That picture brings back memories - I had a Firebird that looked near exactly like that in high school. Was one of the first cars I bought.
|Originally posted by Macarchie:|
If you're concerned about drag issues under the car, the turbulence generated by the cradle and trunk well will override any benefit from a diffuser. For the Fiero, the nearly vertical rear window will create a flow separation point which will tumble the air long before it gets behind the bumper. My advice would be to spend the money on upgrades that will actually help performance or appearance.
Yeah I have to agree with this.
The Fiero's rear trunk was designed to accommodate placing one of the normal size wheel and tire into it in case of a flat in case of emergency, since you cannot place the normal size wheel and tire in the spare's location. The trunk had to be designed to be rather large. Because of it's large size, any air going to the trunk would be blocked or forced to the sides of the car. However, not that much air gets back there anyway. It's primarily due to the car's design. Air traveling under the car doesn't work like a normal uni-body vehicle. When air traveling underneath the Fiero's space frame meets the opening where the drivetrain is, the air gets forced upwards and through the vents of the decklid. This air going through the decklid eventually meets the air coming over the car. There's a bit of a neutral pocket around the window area, but there is a meeting point between the air going over the car and the air coming from under it.
If you have looked at other similar mid-ship vehicles that are well established, like the MR2 and Lotus cars, you'll notice that rear aero is not focused on much. It's probably because these vehicles experience similar phenomena as the Fiero does. Some thought could have been placed into more intricate rear aero for air flow, such as is on many mid-ship exotic cars, but if that would have been the case there would have potentially been little to no room for a rear trunk, thus destroying most all the Fiero's cargo capacity.