How is rear bite calculated?
Subtracting the amount of weight supported by the RR tire from the LR tire’s weight, we arrive at a number and call that the amount of bite in the car, i.e., “100 pounds of bite or left rear.”
How do you increase side bites in a dirt track car?
To give the car more lateral traction, go to a softer right rear bar or a stiffer right front spring. A stiffer left rear bar will have two effects: raising the car (higher CGH), and adding static left rear weight.
How do you soften a dirt track car?
Change rear spring rates. Softening the right rear spring, and/or stiffening the left rear spring will increase the rear roll angle and will tighten the car, as will softening both rear springs. The inverse is true, stiffening the RR spring and/or softening the LR spring will loosen the car.
How is load transfer calculated?
The longitudinal load transfer for each wheel can now be calculated using the following equations….
- WL = Static Mass on Left Wheel (kg)
- t = Track Width (m)
- W = Vehicle Total Mass (kg)
- Ay = Lateral Acceleration in G.
- h = Height of centre of gravity (m)
How does cross weight affect handling?
On oval track cars, cross-weight is usually used in conjunction with stagger (where the right rear tire is larger in circumference than the left rear tire) to balance handling. More stagger usually loosens the handling in left turns, so more cross-weight is used to tighten it up.
How do you increase side biting?
Another way to increase or decrease side bite is the anti squat adjustment in the rear of the car. Adding shims to the front of the block will increase anti-squat and give less side bite WHILE ON POWER. Anti-squat only works while you are on and off the gas initially.
What is wedge in a dirt late model?
Wedge is the offset balance within your tires of your car. These include the rear bite on a dirt track car, the wedge, the rear weight, the spring rate, the left weight, and the tracking of the wheels.
What does a tight race car mean?
understeer
Tight: Also known as “understeer.” A car is said to be tight if the front wheels lose traction before the rear wheels do. A tight race car doesn’t seem able to steer sharply enough through the turns. Instead, the front end continues toward the wall.
How much does it cost to build a dirt track car?
A brand-new, complete Late Model racecar will cost a racer approximately $34,000 without an engine. An engine to run IMCA races, as is most common in Eastern Iowa, will cost on average $20,000, Eckrich said.
What’s the average weight of a dirt stock car?
The trend in dirt racing seems to be leaning toward a left side weight percentage of around 53.5 to 55 and somewhere between 75 and 125 pounds of wedge. These numbers are just averages and are very dependent on the class of car and the tires being run. I have heard of many cars running well outside of these parameters and winning.
Where does the weight go on a dirt track car?
Since the chassis weight is sprung weight it is free to transfer throughout all four corners of the car. But, a very heavy concentration on the left side rear of the chassis won’t transfer as much to the right rear to give side bite on the way into the corner.
Which is the correct percentage for rear weight?
The rear weight percentage is found in a similar manner: Add the LR and the RR weight together and divide the sum by the total weight. Many electronic scales will perform the calculations for you. For road racing and autocrossing, the ideal left weight percentage is 50 percent.
What’s the left rear axle weight on a dirt car?
The hottest thing in dirt racing lately is the increase in left rear axle weight on four link race cars. What are the plusses and minuses? Hogan Technologies
