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Re: Interesting torsion bar discovery...
[Re: MuuMuu101]
#2567671
10/22/18 04:12 AM
10/22/18 04:12 AM
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Joined: Feb 2010
Posts: 18,493 Granite Bay CA
Kern Dog
Striving for excellence
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Striving for excellence
Joined: Feb 2010
Posts: 18,493
Granite Bay CA
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The B body bar will have about 10% more twist in the torsion bar for the same diameter, material property, and torque.
10% more twist? Do you mean that it is less effective because it twists MORE or more effective because it resists twist 10% more ?
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Re: Interesting torsion bar discovery...
[Re: Kern Dog]
#2567807
10/22/18 01:35 PM
10/22/18 01:35 PM
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Joined: Dec 2010
Posts: 12,375 SoCal
MuuMuu101
I got lucky at Woodward!
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I got lucky at Woodward!
Joined: Dec 2010
Posts: 12,375
SoCal
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The B body bar will have about 10% more twist in the torsion bar for the same diameter, material property, and torque.
10% more twist? Do you mean that it is less effective because it twists MORE or more effective because it resists twist 10% more ? Because the B-body T-bar is longer, it is less effective because it twists more.
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Re: Interesting torsion bar discovery...
[Re: DrCharles]
#2568309
10/23/18 12:55 PM
10/23/18 12:55 PM
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Joined: Jan 2003
Posts: 5,405 Pikes Peak Country
TC@HP2
master
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master
Joined: Jan 2003
Posts: 5,405
Pikes Peak Country
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A 1" B body bar is 175# wheel rate. A 1" A body bar is 195# wheel rate. Wheel rates are the springs applied force at the center of the tire's contact patch. This is how you can compare different spring rates and suspension designs to come to an apples to apples comparison of rates.
In my experience, a larger bar gives up an amount of 60' time, however, it will be much more consistent and repeatable than a lighter bar and 90/10 shocks.
My drag car with SS rear, light front end rates, no sway bars, and adjustable drag shocks would run 12.2-12.6 and was variable with track prep and atmospheric conditions. The same driveline in my handling car with heavy t-bars, large front and rear sway bars and much wider tires all around would run 13.2 run after run after run. If you're a bracket racer, you know which one you need to have to win.
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Re: Interesting torsion bar discovery...
[Re: DrCharles]
#2571072
10/29/18 04:37 PM
10/29/18 04:37 PM
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Joined: Jan 2010
Posts: 1,443 NW Chicago suburban area
Mopar Mitch
pro stock
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pro stock
Joined: Jan 2010
Posts: 1,443
NW Chicago suburban area
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I've tried many different sizes of TBs in the Challenger... and some different shocks.. and different leaf springs... for the purpose of competition AX/HSAX... settled with the 1.24 TBs... they are great! Yes stiff, but still drivable on the street and highway... as long as you avoid rough roads (race tracks typically are smooth!). Tire pressures and sidewall aspect ratios matter, as well, so, it becomes a compromise to accept what you've got and learn to drive the car with the setup. A benefit of larger TBs is that they also reduce lift and dive.
Mopar Mitch
"Road racers and autocrossers go in deeper and come out harder!"... and rain never stops us from having fun with our cars... in fact, it makes us better drivers!
Check out MOPAR ACTION MAGAZINE, August 2006 issue for feature article and specs on my autocross T/A!
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