Corner Balancing Question, With a twist |
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Corner Balancing Question, With a twist |
ellisor3 |
Jan 16 2012, 04:32 PM
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#1
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HPWhore Group: Members Posts: 811 Joined: 23-October 08 From: Fleming Island, Florida Member No.: 9,683 Region Association: South East States |
I took my car to get it corner balanced, and all seem to work out pretty well. Then went to get the alignment and had some issues. I posted about that and got some really good feedback that will help me solve the problem.
Then today as I was looking at the situation again I noticed another problem. The ride height of my car is higher in the passengers rear than the drivers rear by 2.5 cm. I don't know how I or the shop that did the corner balancing missed it. Here are the numbers from the weighing LF 599 RF 541 =1140 LR 724 RR 678 =1402 Total weight 2542 Left side is 52% Right Side is 48% Cross weight is 50.23 To Correct the balancing, take the weight of the total of the front and multiply by the corner to be corrected: 1140x52%=593 for the LF 1140x48%=547 for the RF 1402x52%=729 for the LR and 1402x 48%=673 for the RR Corrected quadrants LF 592(-7) RF 547 (+7) LR 729 (+5) RR 673 (-5) Since I have steel flares, I measured the height from the floor to the lip of the flares and they are the same. I also checked the height setting on the shocks (Bilstein Sports) and they are equal to each other. What would make the car higher on one side? Could the sway bars cause this? It seems one option would be to raise the LR to not only equal the weight but correct the ride height. The only thing that puzzles me about that is that the shocks would be set in two different positions, is that normal?? |
PRS914-6 |
Jan 17 2012, 10:03 AM
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#2
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Excellence Magazine Project 914 3.6 Group: Retired Members Posts: 1,278 Joined: 20-May 06 From: Central California Member No.: 6,031 Region Association: None |
I highly recommend that you find a way to make the car "float" when you are aligning or corner balancing. Every time you jack up the car for an adjustment or make any adjustments at all it takes away the natural relaxed setting of the car and it does effect the balance significantly. If you notice, when you jack up the front of the car, the camber changes dramatically and when you set it down it stays that way until the car gets moved. This is bad, it effects height adjustment, alignment settings as well as corner balance.
The best way is to get some ball bearing alignment pads and set them on your scales. These allow the car to completely float on top of the scales. If you need to jack or adjust anything, the suspension and tires can move around freely. The ball bearing plates are nice as they are restricted to about 4" of movement preventing the car from sliding off the scales. I don't care for the 1 scale approach due to the variables and extra work. The "cheap way" is to get 8 pieces of sheet metal about 12" square. Grease between two sheets and install between the scales and tire. This allows the suspension to float. IF YOU DON'T LIMIT THE CAR TRAVEL IT WILL SLIDE RIDE OFF THE SCALES!!!! If you have adjustable shocks, set the damping to the lowest position while balancing Like Chris said....disconnect any sway bar. Re-assemble when done without any bind by adjusting the downlinks. After any adjustment give the bumpers a couple of pushes to "settle" the suspension Small adjustments and check. You will have to go back and forth between alignment and corner balance until things get pretty close as one effects the other. It's frustrating and time consuming. Dedicate a day your first time.....Don't forget to properly inflate the tires before starting. |
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