In general, more Ballast Forward is going to make the car tighter on entry and possibly a little looser on exit. This condition can be corrected with practice most of the time, but if it’s too severe you may need to move some ballast forward. I think some of that may be caused by having too much ballast in the back of the car. A lot of people have an issue where the car wants to turn right when exiting the corner or at some point when it should be going pretty much straight. If the front end of the car feels light and your steering inputs don’t seem to be working right, you might need to move more ballast to the front of the car. Moving the ballast forward or back changes the balance of the car and how it reacts in cornering. I think iRacing uses the term Ballast Forward because it’s measured by how far forward the ballast is from the center of the chassis. Too much angle can stop the chassis from rolling.īallast is usually made up of lead blocks or some sort of moveable lead. In theory at least, increasing the angle, or J-Bar rake, should tighten the car any time it’s up on the bars. This is commonly referred to as J-Bar rake. More J-Bar angle (lower on the axle and/or higher on the chassis) pushes the left rear harder into the track surface and reduces the sliding action of the rear tires.Higher J-Bar (both ends) = less chassis roll = looser.Lower J-Bar (both ends) = more chassis roll = tighter. ![]() The end result is that you shift the weight to the right rear sooner. If you lower the J-Bar on the axle only, adding more angle, the car will get “up on the bar” more quickly. That shifts dynamic weight to the right rear. The J-Bar raises the left rear of the car under acceleration. I usually find it’s okay to lift briefly on entry as is shown in the video. That means you need to stay in the throttle, at least partially, just about all the time. You really want to keep the car up on the bar as much as possible. Notice that the car drops off the bar very briefly on entry when the driver lifts. It doesn’t take full throttle to get the car up on the bar, but it does vary by the amount of throttle applied. This video shows how the car gets “up on the bar” under acceleration. It’s the black J-shaped bar under the yellow coil spring. You can see the J-Bar in the video a little better at full screen. The video below is really good, but I still don’t quite comprehend how the J-Bar, sometimes called the Panhard Bar, actually works with respect to the handling of the car. This is probably the hardest thing for me to understand on these cars. One of the purposes of the J-Bar is to hold the rear axle in place laterally, or to keep the rear axle from moving from side to side. ![]() I still don’t understand some of it, and some of it may be wrong, but it’s what I’ve managed to pick up here and there about a few of the adjustments and what they do to the cars. With this post I’ll try to convey some of the things I have learned about the Dirt Late Model cars. Some things are similar, and some things are actually 180° out of phase. I quickly found out that setting up an asphalt car isn’t anything like setting up a dirt car. When dirt was released, I made the move because I love dirt racing. “It’s a tough trip for the birds either way so the last thing they need to do is encounter brightly lit buildings,” notes Peck.After four years on iRacing, I have a fairly good understanding of iRacing’s version of most of the short track asphalt cars. Up to one billion birds die each year when they collide with human structures, according to a news release from “Lights Out Philly.” The first bird death from a collision in Philadelphia was recorded in the 1890s, when the Academy of Natural Sciences started collecting “window kills.” ![]() The effort to lower light pollution is also underway in 33 other US cities, but sadly it will hardly solve the peril faced by airborne fowl. “The ground was sprinkled with dead and dying birds,” he said. Their deceased bodies “littering the sidewalks in downtown Philadelphia,” said Peck. One catalyst for this year’s effort was a mass collision event on October 2 of last year when thousands of birds perished after striking buildings in the city. ![]() Up to 1,500 birds may have flown into Philadelphia skyscrapers - in a single day (Photo by Bruce Bennett/Getty Images) Bruce Bennett/Getty Images PHILADELPHIA, PA - APRIL 25: A general view of the Philadelphia city skyline prior to the game between the Philadelphia Flyers and the New York Rangers in Game Four of the First Round of the 2014 NHL Stanley Cup Playoffs at the Wells Fargo Center on Apin Philadelphia, Pennsylvania.
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