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 Post subject: torsion bars
PostPosted: Tue Aug 07, 2018 5:10 pm 
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Location: Burton BC canada
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I store a parts car at a friends. I can pay him to remove parts on the car for me.

The 78 Cordoba has a big block and likely has bigger bars than my 95# bars.

The bigger bars would likely be the #100 bars.

Is the difference worth spending $75 and some time to install?

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 Post subject: Re: torsion bars
PostPosted: Tue Aug 07, 2018 6:05 pm 
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95# to 100# would not be worth changing, but I bet the difference is bigger than that.

Lou

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 Post subject: Re: torsion bars
PostPosted: Tue Aug 07, 2018 6:35 pm 
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https://www.forabodiesonly.com/mopar/at ... 714994906/

I have the .940 bars,,,,, can get .960

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 Post subject: Re: torsion bars
PostPosted: Wed Aug 08, 2018 4:05 am 
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Maybe your friend can put a caliper on them before removing? I guess it's better than no change and it is possible you could notice a difference.

Lou

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 Post subject: Re: torsion bars
PostPosted: Wed Aug 08, 2018 4:52 am 
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Joined: Thu May 12, 2005 11:50 pm
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Location: So California
Car Model*: 64 Plymouth Valiant
A small diameter change makes a big difference.

The stiffness increase is to the 4th power.

A 1.1" diameter bar would be (1.1 / 1.0)^4 or 1.4641 times stiffer than a 1.0" bar
(if the 1.0" bar was 100lbs, the 1.1" would be 146lbs)

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64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes
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 Post subject: Re: torsion bars
PostPosted: Wed Aug 08, 2018 5:26 am 
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Yep, well aware of the 4th power dependence. Thanks, Ed. In this case, it's a very small diam difference and he gets a 5% rate increase.

Lou

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