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Old 02-27-2009, 09:23 PM
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MII Pre alignment?

I want to pre align my MII front end.. I have all stock components on an aftermarket crossmember kit.
Am I suposed to keep the upper A arm bolts parrellel to the centerline of the car or is this how the o* is achieved when setting caster?

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Old 02-27-2009, 10:13 PM
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I have to tell you something, you really should know that the degree of angle the upper control arm shafts are at on a stock Mustang or something as a starting point. Then put it in your frame using that as a guide line.

Brian
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Old 02-27-2009, 11:12 PM
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Quote:
Originally Posted by Cape Cod Bob
I want to pre align my MII front end.. I have all stock components on an aftermarket crossmember kit.
Am I suposed to keep the upper A arm bolts parrellel to the centerline of the car or is this how the o* is achieved when setting caster?
Them bolts aren't always parallel with centerline.That's why the top holes are slotted. Hope this helps you.
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Old 02-28-2009, 09:00 PM
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Here is what I do for a pre-alignment. This will be close for the initial test drive until you can do a proper alignment.

Make sure the lower control arm is installed snug and the strut is fully tight if you have one on your car.

Start with the rear adjuster on the upper control arms. Loosen the nut and move the upper a-arm inboard until the edge of the shaft is even with the inner end of the slot on the frame and snug down the nut. You should still be able to move it more inboard later if necessary.

Set the car at ride height, and put a level vertically on the tire/wheel. Move the forward adjustment on the upper a-arm until the wheel is vertical at ride height to slightly in at the top. You will have to jack up the car and take the weight off the wheel to do this. Jack up the car, make the adjustment and then set it down to recheck. Do both sides the same.

Once all that is good, set the toe to about 1/8" in. Make certain the tie rods are the same length to start with, then set the toe. The easiest way to do this is to set a 2x4 against each tire with the car at ride height. Block up the 2x4's about 4" or so to get them past the bulge in the tire. Measure across the back of the tire to the 2x4 on the other side and get the dimension. Do the same across the fronts of the tires and subtract that dimension from the rear number. Adjust it until the number on the leading edge of the tire is 1/8" smaller than the trailing edge.

Tighten all the front end components at that point with the car sitting at ride height, and you will be ready for the test drive.

Andy
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Old 02-28-2009, 09:07 PM
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The reason I suggested to check the degree of the upper control arm shafts is even though there is adjustement using the sloted holes, if you put it any where you want you could end up with not enough slot to get the proper caster. I have seen it, he had to get offset shafts to align the car.

Raising or lowering the rear can change things quite a bit as well.

Brian
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Old 02-28-2009, 09:23 PM
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Quote:
Originally Posted by MARTINSR
The reason I suggested to check the degree of the upper control arm shafts is even though there is adjustement using the sloted holes, if you put it any where you want you could end up with not enough slot to get the proper caster. I have seen it, he had to get offset shafts to align the car.

Raising or lowering the rear can change things quite a bit as well.

Brian
If the crossmember and upper spring mounts are intalled properly, he should have no trouble getting 2.5 to 3 degrees positive caster when completed.
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Old 02-28-2009, 10:12 PM
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You can very easily set everything,Everything can be set before you even put the tire on it.But as I see it here,Everybody has a answer, so good luck,I'm done here.
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