EVO X rear diffuser (single exit exhaust)
It completely covers from the rear cross member to the rear bumper (and slightly beyond the bumper), then wraps around and is contoured to the rear bumper. This is different from the Varis one, as it is just cut off after it moulds to the underside of the diffuser. <<< that's how they got the Varis one to stay so flat. The bottom of the rear crossmember and the bottom of the OEM diffuser are close to the same level. It is also molded to the angle which the (GReddy) exhaust is mounted.
The peices I will have to make for the sides are actually very small....approx 16" x 20" for the open side. And 12" x 20" on the exhaust side. These will have to be tapered off at the rear- like the OEM diffuser. I was thinking of moulding the aluminum to flow into the fins, and not cover them up, like on the Varis or JUN models. I'm looking at different ways to do that....
Aerodynamics
As it turns out, a friend of mine who works for an Airplane Resto company (http://www.flyingcolourscorp.com/) says he will take my design to a guy he works with. Apparently his friend has a degree in Aeronautics and can hook me up with a computer simulation of how my design will work. Sweet
My friend's also hooking me up with some 2024 t3 Airplane Grade Aluminum for my next version of this diffuser....that should shave a bit of weight off this puppy (seeing as I used commercial grade 3003 which is much heavier for the current one)
It's about time he paid me back for lending him my power tools and fixing his A6 everytime it breaks down
Evolving Member
Joined: Mar 2004
Posts: 422
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From: Tx,
Hey heyyy. I couldn't agree more
As it turns out, a friend of mine who works for an Airplane Resto company (http://www.flyingcolourscorp.com/) says he will take my design to a guy he works with. Apparently his friend has a degree in Aeronautics and can hook me up with a computer simulation of how my design will work. Sweet
My friend's also hooking me up with some 2024 t3 Airplane Grade Aluminum for my next version of this diffuser....that should shave a bit of weight off this puppy (seeing as I used commercial grade 3003 which is much heavier for the current one)
It's about time he paid me back for lending him my power tools and fixing his A6 everytime it breaks down
As it turns out, a friend of mine who works for an Airplane Resto company (http://www.flyingcolourscorp.com/) says he will take my design to a guy he works with. Apparently his friend has a degree in Aeronautics and can hook me up with a computer simulation of how my design will work. Sweet
My friend's also hooking me up with some 2024 t3 Airplane Grade Aluminum for my next version of this diffuser....that should shave a bit of weight off this puppy (seeing as I used commercial grade 3003 which is much heavier for the current one)
It's about time he paid me back for lending him my power tools and fixing his A6 everytime it breaks down
maybe they can wind tunner it, don't get me wrong, it's better to have a good hard evidence that it will really work it's purpose. good luck.
Newbie
Joined: Jun 2009
Posts: 19
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From: philippines
Hey guys, just wanted to get some opinions/ideas on a rear diffuser I'm making out of aluminum...I figured it's time to cover that gapping hole where the OEM exhaust was...Any suggestions on improving my design would be appreciated. I already have more ideas for my next one...keep in mind, this is NOT the final product.
Diffuser weighs 10 - 12 lbs and has pretty good fitment. Without a doubt it's better than having the parachute hole there and should decrease lift by getting air out from underneath the car at high speeds. I have one or two tweaks to make then I'll mount itand put up more pics. I may keep this one bare metal, but my next one will either be powder coated or clear coated.
To all the owners and fans of the EVO,
Cheers
Diffuser weighs 10 - 12 lbs and has pretty good fitment. Without a doubt it's better than having the parachute hole there and should decrease lift by getting air out from underneath the car at high speeds. I have one or two tweaks to make then I'll mount itand put up more pics. I may keep this one bare metal, but my next one will either be powder coated or clear coated.
To all the owners and fans of the EVO,
Cheers
not a good idea
interesting idea... it looks semi alright, just a little strange seeing it only cover the area where the stock muffler was. Im used to seeing the whole rear covered... are you planing on covering up the whole rear or just staying with the muffler area ?
Eventually everything will be covered as in the pic I posted earlier in the thread...on the Rx7
FYI: That car in the picture is an FD3S RX-7, not a supra...
This design is very similar and I'll eventually be adding to the sides as well. Maybe even put some vortex generators in like the ones on this Supra...I'm not an expert on aerodynamics but I believe the Varis design is a lot more basic then mine...However it looks a lot flatter than mine, which is somthing I will improve in the next version.
Oh, I forgot to mention, the finished product will have custom water jetting done...I just got some things from my guy today and they look absolutely sick! I'm incorporating some Japanese Kanji- which says, "Mitsubishi Evolution Ten" on the outsides of the diffuser wings. Should see some pics within 2-3 wks.
Oh, I forgot to mention, the finished product will have custom water jetting done...I just got some things from my guy today and they look absolutely sick! I'm incorporating some Japanese Kanji- which says, "Mitsubishi Evolution Ten" on the outsides of the diffuser wings. Should see some pics within 2-3 wks.
