Torque arm geometry help
Torque arm geometry help I'm putting a 9 inch solid axle under my GTO as well as a torque arm suspension similar to an F body. Right now I've got the housing on jack stands and am determining how I want to mount the front TA cross member in the tunnel. It will be a custom job so I need to get this right.
I'm using a UMI torque arm seen in the picture below. With the car sitting at ride height, is it ideal to have the top bar of the torque arm horizontal to the ground? The front mount point will have adjustable height, so I'm trying to determine if the lowest setting should be level with the ground, then have adjustability upward, or am I thinking about this the wrong way?
Any help is greatly appreciated.
I'm using a UMI torque arm seen in the picture below. With the car sitting at ride height, is it ideal to have the top bar of the torque arm horizontal to the ground? The front mount point will have adjustable height, so I'm trying to determine if the lowest setting should be level with the ground, then have adjustability upward, or am I thinking about this the wrong way?
Any help is greatly appreciated.
The change in the front mounting of the torque arm up or down will change the instant center.
http://www.pro-touring.com/threads/8...-Nice-rear-end!
http://www.baselinesuspensions.com/i...A_Drag_Car.htm
http://www.pro-touring.com/threads/8...-Nice-rear-end!
http://www.baselinesuspensions.com/i...A_Drag_Car.htm
The answer is not so simple to this. It is all comparative to your lower control arm angles. The theoretical point at which the lines of the torque arm and lower control arms would meet, if they were extended out far enough are known as the instant center point. The idea is to get this point close tot he vehicle's center of gravity so that the rear suspension is pulling up on the main weight of the car. There are a lot of variables in doing this. Set up your lower control arms and ride height together to figure your torque arm angle. If you mount the torque arm in a parallel position, you will want some angle on the lower control arms. Or, if you mount the lower control arms parallel, you will want some angle in the torque arm
Thanks gents, that's helpful for sure but Im asking something a little different. Im making my own front crossmember, and welding it in. I need to figure out at what height I should fabricate it.
Should the lowest mounting point of the poly mount be level with the ground, and have adjustability upward?
Should the lowest mounting point of the poly mount be level with the ground, and have adjustability upward?
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Nice Kinematic[Geometric] drawing to determine IC! Unfortunately,it applies to a 4-link,not a LCA&TA suspension! The arc that the rear axle describes is determined solely by the LCA's. Also,the TA does not transmit any horizontal force vector to be summed to that of the LCA's! It only has a vertical component,to resist the torque generated by the tires. Think"Swing Axle"!
Ok so just to clarify something, the angle of the torque arm can be set at 0* (level) if I have adjustable LCA mounts on the housing? Right now for mock up, I've got the trans at 2* down, the housing pinion angle 2* up, and the torque arm angle at 0*...Haven't welded on the LCA brackets to mess with those angles.
