2013 Cruze full moon wheel covers :D

[jedi_sol]

Originally Posted by Axsle

If the air dam is longer/lower at the sides so that the air is diverted around the tires, is that better? Could that help even with a belly pan?

Yes, if the airdam is longer and lower at the sides, it is better because it diverts air away from the tires AND it will not increase your frontal area.

The reason an air dam can help fuel efficiency is by preventing air from going underneath the car (which is the most un areodynamic part of the car). However, if the airdam is too low, it increases your frontal area, which can hurt fuel efficiency.

Airdams are typically considered the "easiest" way to prevent air from going under the car, therefore, car manufacturers typically skip out on doing a full underbelly tray.

Therefore, there is a fine line between too much air dam and not enough airdam.

[BrandonMods]

Typically how low do you think it would be safe to go without increasing the frontal area? Trial and error?

[jedi_sol]

Originally Posted by BrandonMods

Typically how low do you think it would be safe to go without increasing the frontal area? Trial and error?

Typically the front air dam should extend no lower than the lowest part of your under-body (example, exhause pipes or lower control arms). if you go any lower than the lowest part of your underbody, you are increasing frontal area.

If you want to build an airdam with an underbelly....then make your airdam as low as the lowest part of the underbody....then make your underbelly extend backwards from the bottom of your airdam.

[BrandonMods]

Thanks!

[deejaaa]

looks good.
i think i will drill/tap my aluminum rims, cut sheet aluminum/stainless, attach with 4 flat head screws, leaving access to valves.