Bouncy ride after TB crank?

[proroc]

It is just me, or have you guys noticed that your truck rides alot more bouncy or stiff after turing the tbars up a little? Im not sure if its the new sense-a-track shocks or the t-bar crank thats making my truck feel real bouncy...

[Mike H.]

It is your shocks. Reindexing the t-bar does nothing to the firmness of the ride, unless you crank it to the point that you are "topped out" and I don't think the stock porkchop has that capability.

You have done nothing to the bar other than rotate both ends. When you adjust your t-bar, as you turn the end at the porkchop, the other end in the a-arm turns by exactly the same amount, rotating your a-arms down. You would have to replace your torsion bar with a thicker, more torsionally stiff bar to change the "spring rate".

[killian96ss]

It is just me, or have you guys noticed that your truck rides alot more bouncy or stiff after turning the tbars up a little?

It seemed like my truck was more stiff up front, but not bouncy. When my truck was stock, going over speed bumps wasn't as harsh as it is now. I really don't see how this is possible since I didn't change my T-bars, just did a 3/4" crank and that's it. Is it possible that my mind is playing tricks on me?

[HenryJ]

It is just me, or have you guys noticed that your truck rides alot more bouncy or stiff after turning the tbars up a little?

It seemed like my truck was more stiff up front, but not bouncy. When my truck was stock, going over speed bumps wasn't as harsh as it is now. I really don't see how this is possible since I didn't change my T-bars, just did a 3/4" crank and that's it. Is it possible that my mind is playing tricks on me?

More than likely it is just that you are paying close attention.
There is the possibility that it could indeed be slightly stiffer though.

It is correct that by adjusting ("cranking") the T-bar you turn both ends of the bar the same amount, and the spring rate does not increase or decrease.

However the mechanical advantage applied to the spring (T-bar) decreases as the A-arm is rotated downward, and increases as it is lowered to the point of being horizontal, or 90* to the applied load.
Just think how stiff it would be if the A-arm pointed straight down The a-arm , effectively, gets shorter as it goes down, so you are losing the length of your lever.

[a2b]

yes normal

[adrenalnjunky]

It is just me, or have you guys noticed that your truck rides alot more bouncy or stiff after turning the tbars up a little?

It seemed like my truck was more stiff up front, but not bouncy. When my truck was stock, going over speed bumps wasn't as harsh as it is now. I really don't see how this is possible since I didn't change my T-bars, just did a 3/4" crank and that's it. Is it possible that my mind is playing tricks on me?

More than likely it is just that you are paying close attention.
There is the possibility that it could indeed be slightly stiffer though.

It is correct that by adjusting ("cranking") the T-bar you turn both ends of the bar the same amount, and the spring rate does not increase or decrease.

However the mechanical advantage applied to the spring (T-bar) decreases as the A-arm is rotated downward, and increases as it is lowered to the point of being horizontal, or 90* to the applied load.
Just think how stiff it would be if the A-arm pointed straight down The a-arm , effectively, gets shorter as it goes down, so you are losing the length of your lever.

Stupid physics!

[Mike H.]

It is correct that by adjusting ("cranking") the T-bar you turn both ends of the bar the same amount, and the spring rate does not increase or decrease.

However the mechanical advantage applied to the spring (T-bar) decreases as the A-arm is rotated downward, and increases as it is lowered to the point of being horizontal, or 90* to the applied load.
Just think how stiff it would be if the A-arm pointed straight down The a-arm , effectively, gets shorter as it goes down, so you are losing the length of your lever.

You caught me. Very true. I was neglecting the small change in the distance of the vertical force from the point of rotation. It is very small difference though.

Geez, if I included every small detail like that, I'd never get a design out the door.

[coffeedrnkr]

Where would I go about getting some aftermarket heavy duty torsion bars for an s-10 blazer?