it tries in some ways... and it has a lot of nice features. it tries to put a low pressure zone in front of the tire and stuff like that with those flaps. it has a nice oil filter panel that comes off. too bad it doesn't attatch to the chassis for firm securing of the bumper and has no lip or other downforce producers.

 

I'm going to try-somehow-to put the zero-lift front lip on the beatrush panel. I haven't sat down and looked at both pieces lately because the wife's sick of having car parts in the house...

 

Voltex dry carbon splitter on Stillways evo.




Voltex Splitter is purely made for the time attack and downforce. Voltex has been testing on Suzuka circuit over and over as well as the wind tunnel at a local university. Voltex is known to japan for its highest hand crafted quality and not no copy mold that is cheaply made. Mr. Nakajima takes his time to perfect each item and that is why it takes so long. This dry carbon Splitter is about an inch and 1/4 thick and is built to stand the downforce. Ive talked to couple of these owners and they tell me their tire rubs on the highway because of the massive downforce. Voltex does make parts for Ings, ASM, Amuse, J's racing, Rundance, Stillway, Trial, and many other aero parts. That alone just tells you all those hardcore racing manufacturer goes to Voltex.

 

here's the evolutionary set up with a largetastic wing

 

Voltex dry carbon splitter on Stillways evo

preserving pics for posterity

 

just a pic of my progress

more here... https://www.evolutionm.net/forums/sh...d.php?t=290745



waiting on the oversized canard setup

 

I like!!! I looked on their website and they dont list that diffuser. Is it a one off or an actual production part?

 

They used to, they don't any more I believe.

As far as the rest of this thread, this is a great thread. Lots of good information.

I too am on a quest for downforce because of the racing I do, high speed open road racing such as the Silver State Classic Challenge and others.

I ran recently at the Pony Express 130 in the 110mph class (average 110mph over 130 miles, with a 124mph maximum speed). All I had was a stock MR with Robispec suspension, 18x9.5 +38 Enkei GTC01 wheels with 275/35R18 Toyo T1Rs, a Beatrush front undertray, a APR GT front lip and a APR GTC-300 rear wing. I HAD a APR rear diffuser to go on but I'm selling it because I'm going to a JDM MR rear bumper + HKS Kansai diffuser combo.

My main problem is front downforce. Everyone who observed my car at the last race said my car was a little tail heavy while driving. It also felt very tail heavy. I thought the Beatrush undertray and APR lip would do something but they really didn't help much at all. I have Voltex C-West front canards on order from J-OnDemand and I'm hoping they will help a little bit but I really doubt the Beatrush tray is getting me where I need to be.

On my STi which I used to race I ran with a Cusco front lip and Cusco undertray. If anyone has seen these they are beautiful pieces and really do the job, because the undertray has a hump in it to create a vacuum. Seen here (forgive the dirt, this was my STi after sitting all winter):



I'm seriously considering reverse engineering the Beatrush tray and redesigning it for not only better downforce but also ease of daily driving use, such as a "hatch" for getting to the oil drain and filter without removing a large chunk of the tray. It wouldn't be hard to engineer something similar to the Cusco undertray using the Beatrush's ease of installation and use.

Just something I'm toying with at the moment. If anyone has ideas for what they would like to see in a aluminum/steel undertray similar to the Beatrush but with functional downforce, let me know

- Patrick

 

you're better off copying the voltex mounting points. i'm not too sure about such a cavity producing good effects. the problem is that you're accelerating air... sure. that's gonna create a low pressure zone... sure. but you're relocating the high pressure zone that is bound to be present.

i guess my main point is that you're not evacuating the air to any place. with the voltex wheel well diffusers you're evacuating the air to the wheel wells. this creates flow and exhaust...

of course first glance also suggests that this is a negative normal lift wing as in the wing shape that is used is the exact negative space that a normal airplane wing would occupy... i guess that's something that should be explored in terms of geometry of downforce

 

JUN makes a universal front undertray with a similar cavity to the Cusco piece. Cusco claims that their parts were designed after extensive wind tunnel testing, and that it was essentially a copy of what they ran on their JGTC Impreza.

It seemed to work well on my STi. I never felt like the downforce was not enough, though I was definitely at a point I needed some front canards on it, which is why I got them for my Evo.

I'd love to run a Voltex kit but it scares me running FRP. My APR lip already has a huge gaping crack in it and I didn't even scrape it on anything

- Patrick

 

So are you still running the stock front bumper? DHP can make a front undertray/splitter combo that will mate up perfectly with the IX front bumper. I had one for my VIII front end and also for my Voltex front.

As far as the durability of the Voltex front bumper, I've been whacking cones at 50mph all summer long with no problems. Even direct hits to the canards did not result in any carnage. The only problem we had was when a mechanic let the car roll forward into his huge Snap-On tool chest. Cracked the fiberglass in the center area of the bumper. We had it fixed and repainted and you can hardly tell there was an issue. With a Urethane bumper like the stocker it would have just flexed and bounced back to shape. . .

EVOlutionary

 

well i meant if you're going to reverse engineer something then do it for the voltex piece, not the beat rush tray.

 

Ah, yeah, gotcha.

- Patrick

 

Yep Vishnu said its out of production. Looking forward to see what CBRD comes up with.

 

some offerings from buschur