Rear control arm bracing really needed?

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Tire diameter - 28
Center of gravity - 20
Wheelbase - 117

I know that my angles are still out of whack but it is much better than before!
 
Upper control arm length - 10
Lower control arm length - 19
Rear upper arm bolt height - 16
Front upper arm bolt height - 16.5
Rear lower arm bolt height - 8.5
Front lower arm bolt height - 9.75

I was asking about the angles...angles of your rear control arms and your anti squat line
 
I was asking about the angles...angles of your rear control arms and your anti squat line

He did technically give you the info you want

If the upper arm is 10" long and the front bolt is a 1/2" higher than the rear bolt then the arm slopes up from rear to front at an angle of ~2.86 degrees.

(sin^-1(.5/10) = ~2.86 degrees)

If the lower arm is 19" long and the front bolt is 1.25" higher than the rear bolt then the arm slopes up from rear to front at an angle of ~3.77 degrees.

(sin^-1(1.25/18) = ~3.77 degrees)

From there you can find the IC and such. Given that the upper arm slopes up, your IC must be pretty far forward like you have said.
 
He did technically give you the info you want

If the upper arm is 10" long and the front bolt is a 1/2" higher than the rear bolt then the arm slopes up from rear to front at an angle of ~2.86 degrees.

(sin^-1(.5/10) = ~2.86 degrees)

If the lower arm is 19" long and the front bolt is 1.25" higher than the rear bolt then the arm slopes up from rear to front at an angle of ~3.77 degrees.

(sin^-1(1.25/18) = ~3.77 degrees)

From there you can find the IC and such. Given that the upper arm slopes up, your IC must be pretty far forward like you have said.

Yes it is, but this is with the front of the uppers lower an inch and a half from before. So it is significantly improved. You seem pretty educated about this so I'll ask you...lowering the rear of the lowers will move the IC further back which should also help right? Only downside is it will still be kinda high...
 
Yes it is, but this is with the front of the uppers lower an inch and a half from before. So it is significantly improved. You seem pretty educated about this so I'll ask you...lowering the rear of the lowers will move the IC further back which should also help right? Only downside is it will still be kinda high...

I wouldn't say educated but I sort of understand the idea.

Yes, moving the front of the uppers down should have moved the IC back some. However, I believe the upper should be pointing down if possible.

Moving the rear bolt of the lowers down will both move the IC back as well as up.

Ideally, if you wanted to improve further, I would think your best bet would be to move the rear bolt of the upper arms higher or the front lower.

Be careful when doing this as you can actually end up going slower/having less traction.
 
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He did technically give you the info you want

If the upper arm is 10" long and the front bolt is a 1/2" higher than the rear bolt then the arm slopes up from rear to front at an angle of ~2.86 degrees.

(sin^-1(.5/10) = ~2.86 degrees)

If the lower arm is 19" long and the front bolt is 1.25" higher than the rear bolt then the arm slopes up from rear to front at an angle of ~3.77 degrees.

(sin^-1(1.25/18) = ~3.77 degrees)

From there you can find the IC and such. Given that the upper arm slopes up, your IC must be pretty far forward like you have said.

Yes it is, but this is with the front of the uppers lower an inch and a half from before. So it is significantly improved. You seem pretty educated about this so I'll ask you...lowering the rear of the lowers will move the IC further back which should also help right? Only downside is it will still be kinda high...
I wouldn't say educated but I sort of understand the idea.

Yes, moving the front of the uppers down should have moved the IC back some. However, I believe the upper should be pointing down if possible.

Moving the rear bolt of the lowers down will both move the IC back as well as up.

Ideally, if you wanted to improve further, I would think your best bet would be to move the rear bolt of the upper arms higher or the front lower.

Be careful when doing this as you can actually end up going slower/having less traction.
Maybe I'll leave it alone...I really like how it is now. I don't race sI this is okay for a street car
 
He did technically give you the info you want

The reason I asked is because if you put the numbers he listed the I don't see how the IC would be just behind the front bumper as he posted..

graph-stock.jpg
 
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