the scales. positive Bite and positive Wedge Delta. For a car with a 17.5-inch lower control arm length and a ball joint-to-spring mount distance of 2.5 inches, you divide 17.5 by 15 (17.5-2.5) to get 1.1667 and then multiply that by itself to get 1.3611. looking forward to getting it back! Thanks; what you say makes sense, of course, but repeatability is always going to difficult unless you can get rid of most of the bind, right? . Now, I didn't have the sway bars disconnected, not did I put anything slippery between the tires and the scales - I just wanted to get a quick look at the total weight of my car, but the amount of error caused by all the friction was pretty startling. Full of fuel, everything done, full of oil, lead bolted down. it would help the car turn left and accelerate better. Most people find this out pretty quickly. Iretighten them after I've made all my adjustments. as Left Rear Bite + Right Front Bite. 2) Stagger: Stagger is how much bigger the right side tires are compared to the left side tires. calipers. To properly corner weight the car, it is necessary to add weight to the drivers seat which is approximately equal to the weight of the driver (or have the driver sit in the car). February 2017 -Suspension design process. You should also complete this process with approximately the amount of gas with which you will be racing. It still pays to be thoughtful about weight placement fore and aft in your car. I don't like the lower weight ratings and plastic scale pads of proform. The left weight percentage is found by adding the LF weight to the LR weight and dividing the sum by the total weight. weights and percentages and generates target wheel weights to achieve a 50%
Measure control arm angles after each change. In April 2013 I corner balanced the S for the first time in
For pure race cars this isnt a consideration.
Tire stagger | Bob's 4 Cycle Karting I primarily just making sure it meets class mininum weight, but I may mess with the balance if its off by much, but I dont think it is. The "Corner Weight" (virtual scales) now determines the ride height and/or corner weigh . Then there is what I do for FWD stuff That is forget the rear weights entirely, and just balance the fronts to be equal. I vary mine alot depending on conditions, so should I sayset them where I would at the beginning of an average day for autoX? If you don't want to change your ride height then a more balanced approach would
Calculate the spring rate multiples.
[Up] [HarnessInstall] [WingInstall] [RemoveA/C] [OilCooler] [FireSuppress] [CutoffSwitch] [RaceExhaust] [Differential] [CornerBalance] [CatchCan] [RollCenters] [FrontBumpSteer] [Alignment] [ShockTuning] [Aerodynamics] [CatRemove]. If you are using scales as a base, level the scales with a long level, a long straight piece of tubing, square or round with a smaller level, or better yet, an instrument level such as a construction level. A stiffer spring on one corner equals more weight transfer to that corner. Plus it sounds like street and autocross pressures are about the same stagger front to rear, so it really shouldn't have a noteworthy impact. coil over 5 turns. 12.
2 1/2 turns. Heres a. setup for a weekly show: 1. how and why to corner balance a car.
Setting Up Your Traxxas Slash | Traxxas want balanced turning in both directions. When I first lowered it onto the scales, its total weight wasin the low 2600 lb range, which is way too light, considering the car's stock curb weight is 3086, and I took less than 250 lb out of it.
How To Set Up Your Car for Oval Track Racing - RacingJunk News There's Nothing In Racing Simpler-or Harder-Than Driving a Sprint Car You could also raise the left front or right rear ride heights to do the same thing. Note your ride heights and
It is possible that their circuitry uses a high capacitance value to smooth out the signal or slow it down. preload (extending the shock) to the Left Front, and one positive turn to the Right Front. Rear weight percentage for road racing and autocrossing is less definite. I use 2x6 wood planks as ramps to drive the car onto
I race in a spec class, so everyone is using the same equipment. If the person reduces the force with which he's pressing against the ceiling, the weight read by the scales will decrease. Once the ride has been set, it's a simple operation to bring the corner weights to the predetermined values. Taking the time and making the effort always pay dividends. If you had a car with a fully rod-ended out suspension that frictionless and frictionless tires you wouldn't need to roll the car around or bounce it or anything. If you want to lower the rear of the car then retract the LR
another.
