Rear bumper aero weakness

[oil pan 4]

I second that belly pan idea.

[Frank Lee]

And even belly pans don't help that much.

[aerohead]

Originally Posted by 95CamaroV6

You dont think giving it sharp edges would help much?

The bumper may already be behind the point of separation.If so,it won't really matter what it looks like.The base pressure of the wake is decided at the separation point,so anything behind it doesn't really affect the Cd,unless it sticks way out and actually helps stuff the wake.

[95CamaroV6]

not sure I could do a belly pan myself, but that does make sense

[Sven7]

It's super easy. Buy large sheets of coroplast (corrugated plastic) cut them to size and zip tie them to the holes in your frame. The main idea is to smooth out the turbulent areas such as under the engine bay and below the trunk/spare tire well. Don't exceed a 15* angle from horizontal and you'll be fine. Check my Anal Probe thread in the Ecomodder Central section for some pics, and good luck!

[95CamaroV6]

Originally Posted by Sven7

It's super easy. Buy large sheets of coroplast (corrugated plastic) cut them to size and zip tie them to the holes in your frame. The main idea is to smooth out the turbulent areas such as under the engine bay and below the trunk/spare tire well. Don't exceed a 15* angle from horizontal and you'll be fine. Check my Anal Probe thread in the Ecomodder Central section for some pics, and good luck!

Okay, that sounds much easier than making it from aluminum. A belly pan wouldnt make the engine overheat or the engine melt the belly pan would it? My 6 cyl likes to run warm in the summer months

[drmiller100]

rear bumpers are parachutes in the back of the car. The question is does the parachute
hang low enough to grab air, or is it high enough to be out of the air stream?

trim the bottom 2 or 3 inches off if you are worried.

[Sven7]

Originally Posted by 95CamaroV6

Okay, that sounds much easier than making it from aluminum. A belly pan wouldnt make the engine overheat or the engine melt the belly pan would it? My 6 cyl likes to run warm in the summer months

It should be able to vent hot air into the wheel wells. If it doesn't, cut some vent holes in the pan at the rear of the engine bay.

[Cd]

There was a Hot Rod article * on aerodynamics that had tips on aerodynamics for the same year car as you have. It was suggested that at the track, you could improve your aero by simply stuffing a towel in the gap between the rear spoiler and the trunk.

Though crude, this forces air up and over the spoiler, which has a clean separation line, versus the overly rounded curve of the trunk, which creates a more turbulent wake.

Personally, I would just install a spoiler from a Formula of the same year since it is already sealed.

Like aerohead mentioned, the rear fenders start to curve sharply pretty early.
If you can add a raised trip strip, or trip ramp to snag the air and give it a clean break, you might could improve the aero a bit.

* Having a hard time finding the article since I'm posting this using my phone .

[95CamaroV6]

Thanks everyone for all the input! I have a much better idea of where I'm going with this car now