Abnormal

I have made my own rear wind diffuser out of .040" Aluminum. I not too happy with the way it looks, I'll probably make another one. Please give me any and all opinions. Constructive criticism is accepted. Any ideas to make it better would be greatly appreicated. This is my first one and I have no experience with aerodynamics. I'm not finished with this one yet, I still have to finish the sides. This is my first time posting pics so I hope they uploaded for viewing.

9krpmrx8

iTrader: (46)

I can dig it, can the factory exhaust shrouds still attach? Any pics from the bottom?

Abnormal

Factory exhaust shrouds will never go on again. It's all been cut smooth. I'm adding aluminum tunnels to the sides. I'll take pictures of the bottom and post. This pic is about halfway through the project but it might give you a good idea with the bottom. I would like to change how I did the bottom towards the front with the airflow design on my next piece.

Abnormal

I forgot to mention that I have center exhaust, it's not on the car in the pics.

9krpmrx8

iTrader: (46)

Ah okay. Cool, I look forward to seeing your progress. How are you securing it?

Abnormal

I had to move the rear impact bar up 2" to clear better. On the rear differential frame structure there are two holes in the center evenly spaced apart just above the exhaust pipe. I made brackets and mounted it to those holes. The back part is screwed to the rear impact bar. On the exhaust I have two Magnaflow universal mufflers. One is right after the exhaust flange after the resonator/catalytic convertor: whatever that last one is. The other muffler is a single in and dual out straight out the back.

Rotary-RX8

iTrader: (1)

check out sifu ... he has a custom rear diff and his looks sickk !!

FastFreddy61

From what I can see, this will actually lift the rear at speed. Not wanting to rain on your parade, but it looks ****.

Arca_ex

iTrader: (10)

That one won't be functional, the angle of the diffuser is far too high for it to be effective and the two vertical fins that are angled out will cause some weird horizontal activity in the air coming out from under the car. Definitely looks cool though if that's what you were going for.

Optimum angle is 7 to 10 degrees from horizontal, and functional diffusers are usually almost flat.

It looks good for a trial run, I'm actually getting ready to build a rear diffuser but it's going to be purely for aero purposes.



Also I'm totally jealous of your lift