RC Dirt Oval Car Setup & Tuning Guide [5 Key Steps] The driver is optional based on No. In any case, only make one spring change at a time and re-establish the ride height at that corner, then change the other spring(s). suspension changes to track your progress. But this doesn't explain why the Vette's readings came in so well, while I had to jump up and down on my door sills quite a bit before my car's weight stabilized at its expected value. Here is the method to correct the corner weights and set the left rear bite or cross weight. Since oval
All rights reserved. April 2017 -Bracketing settings, 4WD high speed pavement vehicle.
Weight Distribution Theory | Bob's 4 Cycle Karting see on the right side of the spreadsheet's "Target Corner Weights" section that
If the car understeers or oversteers in only one direction, check the cross-weight percentage. of its weight on the Left Front and Right Rear tires, and 50% on the Right Front
pounds of preload to the scale weights. Mudboss Setup #3 - Traxxas Slash transmission setup and diff oil for oval racing Oval RC 216K subscribers Subscribe 812 Share 51K views 2 years ago #diff #setup #mudboss Traxxas Slash. Because karts have so much caster having the steering turned even slightly will cause a big change in the corner weights. First off, you must maintain the legal ride height to pass tech. Carry some in your tool kit and buy tarus wheel studs if you want a dirt cheap slightly longer wheel stud to have more safety. Then the car will move more easily from one setting to another. are favoring the left rear tire for better acceleration out of left
"two linoleum tiles & salt" technique to allow the tires to slide on the scales
1 of the section on "Adjusting The Corner Weights," and that is 685. This will pitch the vehicle's. To favor right turns, put more weight on the
Changing the amount of weight on each corner will change how the kart handles in a turn. shocks set to same length left to right (front to rear will be different). Disconnect the sway bar. Since I went to 800 front and 700lb rear springs over the winter I
In my situation, I have a lift, and I'd like to simply drop my car onto the scales, but it seems like that's the worst option as far as removing friction and bind. Front + Left Rear) - (Left Front + Right Rear) and tells us how much
cross weight - iRacing.com Wiki Dirt track racing - Wikipedia This is the arm length divided by the distance from the shock mount to the inner pivot line, squared. (corner weights) instead of moving shims above / below spindle? We run an extremely high banked 1/5 mile clay oval in Alabama that is always wet and low bite. A perfectly corner balanced car will handle the same when turning left and right, and will maximize the tire contact area on all four corners. 50% then Wedge Delta will be 0. If a setup sheet read as "30 pounds of bite", there would be 30 pounds more weight on the left-rear than the right-rear. The salt acts as tiny ball bearings and will allow the tires to
If you get the car neutral in left turns, it oversteers in right turns. The Circle Track Analyzer is a computer program that simulates most any car you can design, racing on most any size oval track. intentionally favor a turn direction. Jun 7, 2018 #8 . If the driver lifts early but still has a fairly good amount of roll speed into the corner, there probably isn't much brake being used. In the example at the beginning of the article, this was the problem: a cross-weight percentage that was less than 50 percent, and probably off by at least two percent.
Corner weights-cross weights - TenTenths Motorsport Forum You cannot change the left or rear percentages by jacking weight around in the car, although this will change cross-weight. I used a laser level to project a horizontal
Bearings, like sealed roller bearings,solid bushings, or spherical joints. Road racers can take a page out of the oval racing book and
Right Rear. Cross weight and left side work backwards in terms of adjustment. springs to put more weight on the left rear (and right front) tires and
Same with go-karts with solid rear axles, they'll lift. If you raise the ride height at a given corner (put a turn in or add a round of wedge), the weight on that corner will increase, as will the weight on the diagonally opposite corner. Upgrade fluid and/or cool. 14. [ 1] In circle track racing, the use of the term "crossweight" gives us an indication of the weight distribution on the four tires.
Comet Kart Sales - Karting 101 - Getting Started in Kart Racing Check static weight before working on cross-weight. Prepare the car. You will need to weight your vehicle on each tire to use this tool. If you want to lower the ride height then retract both RF and
need to roll the car back and forth a few inches several times, being careful
If you moved only one point, then the problems begin. I had the same question. That is why a stiffer right rear spring makes the car looser. Granted, moment centers will stay fairly consistent with small movements of the chassis in dive and roll from the ride heights being off a little.