333pg333

Is an inside net a necessity? Or should I say, is it something I should definitely get?

Charles A. Toupin

No, unless the sanctionning body requires it.

c.

winders

True. With NASA, for example, you need the center net if you do not have a seat with lateral head protection.

Scott

333pg333

It's not a requirement of my respective sanctioning bodies, just that my car will be pretty damn fast and I won't have a halo. Will have hans.

kurt M

If the side net does not add problems why not use it? They are not expensive in relation to the rest of the safery systems and along with any head to body conection protection they might add are intended to guide you back into the seat at the end of a off angle hit.

333pg333

Do you mean center net or side net? Side net will be used although if the c/f doors ever get to me they will have lexan windows. Do people still use nets with lexan windows?

Charles A. Toupin

I think he means center. Not a requirement to have both (lexan + Net), depending on the sanctionning body again. I don't ever recall an SCCA car (as an example) with door windows. But I've never read the regulation about that. So it may possible.

I would use one or the other, but not both at the same time. Make removable lexan windows for the street and use only the net when on the track. You need fresh air in the car.

c.

333pg333

Well I was thinking about the window open or closed scenario Charles. The c/f doors that I have had made up (but probably never going to be delivered !!) were meant to have lexan with a sliding portion. The rear 1/4 windows were going to have the naca openings with some tube ducting running to me to cool or whatever else. I've always run with driver's window down to be able to signal but you would think aerodynamically it would be better to run with windows up or just a slider?

kurt M

Yes center net I left out the "right" of right side net. Oh wait, you are down under = left side net . lets go with "Center net"

CF doors are to be considered disposable in a wreck IMO. After the door is gone your arms are next in a floping around rollover.

333pg333

Good point....and down under as opposed to upside down is preferable.

333pg333

Well we added the gussets and made the decision to leave the top part out just for egress. Also dummied up the dash and fabbed the steering column extension. We've dropped the seat down and back about 6" so needed to be able to reach that round steery thingy in front. I'm liking it so far.

kurt M

A little late to the party but find the top gusset makes it easer to slide in and out. good flat spot for my BFA to sit on while going in feet first.

Unasked for nitpick. We welder types are funny this way. Feel free to disregard.
In the pictures some of the the welds look way undercut or small for the tube wall thickness for my comfort. The filler bead should extend out on each tube of a joint at least the thickness of the tube wall and there should be no undercut or area where the filler bead is less than the tube wall thickness. In one image, the top of the X, the weld is way undercut / too small IMO. Small undercut welds will fail through or at the edge of the weld well before the tube does. Undercut welds make the tube weaker right where you are also making a HAZ. One two punch for a joint failure.
Some shops seem to like to make small welds as they look nice and even and the clients like it but good looking and stronger than the tube are not always the same. You want "stronger than the tube"
Just basing this on what I see in the pix. Real life might be something else altogether. For some true pro review or even more unasked for opinions you can post at www.millerwelds.com there are some very experenced guys there along with the usual internet types.

Charles A. Toupin

That is going to be stiff!

Are going to add bars to the rear of the car?

c.

Iridium

In my area that cage wouldn't pass tech, as the diagonal bar just behind the drivers seat is supposed to hit the ceiling main hoop behind the driver. In your car it goes to the other side. Are you going to run an X?

333pg333

No more bars Charles. I see guys with bars running quite a long way back but I didn't want to reduce the crumple zone in the event it's ever needed.