Our new sponser,Cp racing, carries a 4point nhra legal cage for $205 shipped! Goto products then chassis.



http://www.cpracing.ca/productimages/2g4point.jpg

I find it rather uninspiring. I'm sure it would do it's job in a roll over, but it looks like you could bolt it into any one of a dozen different cars.

With the main hoop so far from the edge of the car, haw far back can you move the seat? Then how close is it to your head?

At least it goes to the cross member and not to the floor. https://www.nopistons.com/forums/pub...IR#>/smile.png

isn't the cage supposed to be links to the shock towers in the back?

isn't it supposed to go thru the floor and not the cross member?

thats what i thought too mike

Is it SCCA legal????, they are a better judge of what a cage needs to be IMHO.

Well if the car rolls over onto the roof, do you want the cage to be pushing on a single layer of unsupported sheet metal, or on a reinforced section of box steel?

It would be better if it attached at the edge of the car, where a major "rib" is located. The metal that it's resting on now may not be much better than the floor, as far as strength is concerned, but at least it's a box, and not just a sheet.

The same is true for the rear down tubes... What are they going to on the floor? What's under there that is important? I think it should go to the top of the struts for two reasons. First, all of the spring loads (obviously) go through there so any bending/twisting (if they're in an X) load into the chassis can be helped with the cage. And two in a roll over the strut towers are fairly triangulated with the rest of the chassis. So it all goes back to attaching the cage to the major nodes of the unibody.

I'm not a cage builder, these are just my opinions as a car enthusiast with just enough engineering experience to be dangerous. I'm not trying to slam CP Racing... you asked. https://www.nopistons.com/forums/pub...R#>/tongue.png https://www.nopistons.com/forums/pub...IR#>/smile.png

i dont like it

thats not a cage. thats a roll bar.



kevin.

"CP racing custom roll cage 1 3/4 tube with an .095 wall, mandrel bends, can be welded or bolted into vehicle,requires NO ASSEMBLY of cage, all prewelded just painting required. Easily installed by removing seats and slipping into place. Can be used with or without interior, perfect for road course, drag, show cars or drifting. Seats can still be moved back all the away without hitting cross brace, allows for harness mounting(email for price on disassembled cage.) Price includes shipping to your door anywhere in Canada or the United States." - CpRacing





Thxs for the input guys. Its just soo cheap! I mean damn I would love a 8-10point my fc, but thats going to be Spendy..

seriously tho, its NOT a cage. it's a rollbar. depending on the speed of your car you need to know the difference, IIRC you need a bar if you're in the 11's and a cage if you're in the 10's.



kevin.

get the car running first! or donate to the buy ryan another TII fund. https://www.nopistons.com/forums/pub...1047683785.gif

Cages run the entire length of the cockpit.

Soon the motor will be back in.. Hey this was just a christmans present idea..

in the ad you quoted it doesnt say NHRA legal, and thats a roll bar, not

a cage.



NHRA rules:

4.10 ROLL BARS



All roll bars must be within 6-inches (15.2 cm) of the rear, or side, of the driver's head, extend in height at least 3-inches (7.6 cm) above the driver's helmet with driver in normal driving position, and be at least as wide as the driver's shoulders or within 1-inch (2.5 cm) of the driver's door. Roll bar must be adequately supported or cross-braced to prevent forward or lateral collapse of roll bar. Rear braces must be of the same diameter and wall thickness as the roll bar and intersect with the roll bar at a point not more than 5-inches (12.7 cm) from the top of the roll bar. Sidebar must be included on driver's side. The side bar must pass the driver at a point midway between the shoulder and elbow. All vehicles with OEM frame must have roll bar attached to frame; installation of frame connectors on unibody cars does not constitute a frame and therefore it is not necessary to have the roll bar attached to the frame. Unibody cars with stock floor and firewall (wheel tubs permitted) may attach roll bar with 6-inch (15.2 cm) x 6-inch (15.2 cm) x .125-inch (3.2 mm) steel plates on top and bottom of floor bolted together with at least four 3/8-inch (9.53 mm) bolts and nuts, or weld main hoop to rocker sill area with .125-inch (3.2 mm) reinforcing plates. All 4130 chrome moly welding must be done by approved TIG Heliarc process; mild steel (or ST51) welding must be approved MIG wire feed or approved TIG heliarc process. Welding must be free of slag and porosity. Any grinding of welds prohibited. See illustration (Drawing 12).



Roll bar must be padded anywhere driver's helmet may contact it while in driving position. Adequate padding must have minimum 1/4-inch (6.35 mm) compression or meet SFI Spec 45.1.

I emailed them, thats what they told me.

that thing is a 4 point bar, I cant see how it would be considered

legal without side bars???

and if you say the piping diameter is 1 3/4, then those front mounts

dont look anywhere near 6"x6" then anyhow.

looks cheesy

here you go:

http://www.nhra.com/images/rollbar.gif

http://www.stable-energies.com/autopower/autopwr.html



Whats the difference between DOM and ERW steel? Look like im going to get their full bolt in cage.

Revvin, this is my opinion on the deal. Don't skimp on something that is going to help keep you alive! My cage is going to cost $850 and is being completely custom built for my FC. Honestly, I don't trust buying anything that is "bolt-in" as far as cages go...get one custom down that you know will work. Rob pretty summed up all the tech stuff so I'm not going to repeat it...besides I know a bunch of tech inspectors that will not let a car into the 10s w/ that "cage"....





BTW...I'm getting an 8pt https://www.nopistons.com/forums/pub...#>/biggrin.png It also helps to have a local guy who builds tube chassis and cages for a living only 40min away https://www.nopistons.com/forums/pub...IR#>/bigok.gif

It's how the tubing is manufactured.

DOM- drawn over mandrel

ERW - electrical resistance weld

I'm not clear on the finer points of each, but I don't think SCCA will certify ERW any more. Not sure about NHRA.

Good luck

Yea maybe I should just look for a local place, I seriously doubt there is one up here though. DOm it is then...

That boxed in part will colapse. And shouldnt there be a bar going across the rear bars too? I dont see much support in keeping bending to the side.

yah i'm with you on this one