scaled the car tonight finally
scaled the car tonight finally So this is my first time scaling a car and im not 100% what or how to look at the readings. This is my 4th gen camaro with a turbo ls in it and me in it so true 100% race weight. Front end is pretty close to each side but the rear is way off for some reason. Only thing on that side is me obviously and my fuel pump. I never did set preload on my anti-roll bar so could that be holding the rearend from equaling out? Im not too sure on how to set the anti roll bar so maybe start there?
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From: Turnin' Wrenches Infractions: 005
Ive always been told set it neutral then lengthen the passenger side one turn to preload. If you don't do it enough the car will still lift the driver tire more, if you do it too much mine starting pulling left on acceleration, and I think I've got it about right now finally. Seems to be a small window to get it right, either that or I just don't know what the hell Im doing 
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To set the ARB you need the driver in the seat. Jack the front of the car up in the middle with something narrow on the jack, just till the tires are barely off the ground. (They can't be touching the ground.) Floor needs to be very flat. Measure from the corner of the door jam to the floor. The pass side needs to be a sixteenth of an inch higher. Adjust ARB to achieve this. That's how you start off. Then when you are at the track. If the car goes slightly right. Extend the pass. side a little. if it goes left shorten the pass. side. Only the pass. side is adj. after initial set up.
You do not use the anti roll bar to set preload. With the car on the scales with the driver in it disconnect the anti roll on the passenger side. Run the drivers spring up at least a 1/2" higher than the passenger side. You are looking for 10 lbs more weight on the passenger rear over the driver. The car should sit level side to side. Then hook the anti roll up neutral.
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You do not use the anti roll bar to set preload. With the car on the scales with the driver in it disconnect the anti roll on the passenger side. Run the drivers spring up at least a 1/2" higher than the passenger side. You are looking for 10 lbs more weight on the passenger rear over the driver. The car should sit level side to side. Then hook the anti roll up neutral.
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You do not use the anti roll bar to set preload. With the car on the scales with the driver in it disconnect the anti roll on the passenger side. Run the drivers spring up at least a 1/2" higher than the passenger side. You are looking for 10 lbs more weight on the passenger rear over the driver. The car should sit level side to side. Then hook the anti roll up neutral.
Never said anything about setting shock preload. My statement was strictly for the ARB. It was for after the shocks were set and car was level. My bad since I didn't state this. Several posts stated they were not sure how to set the ARB. Every car I have done like this, goes straight as an arrow. And I learned it from Pro's.
Thats about the only way.
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We always move stuff around in the car to get the weights rite. Try not to add any weight, and don't change even preloads on the coil overs. If you add that much preload to the left front. What happens during the launch and the weight transfers to the rear? By setting the ARB with all four on the ground and all that preload on the left front. When the weight is transferred to the rear. Won't the car go lite again on the right rear? Thus pulling harder on the ARB on the right side and making it go right? Then at the big end, wouldn't that uneven preload cause the car to push right? Not trying to argue. Just trying to understand your way of doing things. I love all information. Any is always appreciated. Thanks
By running the driver front spring up you are compensating for the driver weight. By using the ARB for preload you are binding the chassis up. Thats when the car will try to dart upon lifting and braking.
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The only preload is 1/16th of an inch on the chassis. That's one landing on a hex turnbuckle. Just enough to compensate for the torque and flex. I was told this method years ago. And it has worked perfect every time. We put our preload on our coilovers to be the same in the front side to side, and the same side to side in the rear. Was told never to preload coilovers like that. If the wheels are off the ground during the launch, how is the weight staying applied to the right rear? Sorry but that makes no sense. And would that not be putting a twist in the chassis because there is 79lbs more pressure being applied in one corner? Sorry, I guess I just don't understand.
If the car goes straight and handles fine so be it... do what you do. There are other methods and do in fact use ARB preload... it is proven and working today. There are many ways to do things, not saying one is right and others are wrong. If the goal is achieved then carry on.
How many ways to skin a cat 
MWC and MADMAN both have very solid history and TRACK PROVEN results. They might not agree on everything but they both know what they are doing in their own ways.
Carry on with the tech for us ignorant folk.
MWC and MADMAN both have very solid history and TRACK PROVEN results. They might not agree on everything but they both know what they are doing in their own ways.
Carry on with the tech for us ignorant folk.