(Old Asian lady voice)You one smart cookie!

I can see what you mean. The air makes its own high pressure area within the vacant space and if you were to allow some of it to go through it creates more turbulence than if you just left it alone.

 

Right.

If you can manage to shape that airflow through there and do something with it (like a well-designed diffuser coupled with a flat bottom to feed it with) you can do a lot better than just creating a stagnant air pocket. But letting the air make it's own stagnant bubble is often better most other options that aren't carefully designed and tested.

 

The lower tub of my trunk was removed and sealed off with a flat aluminum panel. I guess it would be advantageous to seal off with a flat panel that whole area to be flush with the lower edge of the bumper, or possible remove the lower part of the bumper up to the metal bumper. I'll take a box-cutter to the track with me .

edit: On further thought, the latter option might be like opening the tailgate of a pickup, so won't chance it.

 

I made my own.

I call it a skid plate since I get lots of shit when I tell it creates downforce. I guess you can call it a splitter in a generic sense but my intent is not to restrict air under the front end but to accelerate and drop localized pressure.



the front section converge and then flattens out a quarter and then tapers back up at approx. 4deg to avoid flow seperation with too steep of a gradient. pretty much, it's a generic shape of a typical wing section.


engine cooling becomes an issue so the car is running an oil cooler now.


it sits 4inches off the ground with stock susp.

 

It's not a question of getting air under the car out. You don't want that. When you release air from under the car by cutting holes in the rear bumper you are allowing more air to pass under the car which is the exact opposite of what you want.

I would guess the conception that air is trapped inside the bumper and pressurized looking for a way out is in fact ass backwards thinking. I bet that the space inside the bumper is at a lower pressure than the air on the outside and that the bumper is keeping the outside air out and not the other way around.

 

Not too likely. Air that is moving past the car will have a lower static pressure because it is moving.

 

I made one too. It can support my body weight standing on it.



It goes to the tailpipe I just wish there was enough HP to take advantage of it.

 

parachutes have a hole at the top...


why is it the i see the local civics at the drag strip run consitant times, then remove the rear bumper and run consistantly faster times? cant be just the weight reduction.

why do pick ups get better fuel mileage on the freeway with the tailgate down or off? wouldnt more drag mean worse fuel economy?

obviously, a flat bottom would be a better solution, but it seems to be some misconstued ideas here.

 

Asura, looks nice and strong!

 

[QUOTE=turbo_jimbo,May 5 2006, 12:25 AM] parachutes have a hole at the top...


why is it the i see the local civics at the drag strip run consitant times, then remove the rear bumper and run consistantly faster times?