NB8B front splitter

ED_MX5 · Postby **ED_MX5** » Tue Aug 30, 2016 11:59 am

GreenMachine
Yeah I had planned on doing a full undertray atm.
Right now it's more experiment for effect. This will only be the first. So class rules aren't too much of a concern for me atm. But yes I had been looking at the rules. I can't go past the outside line of the front bumper for my intended class when I compete.

rascal · Postby **rascal** » Tue Aug 30, 2016 12:07 pm

greenMachine wrote:Don't build them to be indestructible, or mount them with over-strong structures, because that will transmit all of the loads into the car's structure, and risk damage to the car itself in a kerb strike or major gardening incident.

+1
Mine is mounted using 3mm alloy bar stock, and is plenty strong enough to survive the hundreds of times I've banged it OVER kerbs, yet still shears straight off with no damage to car when I bang it INTO kerbs..

ED_MX5 · Postby **ED_MX5** » Tue Aug 30, 2016 12:30 pm

Would using the factory mounts for undertray achieve that well enough?

rascal · Postby **rascal** » Tue Aug 30, 2016 12:47 pm

ED_MX5 wrote:Would using the factory mounts for undertray achieve that well enough?

That's kinda what mine is.
The 3mm alloy bar is bent at both ends into a long squared off 'C' (eg |______| ) and one end bolts to the captive nut up in the frame that the factory undertray bolts to. The other end hangs down to meet the splitter and is bolted through the ply.
I then bolt the rear of the ply splitter to the rear subframe mounts again that the std undertray uses.
The front has u-bolts bolted to the ply and tied to the front baby teeth with cable supports (so has flex <-- important. I orig used solid turnbuckles but kept bending them, Cable fixes this as supports downward forces, but allows some upward movement)

This way its quite solidly mounted, and I can stand and jump on it (and bounce off kerbs) yet when you hit something more substantial, the alloy bar just shears off and the bolts pull through the ply meaning it comes out without damaging/bending any subframe or chassis bits..

Magpie · Postby **Magpie** » Tue Aug 30, 2016 2:08 pm

Likewise mine can take a decent hit from the bottom, but not on the leading edge. It is designed to be pushed backwards so it will fall off its mounts but be able to take downforce and upforce.

Damage

DSCN2954 by Eipeip, on Flickr

IMG_1282[1] by Eipeip, on Flickr

ED_MX5 · Postby **ED_MX5** » Tue Aug 30, 2016 2:34 pm

Got any photos of yours Rascal?
Interested in the ubolts. Trying to picture it but not sure if I have the right idea

rascal · Postby **rascal** » Tue Aug 30, 2016 2:54 pm

ED_MX5 wrote:Got any photos of yours Rascal?
Interested in the ubolts. Trying to picture it but not sure if I have the right idea

Dont have any good pics of the current setup.

This is the first setup a couple of years ago now, using the turnbuckles.

Below is a blurry shot using the cable supports and u-bolts. (and some temporary wheels splats)
u-bolts was probably a bad term. Its the u shaped supports used in ballustrade kits.