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Robispec Chassis/Harness Bar

Originally Posted by Sh0velMan Yeah probably. Stock bar is very light. 3" diameter steel is not. I would like to know what thickness/alloy they're using. Same here since I can

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Old 08-29-2013, 04:12 PM   #1 (permalink)
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Originally Posted by Sh0velMan View Post
Yeah probably.

Stock bar is very light.

3" diameter steel is not.

I would like to know what thickness/alloy they're using.
Same here since I can knock it out easy.

Based on this I'd just get a mild steel in cold roll since its stronger but make sure its DOM or ERW since are cars are heavy and its 3", not 2" which cages are.
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Old 08-30-2013, 07:18 AM   #2 (permalink)
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Same here since I can knock it out easy.

Based on this I'd just get a mild steel in cold roll since its stronger but make sure its DOM or ERW since are cars are heavy and its 3", not 2" which cages are.
yeah my cage is 1.75" .120 wall DOM.

3" .120 wall DOM would be what I'd make this bar of if I were going to do it. Gonna be heavy tho.
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Old 08-30-2013, 08:08 AM   #3 (permalink)
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yeah my cage is 1.75" .120 wall DOM.

3" .120 wall DOM would be what I'd make this bar of if I were going to do it. Gonna be heavy tho.
Well someone weighed theirs and it was 8lbs. So if 0.12 is heavier, than robispec uses thinner wall.
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Old 08-30-2013, 08:20 AM   #4 (permalink)
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Well someone weighed theirs and it was 8lbs. So if 0.12 is heavier, than robispec uses thinner wall.
3" .120 DOM is around 3.7 pounds per foot.

I'd guess they're more in the .08 or even .06 range.
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Old 08-30-2013, 09:35 AM   #5 (permalink)
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3" .120 DOM is around 3.7 pounds per foot.

I'd guess they're more in the .08 or even .06 range.
Well it ant a roll bar, it's a chassis stiffener so even 0.6 should do its job.

So ill say it again, only do a seat belt off a roll cage only.
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Old 08-30-2013, 09:43 AM   #6 (permalink)
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Well it ant a roll bar, it's a chassis stiffener so even 0.6 should do its job.

So ill say it again, only do a seat belt off a roll cage only.
For chassis stiffening, you don't need anything more than the stock bar.

This is for harness mounting, which I think .06 is woefully inadequate for.
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