I've been looking and looking but every one I seem to find has been discontinued or no longer in business.

I saw a couple of the black aluminum ones at Sebring this weekend and they looked great, went under the car half way, and took a lot of abuse.

There are tons of carbon ones out there but seem to be more for looks than functionality other than the Voltex which is mega money and from what i have heard cant take very much abuse.

What are your thoughts and if anyone can steer me in the right direction i would greatly appreciate it

 

When I was looking 10 years ago, I didn't like anything on the market, so I just designed my own and had a local machine shop help fabricate the parts I couldn't and the rest I did myself. I did in 1/8 black powder coated aluminum. I did in 2 stages, the center section in between the exhaust first and then did the matching sides under each rear tire to enclose the rear end a couple years later. Other then one of the 4 center fins that got banged loose form a hit, its been extremely durable for the 8 some years ive been utilizing it.

 

Never seen any data that any of them actually do anything. Then there is that whole vented rear bumper thing.

 

pm S~factor. I'm sure he could fabricate something for you.

 

Well that's part of it of course

I think these are all things that start coming into play when approaching triple digit speeds, along with the front splitter and canards. All of which I employ. Like most, I have no personal data before and after to show me anything (I leave that to the pros) just my own empirical data and overall track times.

 

I think it would definitely help especially when having a single exhaust. Looking at all the space back there and the amount of air the rear bumper has to catch

 

I have no way to determine if this diffuser does anything other than look a bit custom, make differential oil changes take another 10 minutes and pickup small pieces of gravel. Covers the rear central jacking point on the differential too.



-- Chuck

 

For it to be functional you need to flatten the whole underside of the car otherwise it's an ornament

 

Not true at all. You will definitely get more benefit from a full flat bottom but a well designed diffuser only will still help limit rear lift. Most rear wings only cancel out the rear lift generated by the S2000. A diffuser + a rear wing could actually help net positive downforce. Voltex has wind tunnel data to show this.

Don't get me wrong, a flat bottom floor will absolutely make the diffuser more effective, but saying it will do nothing without it is foolish.

 

My diffuser looks similar to the pic above, along with the addition of the outer diffusers that cover the big gaps behind the rear wheels to fully enclose that area, and then of course some sizable venting through the bumper cover for evacuation. Paired with 295's. Yes it looks bad ass inmop, and its functional.