Re: moly or mildsteel cage?
[Re: Pleaz]
#169613
12/17/08 11:00 PM
12/17/08 11:00 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Quote:
Im having my mild steel cage taken out and replaced with a moly one. Does a moly cage go brittle after 4, or 5 years? Where a mild steel cage can last up to 15 years? If this is the case, ill just save my money. The weight difference cant be that much anyway. Im not sure if i should stick with what i got, or replace it.
No, a moly chassis does NOT turn brittle in 4 or 5 years that BS. The weight isnt all that much lighter but it is lighter, I dont have the numbers in front of me what the difference is in a foot. Its up to you weather you replace it or not, they do cost more because its all tig welded, but a moly chassis is more rigid
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Re: moly or mildsteel cage?
[Re: 4404dart]
#169616
12/17/08 11:21 PM
12/17/08 11:21 PM
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Joined: Aug 2003
Posts: 43,285 Bend,OR USA
Cab_Burge
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Quote:
I'd do a moly cage. It will last forever, it's worth more if you sold the car. You can put the weight you save somewhere else, or just save the weight.
I also agree with MRPBODY, the moly cage is stronger, safer, lighter and better in a crash, especially on a drag car. That being said NASCAR wants mild steel, probally because a lot of the good old boys do a lot of the work themselves in the lower, slower local race cars and they don't want them trying to weld chrome moly with a OX Acetelene torch
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: moly or mildsteel cage?
[Re: Cab_Burge]
#169617
12/17/08 11:27 PM
12/17/08 11:27 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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I also agree with MRPBODY, the moly cage is stronger, safer, lighter and better in a crash, especially on a drag car. That being said NASCAR wants mild steel, probally because a lot of the good old boys do a lot of the work themselves in the lower, slower local race cars and they don't want them trying to weld chrome moly with a OX Acetelene torch
I believe they use mild due to them busting up their cars all the time and always replacing tubing and they have a PILE more tubing in their cars plus they have a pretty high minimum weight
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Re: moly or mildsteel cage?
[Re: MR_P_BODY]
#169618
12/17/08 11:44 PM
12/17/08 11:44 PM
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Joined: Apr 2005
Posts: 12,271 Overpriced Housing Central
RobX4406
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Quote:
I also agree with MRPBODY, the moly cage is stronger, safer, lighter and better in a crash, especially on a drag car. That being said NASCAR wants mild steel, probally because a lot of the good old boys do a lot of the work themselves in the lower, slower local race cars and they don't want them trying to weld chrome moly with a OX Acetelene torch
I believe they use mild due to them busting up their cars all the time and always replacing tubing and they have a PILE more tubing in their cars plus they have a pretty high minimum weight
Has to do with the tube absorbing shock loads. Moly being more rigid, transfers more load to the driver than mild steel.
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Re: moly or mildsteel cage?
[Re: Pleaz]
#169619
12/17/08 11:53 PM
12/17/08 11:53 PM
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Joined: Mar 2008
Posts: 768 Ohio
Dan Brewer
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I would rather wreck a car with a MS cage than moly any day. I sure wouldn't cut out a legal ms cage to replace, It is only lighter because it is thinner wall tubing.
Last edited by rapidfire64; 12/18/08 12:11 AM.
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Re: moly or mildsteel cage?
[Re: Pleaz]
#169621
12/18/08 12:09 AM
12/18/08 12:09 AM
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Joined: Jan 2003
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Al_Alguire
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Not sure I agree with that statement..Here is a question you need to ask yourself. How fast do you plan to go with this car? If it is just a rollbar I dont see the added expense of it being Moly worth the hassle. I suggest you build whatever your budget will allow for the ET you are after. You may find after pricing it out that the money spent for a moly bar will be batter spent elsewhere. FWIW my car is a Mild Steel certed to 7.50...
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: moly or mildsteel cage?
[Re: 72sat]
#169624
12/18/08 12:14 AM
12/18/08 12:14 AM
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Joined: Jan 2003
Posts: 19,382 Las Vegas
Al_Alguire
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Well if it is only for certification then unless you plan on running faster than 7.50 mild steel is fine.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: moly or mildsteel cage?
[Re: 604 Hemi GTX]
#169627
12/18/08 12:51 AM
12/18/08 12:51 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Quote:
moly is more brittle, so wouldn' it be more prone to cracking or is that just a myth.
Why is it more brittle Its stronger with less flex
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Re: moly or mildsteel cage?
[Re: MR_P_BODY]
#169628
12/18/08 01:41 AM
12/18/08 01:41 AM
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Joined: Jan 2003
Posts: 995 Boynton Beach, Fl
Rapid588
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While it is true mild steel has a little 'give' to it, these top 2 examples of 10 second 'mild steel' cages gave way too much..... the top one was coming in on the driver and had already failed...... the second pic of a buddy of mines cage also was 'giving' and was a hairs breath away of crushing him when he got into a little (very little) antifreeze of another car that had just run. It may be hard to see in these pics unless you can zoom in, but both these mild steel cages deflected WAY too much for safety. This next moly caged car hit and went over the wall at Orlando and disentegrated, but the moly cage did not deflect at all and integrity of chassis was still 100% intact.
93 Dodge Stealth - Supercharged 526ci Hemi 93 Dodge Daytona Top Sportsman injected 588 Hemi - plus a lil NOS 67 Hemi GTX (may the 4speed with you!)
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Re: moly or mildsteel cage?
[Re: Rapid588]
#169629
12/18/08 02:43 AM
12/18/08 02:43 AM
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Joined: Aug 2003
Posts: 43,285 Bend,OR USA
Cab_Burge
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Quote:
While it is true mild steel has a little 'give' to it, these top 2 examples of 10 second 'mild steel' cages gave way too much..... the top one was coming in on the driver and had already failed......
the second pic of a buddy of mines cage also was 'giving' and was a hairs breath away of crushing him when he got into a little (very little) antifreeze of another car that had just run.
It may be hard to see in these pics unless you can zoom in, but both these mild steel cages deflected WAY too much for safety.
This next moly caged car hit and went over the wall at Orlando and disentegrated, but the moly cage did not deflect at all and integrity of chassis was still 100% intact.
A picture is woorth a 1000 words, these three speak volume of why all the Pro cars use chrome moly tubing in there cars. Weight and speed have a lot to do on the total impact loads, I would rather be a in a car(and I am) with a chrome moly bar or cage than mild steel any day that I'm in a crash
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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