Under trays

[AR]

Since the car had the new kit fitted, I’ve been meaning to get a front under tray to compliment the R copied bonnet and radiator duct. Same aerodynamic concept as used on the NA2 NSX-R and many other sport cars before and since. As my car has the Route KS ZAZ NSX-R GT front bumper, there are not readily available under trays for it. It was thus that I found myself phoning a metal supplier to locate a 4’ X 8’ sheet of aluminium and reading as much as I could about aerodynamics and how other NSX users had approach the problem.

I made two under trays, one for the front bumper area and one for under the battery area. The front under tray is attached using the OEM 8mm clips system and the M10 bolts. I did not add flaps to the area in front of the front tyres as it has been proven that they can actually cause lift. The under battery area tray is attached with M10 bolts. I also added fins to the sides on the rear tray.

I am happy to report that at motorway speeds the car is sucked to the ground. I plan in the future to add a rear undertray and diffuser.



Partial view of the front under tray

View of one side of the under tray

Battery under tray and fins ( they are straight, is just the angle )

Cheers,

AR

 

[nigel]

If you find a "bead roller" and put at least three, possibly four equally spaced beads the entire length except for two or so cm's at the end of each one it will significently strengthen the panel and in a microscopic way increase the airflow. Make sure you install them with the convex side up. Every little bit helps.

Cheers
nigel

 

[AR]

Cheers Nigel, I have a mate who builds ruck bodies, I will ask if he can lend a hand.

 

[Senninha]

Nice work Ary,

The extra aero will counter the drag from the kit :biggrin: and get you a little closer to me :tongue:

Seriously though I would not install a rear undertray. The first third of the vehicle is the focus to speed and smooth the airflow which is what you've acheived. A rear diffusor will help limit drag and keep the airflows under control. You need the small amount of turbulence from around the fuel tank/engine area to keep the balance of air flows over and under the car.

See you for that coffee soon my friend

regards, Paul

 

[AR]

Nice work Ary,

The extra aero will counter the drag from the kit :biggrin: and get you a little closer to me :tongue:

Seriously though I would not install a rear undertray. The first third of the vehicle is the focus to speed and smooth the airflow which is what you've acheived. A rear diffusor will help limit drag and keep the airflows under control. You need the small amount of turbulence from around the fuel tank/engine area to keep the balance of air flows over and under the car.

See you for that coffee soon my friend

regards, Paul

Thanks Paul, you save me some £££ and time doing the middle bit!

I honestly can't believe the difference it has made specially when going at speed.

Mate let me know when you are in a 80 miles radius and we'll have that coffee!

Cheers,

AR

 

[angus]

WOW , we may have to trade work / parts!

 

[AR]

Angus thanks for the kind words, as soon as I get my pennies together I will be giving you a call. It would have been sooner but our tax bill was massive. I could have bought a few turbos for that and it was pay by January 31st.

 

[GreyHoundSteve]

Good work and i'm surprised more people don't do this. With he price of the nsx r ones and all the custom bumpers running around i would think more people would undertake a project like this. I know that once i settle on a front and rear bumper i will be making my own under trays as well.

 

[MvM]

Nice work !!

Seems that more and more people are paying attention to what's going on under the car and how it might affect the handling.

You might want to check this thread. So far it it the most comprehensive and detailed underbody cover that I have EVER seen on a NSX.

http://www.nsxprime.com/forums/showthread.php?t=116208