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Author Topic:   The basics
0LT
Dirt Full Roller

Total posts: 38
posted February 25, 2005 08:49 PM  
Assume your race car has a very neutral setup that is easy to drive and has decent forward bite. Assume also that your percentages are close to where you think they should be (at least what everyone tells you they should be).
What happens (in theory) when you start adjusting weight jacks? What I mean is if you crank 3 turns out of the right front will it get looser or tighter? 2 turns in the right rear? Get my drift?
Also assume that every time you make a change you then set it back to the baseline setting before you make the next change.
The reason I ask is sometimes we don't get the chance to change shocks or springs because our local track usually runs a very fast program and it limits our pit work to fuel, tires, and tearoffs. I don't have a large pit crew (me and my wife) so I would like to know a few of the "basics" when it comes to being able to crank a few turns either way. We did well last year winning two features (one on dirt, one on asphalt) without doing any changes other then tire pressure between the heats and mains, but this year the competition will increase ten-fold and I would like to use anything I can to get to the front.
Thanks in advance,
LT

AtomicPunk
Dirt Maniac

Total posts: 130
posted February 25, 2005 09:55 PM  
The easiest way to chack that is on a set of scales. If you don't have any, ask around. Probably someone you know has a set. I'll ask my set-up guy, he A LOT sharper on this than I am.

LMS53
Dirt Roller

Total posts: 21
posted February 26, 2005 08:48 AM  
THINK OF THE CAR IN AN "X" WHATEVER YOU DO TO THE RIGHT FRONT YOU CAN DO TO THE LEFT REAR TO GET BASICLY THE SAME RESULTS VISEAVERSA ON THE OTHER SIDE LF.RR. IF YOU TAKE 3 ROUNDS OUT OF THE RF. THAT SHOULD LOOSEN THE CAR. IF YOU PUT 2 ROUNDS IN THE RR THAT WILL LOOSEN THE CAR ALSO. IF YOU CAN PUT THE CAR ON SCALES AND TRY THIS TO GET A BETTER UNDERSTANDING OF HOW IT WORKS WOULD BE GREAT. HOPE THIS HELPS

Donald g man
Dirt Roller

Total posts: 14
posted February 26, 2005 09:51 AM  
Going with the "x" you can take it a step further, (in your mind's eye) weld two pieces of 3/4" square tubing by 20" in a flat x, then at the end of each leg drill a hole and weld a nut into the hole. Are you with me? Now fit four bolts into those holes and lay the "x" flat on the work bench screwing each bolt down until all four bolts touch without any teetering. As you screw down on any one of the bolts the "x" will now be supported by only two bolts. The diagonal direction of that support will be the same direction foward movement will tend to want to steer. That being said, in a car that carries more weight on the right front and left rear expect a push or movement to the right. When you change the weight of the car to the other side of the "x", left front to right rear, the movement will tend toward the left or loose. This is basic circle track setup and I hope I haven't oversimpified it for you.

    

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