RE: {Chrysler 300} Torsion Bar Spring Rates - 1963 300J review Car Life
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RE: {Chrysler 300} Torsion Bar Spring Rates - 1963 300J review Car Life Mag



My 300C rides as if it has no suspension at all. I know from my old sprint cars days if you wind up or back off the torsion bar, it changes the spring rate. Is here a way to unwind or soften the torsion bar to change the spring rate without changing the ride height?

 

Henry Mitchell

      300C

 

From: chrysler-300-club-international@xxxxxxxxxxxxxxxx <chrysler-300-club-international@xxxxxxxxxxxxxxxx> On Behalf Of Rich Barber
Sent: Wednesday, May 03, 2023 9:29 PM
To: 'James Douglas' <jdd@xxxxxxxxxx>; 'Chrysler 300 List Server' <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Subject: RE: {Chrysler 300} Torsion Bar Spring Rates - 1963 300J review Car Life Mag

 

The article indicates a torsion bar diameter increase of about 2% (1.01” on a J vs. 0,99” otherwise.  Strength of materials teaches that torsional strength of a round bar in torsion is proportional to its diameter to the 4th power.  A 2% increase in diameter results in an increase in torsional bar by 8.3%. 

 

I don’t find the ride on our 300K to be stiff—just barely firm as compared to the ’67 Shelby Hurst Mustang I rented once.  Rode like a brick truck.

 

Rich Barber

Brentwood, CA

 

From: 'James Douglas' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Sent: Wednesday, May 3, 2023 9:50 AM
To: Chrysler 300 List Server (chrysler-300-club-international@xxxxxxxxxxxxxxxx) <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Subject: {Chrysler 300} Torsion Bar Spring Rates - 1963 300J review Car Life Mag

 

I wanted to attach an article I ran across from 1963. It is a review of the 300J. In it they go into detail about the changes to torsion bar spring rates.

 

Invaluable data to those who may need new bars or want to upgrade their bars-rates for a little firmer handling.

 

James

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