokey little Yaris.

[xnamerxx]

hatchback spoilers are mainly used for drag reduction rather than downforce. When we were testing the PP cars we removed the giant rear diffuser(not a spoiler but looks similar) to reduce drag on the vehicle and the effect was the venturi's below the car would stall and the car would stop producing downforce.

What you want to do is add a diffuser below the rear wheels and a splitter in front of the front wheels which in turn should create a low pressure zone below the car increasing downforce and reducing aerodynamic drag. Thats why you see lots of diffusers and even mini diffusers on econoboxs and minivans because it can if designed correctly increase fuel economy by reducing drag.

Any car can benefit from reduction in drag and most can benefit from a increase in downforce as long as it reduces lift. Thats why you see lots of the fsae cars with giant wings and diffusers even though they don't reach speeds where there effective.

I've been quite curios about the drag reduction properties of the toyota spoiler as well but I'm willing to bet dollars to doughnuts that they don't do a damn thing and were designed to be tuned out of the airflow.

[fnkngrv]

Originally Posted by tooter

especially the pokey little Yaris.

This perception may be misconceived. Only time will tell. There is nothing pokey about my Yaris

[tooter]

Originally Posted by fnkngrv

This perception may be misconceived. Only time will tell. There is nothing pokey about my Yaris

Your Yaris earned it's wing.