should i call this part 3? lol. Jeff and I finished this cage yesterday. Interior has to get put in but the cage is done for the time being. comments? critique? criticism?

 

damn, you must be getting some damn good practice welding cages in lol. Are you trying to set the world record for most cages installed in a weak haha

 

what did you use to mold the mounting plate in the shape of a "(" at the rear shocktower???

just torched it and went to town with a hammer??? i have my cage to be put in but im jsut learnin how to weld so practice first.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dohcdelsol &raquo;</TD></TR><TR><TD CLASS="quote">
just torched it and went to town with a hammer??? i have my cage to be put in but im jsut learnin how to weld so practice first.</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdm..mk &raquo;</TD></TR><TR><TD CLASS="quote">those are some nice welds</TD></TR></TABLE>

x2

 

nice welds wat did you use to clean the pipes up tho?

 

 

"what did you use to clean the pipes up tho?"

A flap disc or sanding disc.
Wire buffing wheel will work also.

Another great cage.

 

nice fit. have you considered adding some plating down the a pillar and b pillar to help tie it more to the body?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdm..mk &raquo;</TD></TR><TR><TD CLASS="quote">those are some nice welds</TD></TR></TABLE>

x3

 

how much do you charge

 

Thanks for posting up these pics! I'm going to be installing a cage into my CRX in the next few months. I think this will really help me visualize what I need to do.

 

we cant post prices. this is not an advertisement thread.

 

WOW that looks sick!

 

you need to put some more welding rod in

 

Is this a drag race car or a road race car? If it is to legal for SCCA/NASA then the main hoop will need a single diagonal from corner to corner.

As far as the design, not bad, you really should try and connect the rear bars to the shock towers or the chassis floor instead of loading the middle of an unsupported cross tube. Also I would like to see you move the main hoop braces out further towards the upper hoop mounting points. If you can connect as many points as possible to or close to other points your cage will be stronger.

Excellent fit up. That will make your cages very strong. You should see some of the cages that come through my shop. Very scary fit ups.

 

Im not sure this would be legal for NHRA because of the rear section being tied into the shock towers with the bar across. Not only that but did you stress relieve the welds with post heat treating? I know not many people thing that it is necessary, but without the post heating the metal becomes brittle and the whole point of using chromoly is so you can use smaller thickness to have the same strength. Without post heating you are actually be making a cage that is not as strong as its mild steel counterpart. Just wanted to know how you guys did it. Love the fittment and the welds good luck!

 

looking pretty good wht material u use

 

If it is Chromoly and welded with the right rod you typically don't have to heat treat it or anneal it. The HAZ is pretty low when done properly with a TIG machine.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turboteener &raquo;</TD></TR><TR><TD CLASS="quote">If it is Chromoly and welded with the right rod you typically don't have to heat treat it or anneal it. The HAZ is pretty low when done properly with a TIG machine. </TD></TR></TABLE>
You should read some of the FAA things on airplane repair... when the aircraft is made of chromoly you have to heat treat it or the plane is said to be not safe...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Electron_LS-Vtec &raquo;</TD></TR><TR><TD CLASS="quote">Im not sure this would be legal for NHRA because of the rear section being tied into the shock towers with the bar across. Not only that but did you stress relieve the welds with post heat treating? I know not many people thing that it is necessary, but without the post heating the metal becomes brittle and the whole point of using chromoly is so you can use smaller thickness to have the same strength. Without post heating you are actually be making a cage that is not as strong as its mild steel counterpart. Just wanted to know how you guys did it. Love the fittment and the welds good luck!</TD></TR></TABLE>

I've seen this method used many times before, and no one has had any issues getting tech'd by NHRA. Not sure about the heating part tho.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Electron_LS-Vtec &raquo;</TD></TR><TR><TD CLASS="quote">
You should read some of the FAA things on airplane repair... when the aircraft is made of chromoly you have to heat treat it or the plane is said to be not safe...</TD></TR></TABLE>

I foresee a new how-to thread in this section.

"How to modify a normal home oven to accommodate heating structures as large as an automobile."

You really don't need to heat treat unless you're dealing with tubing over .125" thick.

 

A race car can't fall out of the sky and kill someone. Although in the past Dodge has recommended against building with Chromoly because of the inability to heat a chassis in an oven and relieve the welding stresses.

Now that said, if you look at AWS welding guides it is acceptable to weld a chromoly structure using a ER70S-2 rod without a preheat or post heat. You will be within 95% of the strength of the parent material.

 

[QUOTE=Electron_LS-Vtec]Im not sure this would be legal for NHRA because of the rear section being tied into the shock towers with the bar across.QUOTE]

My car passed perfectly with the same setup! actually just got my certification in december

 

As stated, heat treating IS NOT needed unless welding something over about .125". 4130 has been used for YEARS in racing, and never been heat treated. Youll never have a problem with tech inspection.
Kyle