Weight. - Ford Mustang Forums : Corral.net Mustang Forum
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post #1 of 13 Old 02-04-2019, 03:48 PM Thread Starter
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Weight.

I pulled the entire interior out but added an 8 point full race cage. Leaving the glass. And adding torque arm and PHB. Just curious. Am I saving any weight.?

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post #2 of 13 Old 02-04-2019, 05:25 PM
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I weigh pretty much everything that I add or remove from my car, and I scale it after any major changes to get my weight distribution and set my corner weights.

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post #3 of 13 Old 02-05-2019, 11:49 AM
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I pulled the entire interior out but added an 8 point full race cage. Leaving the glass. And adding torque arm and PHB. Just curious. Am I saving any weight.?
It's hard to say without actually weighing everything as you do it, but I'd guess you're adding weight. A roll cage, TA & PHB are 3 big chunks of steel.

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post #4 of 13 Old 02-05-2019, 12:37 PM
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A chrome moly roll cage can be 100 lbs lighter than one out of mild steel.

1989 Saleen 414 358cid SBF 2.8L Kenne Bell S/C
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Best 1/4 mile time 8.623 @ 159.82 mph with a 1.34 60' (5.57 1/8th at 128)
Best 1/8 mile time 5.339 @ 133.46 mph with a 1.29 60'
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post #5 of 13 Old 02-05-2019, 08:55 PM
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There is about less than ~1# of weight difference between 1' of 4130 CM and 1' of .134 wall ERW (MS). In an 8-point cage the difference is probably only ~20# or less and 4130 is several times more expensive than MS.
If you're to the point where you're only doing mild weight reduction and leaving glass in the car, don't waste the money on CM.
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post #6 of 13 Old 02-06-2019, 06:34 AM
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There is a lot more than 20 feet of tubing in a 8 point cage.

1989 Saleen 414 358cid SBF 2.8L Kenne Bell S/C
26 X 8.5 Hoosier
Best 1/4 mile time 8.623 @ 159.82 mph with a 1.34 60' (5.57 1/8th at 128)
Best 1/8 mile time 5.339 @ 133.46 mph with a 1.29 60'
08' Bullitt #4097 N/A 340ish RWHP <<<<<FOR SALE!
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post #7 of 13 Old 02-06-2019, 01:27 PM
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All steel has virtually the same density. The rollcage will weigh the same no matter which steel alloy it is made of, assuming the same dimensions. If you use a steel alloy with a higher yield strength, then you can use a thinner wall thickness and the rollcage will weigh less. However, the rollcage will be less stiff. The modulus of elasticity of most steel alloys is the same. Use a thinner wall thickness and the cage will be less stiff, no matter what alloy is used.
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post #8 of 13 Old 02-09-2019, 09:13 AM Thread Starter
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I used a chrome moly cage. I thought I was making the car lighter by stripping the interior but I was surprised by how light most of the interior is. I'm guessing there won't be much weight savings but at least it won't rip itself apart. 1-3/4" x .095 wall
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post #9 of 13 Old 02-09-2019, 06:06 PM
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Nicely designed rollcage. Straight tubes. No part of it extends into the crush zone of the body.

If you have the chance, add a diagonal to the roof.

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post #10 of 13 Old 02-10-2019, 05:29 PM Thread Starter
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Like this. It's not quite complete in those pics.

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post #11 of 13 Old 02-11-2019, 06:58 AM
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What cage is that? Custom or does someone sell it like that? Thanks.
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post #12 of 13 Old 02-11-2019, 07:04 AM Thread Starter
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What cage is that? Custom or does someone sell it like that? Thanks.
It's a custom cage.
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post #13 of 13 Old 02-11-2019, 07:14 AM
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Thanks, very nice.
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