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Old 02-26-2008, 06:49 AM
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Weighing for CG

Say I had two trucks both the same style one was dropped 5" and the other one stock height, and I used the stock height one to set up the CG on the dropped one, would that be accurate? I am talking about just the weight, not the actual height I can figure that stuff out on paper, but I need to weigh it and this is eht only one I can weigh currently.
I still plan to put adjustable brackets on the front of the link bars, but I wanted to get it close before hand. Or does the height of the vehicle drastically change the way the weight is disbursed?

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Old 02-26-2008, 10:17 AM
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As long as everything else is identical, dropping the vehicle 5" evenly at all 4 corners will alter its CG, but only in the Y axis. You will have to recalculate for the height change, as long as you haven't raised or lowered either end of the vehicle separately. Just compensate for the centroid of mass.
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Old 02-26-2008, 10:19 AM
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Heighth won't change for-aft weight distribution much. Lowering the front will put a little more on the front axle, but not an appreciable amount.
That said, lowering will have a definte effect on the center of gravity of the vehicle. That is too complicated to go into in a short post. I didnt search it but perhaps there is a tech post about it. There are several very good publications about defining and determining CG and roll center out. For a rod chassis, Tex Smiths' How to Build A Hot Rod Chassis, is very good.
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Old 02-26-2008, 11:03 AM
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There were quite a number of posts here on that subject quite a while back..Try a search and see if some of them come up..

Like the others I do not think the Cg will shift all that much from truck to truck..

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Old 02-26-2008, 11:17 AM
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I know the CG height and stuff will change I just want to make sure the weight will weigh the same being that the truck is higher up, like when I do the lifted front end to get the rear weight I just wanted to make sure the weight technically was the same, but it seems from a couple post on here and another forum it will be fine. The heights and such are being determined so it's not a big deal. Thanks guys!
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