roll cage - Page 2

Wickd GT · 02-13-2007, 05:21 AM

Quote:

Originally Posted by 96GTS

It's 430, go to bed loser!!

I was definitely impressed w/ it. A guy I used to race with had an SW in his 03 GT. You could fit your fist b/t the A piller and the bar and the upper bars were 2+" from the headliner. They are cheap and I was gonna go w/ them until I saw that...

I'm going to disagree with you on that. S&W has a good cage, they come a bit longer so it can be trim to fit the way you want. Mine I fitted then measure how much I'll cut then fitted it again, then weld it were I wanted, matter of fact you have to look for the top of the cage, and I still can take my T Tops off. Just had it recertify and the inspector complimented on it.

Edgar

coupe · 02-13-2007, 08:27 AM

Quote:

Originally Posted by QWKSNKE

Chrome Moly is only good for 3 nhra certifications

Where'd you find this at?

I second the "Wolfe" stuff btw.

QWKSNKE · 02-13-2007, 12:35 PM

Quote:

Originally Posted by coupe

Where'd you find this at?

I second the "Wolfe" stuff btw.

Either Edgar or Rob found this out when checking on cage work

96GTS · 02-13-2007, 01:10 PM

Quote:

Originally Posted by Wickd GT

I'm going to disagree with you on that. S&W has a good cage, they come a bit longer so it can be trim to fit the way you want. Mine I fitted then measure how much I'll cut then fitted it again, then weld it were I wanted, matter of fact you have to look for the top of the cage, and I still can take my T Tops off. Just had it recertify and the inspector complimented on it.

Edgar

hmmm...maybe they use the fox cage for the 94+...?? The inside of a fox is smaller and that would explain why yours fit tight and on an 03, it was horrible. All I've seen of SW is that cage and a roll bar (6pt) in a 99 Cobra, and that was just as bad.......

96GTS · 02-13-2007, 01:11 PM

Also, my buddy at work races super comp gas (or something like that....its a chebby). Its an open top roadster style car and has had his 'moly cage since the early 90s. He just got it recertified last month.???

coupe · 02-13-2007, 02:26 PM

Quote:

Cage certifications and Chrome Moly...

Chrome Moly does not expire on its certifications...Pat Cvengros at NHRA confirmed this.

Chrome Moly alloy is better in every instance over it's mild-steel alternative. It does not weaken with age, nor will it embrittle. It can be made with a thinner wall tube than mild steel, thus a substantial weight savings over the entire cage assembly.

96GTS · 02-13-2007, 02:33 PM

Quote:

Originally Posted by coupe

Chrome Moly does not expire on its certifications...Pat Cvengros at NHRA confirmed this.

Chrome Moly alloy is better in every instance over it's mild-steel alternative. It does not weaken with age, nor will it embrittle. It can be made with a thinner wall tube than mild steel, thus a substantial weight savings over the entire cage assembly.

Its the opposite. 'moly DOES get brittle. And it is weakened after welding. If it was possible to heat treat the entire cage after welding, it would be stronger, but in an impact 'moly will crack/break whereas MS will bend. Making up for a couple pounds of MS is just a jet change away IMO.

coupe · 02-13-2007, 03:42 PM

Chrome moly (4130) is .30 percent Carbon which is still considered a low to medium carbon alloy. Carbon is the main ingredient that causes brittleness, but really only becomes a factor above, say .50 (that's 1/2) percent. Although I'm not sure of carbon equivalency value, I still have never seen issues with it for weldability. It's very durable, even on impact. I think there are some misconceptions about chrome moly.

96GTS · 02-13-2007, 03:49 PM

Quote:

Originally Posted by coupe

Chrome moly (4130) is .30 percent Carbon which is still considered a low to medium carbon alloy. Carbon is the main ingredient that causes brittleness, but really only becomes a factor above, say .50 (that's 1/2) percent. Although I'm not sure of carbon equivalency value, I still have never seen issues with it for weldability. It's very durable, even on impact. I think there are some misconceptions about chrome moly.

I'm going off what my buddy who did my cage told me. He's been welding since the 70s and welds aluminum/titanium/magnesium/and other cool stuff all day at work at Boeing aerospace. I trust his knowledge of the metals over a standard chassis shop guy personally

QWKSNKE · 02-13-2007, 04:20 PM

Quote:

Originally Posted by 96GTS

Its the opposite. 'moly DOES get brittle. And it is weakened after welding. If it was possible to heat treat the entire cage after welding, it would be stronger, but in an impact 'moly will crack/break whereas MS will bend. Making up for a couple pounds of MS is just a jet change away IMO.

Remember where I heard it now.

The guy that installed Edgar's minitubs is the one that stated chromemoly cages expire after the 3rd recert. He also mentioned that there is not enough weight savings to pick chrome moly over mild steel to justify the cost.

Also, I thought fox body cars had more room in the interior compared to any 94-up stang

02-13-2007, 01:11 PM	#15
96GTS Mine's bigger... Join Date: Dec 2004 Location: SoCal Posts: 1,060	Also, my buddy at work races super comp gas (or something like that....its a chebby). Its an open top roadster style car and has had his 'moly cage since the early 90s. He just got it recertified last month.??? __________________ 323rwhp \| 320rwtq - 4VNA 12.13 @ 113.36 \| 1.63 60'

02-13-2007, 03:42 PM	#18
coupe Super Moderator Join Date: Dec 2004 Posts: 6,313	Chrome moly (4130) is .30 percent Carbon which is still considered a low to medium carbon alloy. Carbon is the main ingredient that causes brittleness, but really only becomes a factor above, say .50 (that's 1/2) percent. Although I'm not sure of carbon equivalency value, I still have never seen issues with it for weldability. It's very durable, even on impact. I think there are some misconceptions about chrome moly. __________________ " If you can't explain it simply, you don't understand it well enough. " - Albert Einstein Last edited by coupe; 02-13-2007 at 03:45 PM.