NSX Splitter Designs

stuntman · 29 December 2013

Splitting off of my other thread about an NSX "Hybrid" rear wing design: http://www.nsxprime.com/forum/showt...k-vs-NSX-R-wing-vs-GT-Wing-vs-Hybrid-On-track

This thread is for discussion of NSX Splitter designs. Post your own splitter designs, ideas, thoughts, etc...

Ive personally always liked the looks of "side splitters". There's a company who makes some pretty nice splitters and side splitters for S2000s out of Carbon Fiber (which I am also a sucker for). Due to the flat frame rails, mounting one of these side splitters would be really easy on an NSX. Does anyone else share my interest or would like a set? *These probably wont do anything that you can subjectively feel, while NSX-R wings and front splitters would make an objective difference on a stop watch.

Side Splitter:

They also make a lot of very nice quality and STRONG front splitters.

S2000 Front Splitter:

Strength Demo of front splitter:

Front Splitter Mounting (all behind front bumper)

Corvette Splitter (look how far it protrudes with no support struts):

Core design:

**This is the splitter design with incorporated front diffusers that I want for the NSX:

Ponyboy · 29 December 2013

IMHO, an effective and affordable splitter that is easily replaceable is something that the NSX community is in sore need of.

I'd definitely be interested.

stuntman · 29 December 2013

The flat splitter like on the Corvette and S2000 above would be ~$650 with brackets while the front splitter with integrated diffusers would be around $1,000.

illwillem · 29 December 2013

I'll be extremely curious too see how they figure out mounting. There is nothing substantial to connect too forward of the rad support so and even a 4 inch protrusion is around 20+ some inches from any mounting point, to make matters worse the positioning of the OEM air ducting blocks almost all the places where you could use turnbuckles as support. You could use the OEM steel bumper but youd need to cut the foam and tap it for provisions. I have see those Wasp splitters at a lot of events around, really good finish and the mounting looks sorted on the s2k so im sure they are capable of coming up with something. It took me quite a bit of time to come up with something that frame mounted that I felt was secure enough to take on the track. I'm following this closely.

as you can see, you really need to gut things to get it to all fit correctly
<a href="http://smg.photobucket.com/user/xburnitallx/media/20130428_185953_zps0e9f1461.jpg.html" target="_blank"><img src="http://img.photobucket.com/albums/v680/xburnitallx/20130428_185953_zps0e9f1461.jpg" border="0" alt=" photo 20130428_185953_zps0e9f1461.jpg"/></a>

NSXcitement · 29 December 2013

I don't know anything about splitters. Is there a min/max distance from the ground in order for them to be effective? Would the installation require any cutting/drilling, removal of fender liners, etc.?

scammy · 29 December 2013

Billy i am in for the full front splitter/diffuser option, while i dont have a BAW i do have the 'R' wing and would rather go back to stock OEM wing and just change it over to the big wing for track duty same for the splitter

stuntman · 29 December 2013

NSXcitement said:
I don't know anything about splitters. Is there a min/max distance from the ground in order for them to be effective? Would the installation require any cutting/drilling, removal of fender liners, etc.?

The closer to the ground and the longer the better, but 4-5" above the ground still makes a noticeable difference.

scammy said:
Billy i am in for the full front splitter/diffuser option, while i dont have a BAW i do have the 'R' wing and would rather go back to stock OEM wing and just change it over to the big wing for track duty same for the splitter

The goal would be for it to unbolt with minimal effort - just jacking it up.

hondoctors · 29 December 2013

I'm interested to Billy. I have a DF 02+ front end now, and a DF lip. Would the splitter also fit my car?

scammy · 29 December 2013

The goal would be for it to unbolt with minimal effort - just jacking it up.[/QUOTE]

mate would bolt straight up to the bumper or would you still need the sacrificial lip?

stuntman · 30 December 2013

The splitter will sit below the stock sacrificial lip and could be unbolted so the sacrificial lip would once again be the lowest part of the car to not affect street ability.

Nukem · 30 December 2013

With side splitters, I always liked the way they looked, but do they do anything for the car? Wouldn't you need a flat underbody instead?

mochanges · 30 December 2013

Definitely want the side splitters. I have seen the Downforce ones and they seem to vary in quality from one set to another, plus they are hard to actually get ahold of. Front splitter is interesting as well, some sort of quick release would be great as I scrape the stock one pretty bad right now.

ProOnThaSnow · 30 December 2013

I'll be saving my pennies in hopes you have some of these produced. I'd love to have a set of the side plitters in conjunction with a front splitter.

One question though, would the front splitter just be flat as well? I woud like to put a Shine GT front lip on my car in conjunction with a splitter similar to what you're describing. As far as brackets and mounting points under the vehicle, I would be more than willing to modify those included, or come up with my own to mount it so proper fit could be achieved.

whrdnsx · 30 December 2013

Ponyboy said:
IMHO, an effective and affordable splitter that is easily replaceable is something that the NSX community is in sore need of.

I'd definitely be interested.

