Where are pics of the rear underbody diffuser?
Body and interior: rear underbody diffuser, $500

From C&Ds listing of modifcations to cars from the Superfour Challenge:


2003 Vishnu Performance Systems Mitsubishi Lancer Evolution
Vehicle type: front-engine, 4-wheel-drive, 5-passenger, 4-door sedan
Price as tested: $36,923 (base price*: $35,943)
Engine type: turbocharged and intercooled DOHC 16-valve 4-in-line, iron block and aluminum head, ChipTorque/Vishnu XEDE engine-control system with port fuel injection
MODIFICATIONS Engine and transmission: Stage 1 kit (includes engine controller, turbo-back exhaust system, boost controller), $1995; Samco intercooler hose kit, $279; labor, $300; engine total, $2574; Ralliart clutch, transmission total, $1750; TOTAL $4324
Suspension: rear anti-roll bar, $175
Brakes: $110
Wheels and tires: Volk Racing TE37 8.5 x 17-inch forged aluminum wheels, $1772; stock Yokohama Advan A046 P235/45ZR-17 93W tires, no charge; TOTAL $1772
Body and interior: rear underbody diffuser, $500
Displacement 122 cu in, 1997cc
Power (mfr’s claim) 310 bhp @ 6500 rpm
Torque (mfr’s claim) 295 lb-ft @ 2900 rpm
Transmission 5-speed manual
Front brakes stock Brembo 12.7 x 1.3 vented disc; stock Brembo 4-piston caliper
Rear brakes stock Brembo 11.8 x 0.9 vented disc; stock Brembo 2-piston caliper
Brake-pad material, front Ferodo semimetallic
rear semimetallic
Wheelbase 103.3 in
Length 178.5 in
Curb weight 3163 lb
Weight distribution, F/R 61.2/38.8%
*Base price includes all performance-enhancing options.

 

Our AWD Eclipse Spyder has this diffuser... I'll try and get pics

 

Here you go. I scanned a pic of the Vishnu Evo from C/D. I believe those fin-like things are the diffusers.

 

A+ for Effort! Uh thanks! Does anyone have a picture with more focus on the rear underboday paneling?

 

unfortunately, this is the only picture with the angle that shows the rear of Vishnu's evo in C/D. I did a rescan and focused in on the diffusers. hope it helps.

 

Yah, but didn't the C&D site also list the RMR Evo as an imported Evolution VII? And I think the RMR car had stock wheels, but they listed them as 17x9.

They probably don't know what they're talking about.

 

what would those do?

 

No C&D is correct. The RMR car is an EVO VII with EVO VIII body work. It uses 17x9 Enkei RP-02J wheels.

 

Izen: That would explain it then. I rewatched the video after I read that online and saw the Evo 8 wing. So I figured the were smoking crack somehow... but that would've been a pretty tall tale to tell.

 

Thanks, Very nice closeup. Why isn't Shiv explaining this piece on his own car?

I'm eager to see a full underbody paneling kit. Over 60 mph, these bits become very helpful, especially on the track.

 

Because they are not ready for sale yet Currently running two different designs on two cars. They are quite helpful when it comes to high speed aero as they keep the air from backing up under the bumper cover. There are a few other issues involved as well which is why we won't offer it until it is ready.

Cheers,
shiv

 

What wind tunnel are you testing these in... or are you just half-assing it with seat-of-the-pants "feel"?

...







I'm just playin!!!

I look forward to some sort of rear diffuser. I bet that's nice on the highway.

Serious question - can you help the drag coefficient by using something like that or is drag only impacted by the shape of the front part of the car?

I would think the diffuser would help because it would help remove swirling air behind the rear end which would alleviate some of the "hold back" drag caused by that air tumbling and swirling.

 

Hey Shiv,

Are you guys going to develop a front splitter to help downforce at high speeds in the front of the car?

Steve

 

that would be ideal... but it gotta look good too...

 

huhu...wind tunnels are expensive to rent...unless you have a hook up at a NASA facility. I'm betting on the "seat of the pants" method of research on this particular piece. :P