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Old 08-09-2013, 08:58 AM   #1
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Questions?? question about chassis setup

Hey all, I was setting the ride height on my touring car chassis. I was wondering if it is necessary to set the collars on the threaded shocks to the same distance from the top of the shock. I can get the distance close, but there is always one that is either lower or higher than the others. When this happens, should I add or take away weight to the corner with the odd space? Thanks for any and all input
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Old 08-09-2013, 09:07 AM   #2
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Do your best to balance the car left to right.

Remove shocks and ensure free movement of components.

Begin with collars equal left to right then mark the collar with a marker

Set ride height front and rear.

Place center of car on table edge transverse.

Lift the 1/2 of the chassis that is off the table until the opposite end compresses.

Watch for equal compression left to right.

Adjust collars to attain equal compression.

Done
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Old 08-09-2013, 09:35 AM   #3
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Quote:
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Do your best to balance the car left to right.

Place center of car on table edge transverse.

Lift the 1/2 of the chassis that is off the table until the opposite end compresses.

Watch for equal compression left to right.

Adjust collars to attain equal compression.

Done
I am not sure what you mean about "place center of car on table transverse. Are you talking about front on table back off, left off table right on?
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Old 08-09-2013, 09:39 AM   #4
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Another way of saying place the car on the edge of the table, with either both fronts or both rears off the table. You're using the edge of the table as the pivot point. Lower the side that is hanging off the table, and watch to see if both tires lift off the table at the same time.
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Old 08-09-2013, 10:11 AM   #5
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would I need to remove the sway bars as I do the balance?
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Old 08-09-2013, 10:14 AM   #6
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No you want to check the tweak with everything ready to run.
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Old 08-09-2013, 10:17 AM   #7
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Quote:
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Another way of saying place the car on the edge of the table, with either both fronts or both rears off the table. You're using the edge of the table as the pivot point. Lower the side that is hanging off the table, and watch to see if both tires lift off the table at the same time.
That's more checking that the droop is equal, but there are more precise ways of doing that.
The compression being equal is what is usually checked by this method.

With the rear wheels only on the table, front tires off the table (chassis 90 degrees to the edge of the table), lift the front of the car straight up from the very center and watch how the rear compresses. If one side drops quicker than the other, add a bit of preload to that side and remove a little from the other. Keep doing that until the car compresses equally. Then turn the car around and check the front.

Get the car left/right weight balanced before doing any of this.

If you hear someone say "square up the car" they are usually referring to this method of making sure the shocks compress equally.
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Old 08-09-2013, 10:25 AM   #8
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I have the droop set, using a droop gauge.

I will check out how the rear and front tires drop using this method and let you know how it turns out. thanks
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Old 08-09-2013, 10:33 AM   #9
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I've also seen that your downstops have to be equal left to right because that will have a huge impact on how much uptravel the car will have. If they're my equal l/r, one side will require a lot more spring preload than the other.
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Old 08-09-2013, 11:44 AM   #10
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The preload distance on the shocks is irrelevant if its minor. Springs arent always perfectly matched, although it can be a good clue if its off significantly. It os possible for the preloads to be out of whack yet the ride height be equal left to right at both ends. That would require attention for sure
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Old 10-05-2013, 09:37 AM   #11
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I was never able to get the shock collars even, just very close. I also tried the gram scale method with 4 gram scales. Left to Right and Front to Rear the car is very close in weight. The droop and down stops are also very close if not perfect. When all is said and done, I ran the car on carpet and it hooked up beautifully, I think I have it as close to right on as possible. Thanks, I learned allot from your posts
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