I'm interested too, the version with diffusers.

Jeff@Carbon6 · 30 December 2013

This was my design for the Sorcery front end. The center opening on the underside goes back about 8" then goes up to create a slight vacuum. I spent some time calculating the advantage of that to a flat splitter. I really didn't "feel" much of a difference.

ALwAyS4SaLe · 31 December 2013

So are you saying you already produced one for your car? If so, that is one amazing piece of work. You are definitely the king of Fabrications. Any interests in a reproduction? I understand that you like to keep one-off parts for yourself. Any chance in remaking a less aggressive front diffuser say for an OEM from end etc...

Jeff@Carbon6 said:
This was my design for the Sorcery front end. The center opening on the underside goes back about 8" then goes up to create a slight vacuum. I spent some time calculating the advantage of that to a flat splitter. I really didn't "feel" much of a difference.

stuntman · 31 December 2013

Nukem said:
With side splitters, I always liked the way they looked, but do they do anything for the car? Wouldn't you need a flat underbody instead?

Theoretically they prevent air from wrapping under the car which should reduce lift. Since they don't really affect the balance (splitter gives you front, wing gives you rear downforce) it's harder to tell their effect, which would be minimal compared to a wing or splitter. For me, I really like the look, they should be somewhat functional but even if they don't lower my lap time 0.1 seconds, I like the functional style of them and think it'll compliment the 02 skirts nicely.

Jeff@Carbon6 said:
This was my design for the Sorcery front end. The center opening on the underside goes back about 8" then goes up to create a slight vacuum. I spent some time calculating the advantage of that to a flat splitter. I really didn't "feel" much of a difference.

You make some quality products.

Any more pics of the front bumper or the diffuser design in that splitter? How did you calculate the difference? Like a rear diffuser, a proper front can be very effective if optimized properly -which isn't always easy to do.

9doors · 31 December 2013

Definitely want one of these. Couple of questions...very interested in the mounting ideas, since as Wil notes...not a lot of mounting options for us. Also would your proposed design(s) replace a front undertray, or would they simply mount below that? Definitely need something that is a quick on-and-off at the track.

stuntman · 31 December 2013

I'm thinking slots will have to be cut into the stock undertray for it to be designed as an easily removable track piece. Or just left in place for some.

9doors · 31 December 2013

Sorry if there's any confusion. My question would be in relation to a flat, full coverage aftermarket front undertray, not the stock battery tray per say.

stuntman · 31 December 2013

The metal braces for the battery tray would be left alone. The stock plastic (not perfectly flat) underttay would probably require some cutting for the splitter bracket to mount to the chassis. So the flat-bottom (or diffused) carbon splitter could be taken on and off and when removed, would essentially be stock.

9doors · 31 December 2013

Ok, so that sounds like it will just be a compliment to a full flat undertray, and we'll just have to cut that a bit for the splitter bracket mounts. That works just fine.

stuntman · 31 December 2013

You have a flat undertray?

Jeff@Carbon6 · 31 December 2013

My partner at my shop is an engineer for a military company. His specialty is fluid dynamics. We did a few simple calculation in some cfd software based on just the footprint of the car. I don't remember the exact specifics but it was designed to negate any pressure caused by incoming air that would produce lift. Here is an image of the profile on that underside.

I am by no means the best judgement of handling (my track driving is fair at best) but from the basic feel of the car it feels a lot more stable and planted sense I have completely sealed up the underside. Both at speed and hard breaking. I remember when I was first doing the widebody conversion on the car before any of the under body was done and it had the stock Sorcery style flat splitter on the front, The handling, especially at speed, was poor. It felt like the wind resistance was moving the car all over. I know a lot of other things come into play with that too. Sense I have mapped all the air ducting and fender liners, the car is much more fun to drive.

The rear was calculated in a similar way as the front. I really want to revisit that at some point to refine them together. I'm sure it can be improved.
Here is the rear profile:

01a4man · 31 December 2013

Jeff@Carbon6 said:
My partner at my shop is an engineer for a military company. His specialty is fluid dynamics. We did a few simple calculation in some cfd software based on just the footprint of the car. I don't remember the exact specifics but it was designed to negate any pressure caused by incoming air that would produce lift. Here is an image of the profile on that underside.

I am by no means the best judgement of handling (my track driving is fair at best) but from the basic feel of the car it feels a lot more stable and planted sense I have completely sealed up the underside. Both at speed and hard breaking. I remember when I was first doing the widebody conversion on the car before any of the under body was done and it had the stock Sorcery style flat splitter on the front, The handling, especially at speed, was poor. It felt like the wind resistance was moving the car all over. I know a lot of other things come into play with that too. Sense I have mapped all the air ducting and fender liners, the car is much more fun to drive.

The rear was calculated in a similar way as the front. I really want to revisit that at some point to refine them together. I'm sure it can be improved.
Here is the rear profile:

Jeff,

Could you do one for a Madonna Kit? I'd be interested for sure!

NSX Splitter Designs

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