Corner weighting is huge. The front will show close to 60%. Then if it's for a particular road course, you will find several seconds optimizing for select turns and throwing any of the above methods out the window... A friend's Chump Car found 2 sec at VIR making it turn right better than left. - The distance from the ground to an inner suspension arm pivot point will also accomplish the above goal. Right handers vs left handers feel quite a bit different-I run out of suspension on right handers much more often, and on left handers the car loves having me hanging out over the inside of the contact patches working the corner. Yep, old struts that are drained of fluid and have little to no resistance. 3 0 obj The car should be at minimum weight, using ballast as needed to make the proper weight. For pure race cars this isn’t a consideration. Funny. }); Static weight distribution is the weight resting on each tire contact patch with the car at rest, exactly the way it will be raced. I have now added the ratios so I can visually see what's happening. I've read all the info before, in various places, but it's good to have a refresher. It was a good car. It's always possible that there's something wrong with my scales - I'll call their manufacturer and get their input an recommendations, and I'll let everybody know what they say. Rock or bounce the car helps.

###Setting Static Weight Distribution: - Check static weight before working on cross-weight. >> Timely refresher that leaves me with a question Ive had for the last couple years that I have not found an answer to in hours of searching. For street cars it certainly can be. competition. car. These tell us all we need to know about the setup relative to the weight distribution. /Font << Equal weight on each front wheel, same on the rear. Then there is what I do for FWD stuff... That is forget the rear weights entirely, and just balance the fronts to be equal. - Disconnect the shocks, when possible, and the anti-roll bars. - You cannot change the left or rear percentages by jacking weight around in the car, although this will change cross-weight. Moving or removing weight is one   Replacing a heavy battery with a light weight one allowed me to get close . Since this article still gets a bunch of traffic, just bumping it up.

/Type /Pages �3ʵ֋7��0��!�yL2xƾ�?=}�ξk5=��K�8�����ui��hƥ�tQ�=�H,�gR��ყ����{���ϝIH���c�E��B���{s�!�٢�2���ᇷ�������������������7��Ua^%A\��A�,c�;�R"(��bI2��;,��k��!���z7��&���ӧ�����UQfo>��/=/;��JL�L���j���d�4zl�e�X@OeJ1�)�p�8�>��$�r�� �C�]���Ԏ T�a⁊e�G��/6���b��C�$�T5}���vg�njI7���s(W��Ua�9_CS�B����@��,�(� �B}�����_�y9Ɲ����k|� v0I�����Rgf�>1�FI9�_N@Ia�p�e. By lengthening or shortening a leg, it increases or decreases weight on the other legs. << I'm anxious to see what Proform says about my experience. Do these percentages apply for front wheel drive cars?

- Always record the cross-weights and ride heights for reference at the race track in case changes are needed. By David S. Wallens

endobj New A-ARM Front End - Stronger and Easier to Setup New Arc Mount for Lower Control Link HOME / PARTS / RACE ENGINES / WHATS NEW / FOR SALE / CAR PRICES / CONTACT US / WINNERS PHONE (740) 455-3338 FAX (740) 454-6942 2 7 7 5 N O R T H L I N D E N A V E Z A N E S V I L L E , O H 4 3 7 0 1 You’re always going to have some friction, especially depending on the type of suspension used. One of the most important aspects of car setup is the static weight distribution and the cross-weight percentage. This was a very interesting post to me. Ah, OK, thanks for the clarification. This setup guide also has new information based on the changes that go along with the new version of the sim.

But stagger is not a good idea on a road course or autocross either, where the ideal is 50-percent cross-weight and no stagger. - It is best to get 50 percent left-side weight when possible. It still pays to be thoughtful about weight placement fore and aft in your car. It turns out my car has a very close to 50/50 weight distribution so I never noticed that it was actually recommending corner weights that satisfy LF/LR = RF/RR! Cross-weight percentage compares the diagonal weight totals to the car's total weight. var contact = "Contact Us" One of the keys to obtaining a good setup is using the correct procedure to weigh your race car. Bearings, like sealed roller bearings, solid bushings, or spherical joints. You’ll see every article as soon as it's published, and get access to our full digital archive, by subscribing to Grassroots Motorsports. /F6 18 0 R While several different setup parameters could have caused this situation, a likely cause is excessive cross-weight. The angles are another way to set the suspension for the desired ride height and cross-weight percentage. I didn't  hunt for that missing 1 %. This guide covers much of the basics for the less experienced sim racer as well as a troubleshooting section that should help reduce your lap times. Thanks. Interested in hearing peoples' opinions and (preferably) experiences. Here is a synopsis of how camber effects the handling of the chassis: Here are the diameter choices of the bar: The grill tape option is located under the drivetrain/aero tab within the garage menu. /F4 15 0 R

- Get the rear percentage as close to the manufacturer's specs as possible. | Posted in Or it could also be possible that the signal is smoothed in the programming. /MediaBox [ 0 0 612 792 ]

Did you mean it was off several hundred pounds per corner? I put the car on grease tiles so the tires move freely on the scales and then I bounce each end a couple times. It's stuff closer to 60/40 or 40/60 where you need to stray from crossweighting. Here are some points to remember when weighing your race car: - Make sure the floor is perfectly level; use shims under the scale pads if needed. Thanks for posting this.

/F1 11 0 R - Use a load of fuel for where you you want the car balanced, either at the start of the race, the end of the race or an average between the two.

/Pages 2 0 R

On a road course, the cross-weight percentage should be very close to 50 percent, within a half-degree either way, to keep the handling balance similar in a right-hand turn compared to a left-hand turn. RacelineCentral.com All Rights Reserved, NASCAR 2K3 Racing Season Garage 101 Guide Download, Creative Commons Attribution-Noncommercial-No Derivative Works 2.5. - To increase rear weight, move weight as far back as possible. /F3 14 0 R If you shocks are working normally they are not worth worrying about.

/Contents 5 0 R Taking the time and making the effort always pay dividends. Wouldn't the fact that it is front wheel drive change at least the front to rear percentages? {z����7�VC~}��p��N��[� e��% The car literally registered several hundred pounds less that what the weight finally settled at after I jumped up and down on the door sills for several minutes. Get the numbers right and the percentages will follow. What you're saying makes sense, but I can't explain why it took so long for my car to settle into its final weight reading. More stagger usually loosens the handling in left turns, so more cross-weight is used to tighten it up.

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It has to, it's just the laws of physics. My car is a 1987 Honda CRX, set up according to ITC class rules. This means the driver should be in the car, all fluids topped up, and the fuel load should be such that the car makes your minimum weight rule at the designated time-usually after a race. Click to download and print or fill in form and save. Caster Master Setup. I don’t get this. The "ULTIMATE" Racing Car Chassis Setup Guide and Tutorial. ###Setting Cross-weight: - Once static weight percentages are set, work on cross-weight percentages. I found that the tire will absorb side loads quite well and was repeatable. Setup Sheets. /XObject << That seem like a lot. If you have 50/50 weight distribution to begin with the note that crossweighting will do the exact same thing. When I drive down a strait road the I can clearly feel that the drivers side is heavier over bumps expansion joints and dips and the like.

I don't like the lower weight ratings and plastic scale pads of proform. I also was involved with beta testing for NASCAR Racing Simulation Games.

At the time Honda was still favoring their home market I reckon. All rights reserved.

This tape If we are talking of weighing a stock type vehicle, not a lot can be done since there are no adjustable parts. Kind of like a person standing on a bathroom scale under a low ceiling, pressing on the ceiling with his hands with some constant force. - Put the driver weight in the car, preferably the driver. If you get the car neutral in left turns, it oversteers in right turns. endobj For dual a-arm solutions, dead shocks can be used with springs and they can be built with much less bind out of the box.

When working with static weight distribution, we use two percentages to analyze the car's corner weights: Left weight percentage and rear weight percentage. /Count 2 /ProcSet [ /PDF /Text /ImageB /ImageC /ImageI ] - The only way to change static weight is to physically move weight or ballast in the car.

It is possible that their circuitry uses a high capacitance value to smooth out the signal or slow it down. - Remember that changes in stagger, tire pressures and springs will change the ride height and alter the cross-weight percentage. Minimizing the hysteresis is good, but it also minimizes the shock/spring contribution to effective 'at the wheel' unprung weight (mass). The other two corners will lose weight. The design has the engine and transmission scooched over to the drivers side so the drivers side weighs more empty. >> My personal motto in chassis setup is to ^Hook up the rear, then make her steer. %���� Shown above is a gaming expo fair in Europe that held a contest for the best gamer team in a newly released 1st shooter game In the above example, to go from 52 percent to 50 percent cross-weight, try lowering the right front and the left rear one-half turn on the weight jack bolt or spring perch while raising the left front and right rear the same amount. "ULTIMATE" Racing Car Chassis Setup Guide and Tutorial.

Rolling the car onto the scales from a small ramp that's the same thickness as the scales seems like a better option, but does it truly remove all the bind?

5 0 obj /Length 6 0 R You would be amazed at how much bushing twist can contribute on your suspension.

Picture the following: Your car is really fast in right-hand turns, but understeers in left turns.

the force of air.

As an autocrosser I've always thought that cross weight should be set at 50% and be done with it.

More wedge means that the car will likely understeer more in a left turn. It varies with weight removal, added. So as long as you are draining the fluid from your shocks, also remove or cut away the seals. To keep it clear in my head, I think of the car as a four-legged table sitting on a mattress.

Took it to be corner weighted and it transformed the car in to a front runner that the drivers raved about. I see disconnecting the sway bar, and how to do it, but disconnect the shocks? >> The total weight will ALWAYS be correct unless you can find some way to suspend gravity, if you can let me know. >> Besides the eventual move to an adjustable ride height set up,  I feel like I need 100 lbs or so more spring in the left front. The only component were worried about is Would be interesting to see how close to ideal I got it though, given how well it handles already. Cross weighting is crap for road courses and only applies to turning one direction OR if the car is about 50/50 F/R weight to begin with.

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