12… 13 pounds of pressure is not unusual at all. 1G FWD Dirt Oval Track Suspension Setup Help | DSMtuners to view PDF file of Circle Track Analyzer User Manual with Adobe Acrobat (tm). Always take tire temps; Tire temps are the only link you have to what is happening at the tire contact patch. The design also allows for increased pressure on the tires, which increases the traction as well. Its a 1/4 mile track with a slight bank on the turns. May 22, 2012 #1. scottr126 Proven Member. This tire was designed for use as a left rear for dirt sprint cars and has an approximate durometer reading of 38 at indoor , room temperature. Check your pressures using the same gauge. Steve Norris, crewman and tire prep for dirt late model driver Billy Moyer for over 20 years: “Siping makes a tire ‘fire’ quicker—get up to temperature faster. Post Tue Feb 18, 2014 10:43 pm. thisisatest . It goes in-depth covering the positives and negatives of doing so. You really only need enough air to keep the tread of the tire completely in contact with the track and the tire on the rim. This conformity causes friction, and friction is traction. True b.) Artrax MX-Pro. Some racers recommend airing your tires down by 5 pounds per square inch (psi) or so to introduce flex — this can help prevent wheelspin on launch — but personal preferences vary. And again we’re trying to let the tire be flexible and get a larger contact patch on the pavement. Why we chose the Geomax MX12 Dirt Bike tire for sand. Tire Pressures Tire pressure is one of the easiest adjustments to make to a car. The proverbial sack of potatoes in the boot helps, I'm sure. Most dirt track front suspensions need from 3 to 4 degrees negative camber in the right front tire and 1 1/2 to 2 1/2 degrees positive camber in the left front tire. After you have set the initial pressure by using the above outline, slowly keep reducing or increasing air pressure until there’s just a hint of tire spin. PAT GOSS: OK, Alright, now tire pressure for drag racing. Scale Hoosier Open … The same is true for dirt-track cars. ... steering wheel position and brake pressure. CHICAGO, Illinois. It has about 6 races on it and the last 2 weeks Ive blown the right front. Thread starter RCX; Start date Sep 5, 2018; RCX Senior Member. Front left has 22 psi, rear left and rear right have 20-40 psi depending how the track is and the front right has 25 psi. Basic Setup Tips for Beginners - iRacing Porsche 911 - Duration: 25:07. … 368 2. The second has to do with the fact that the front inside tire rotates more than the outside front tire, with an ideal rotation point that obviously varies according to front track width: the wider the track, the greater the radius of the ideal curve trajectory to follow. I have a 94 Pontiac Grand Am dirt track car. You can see the effect if you watch the top of your RF tire while your strongest crew member tries to roll the chassis by pushing sideways on the top of the roll cage. The best way to find the proper amount of stagger is when at the track; check your tires every time you return to the pit area. Pressure setups vary wildly from track to track, car to car, and different track conditions. What pressure should I run for track … This is a tire that is as good for trail riding as well as it is for your wallet. If you’re an average rider on an average bike riding on average terrain, set your tire pressure to 12psi and forget about the rest of this article. Dunlop’s DT4 tire is the Official Tire of American Flat Track. The most common tire pressure that avid dirt bike riders recommend is 12psi. The DT3 has long been the benchmark for professional and amateur flat track racing alike. Tire pressure rise will also vary from right to left, and front to rear. Kart racing is generally accepted as the most economic form of motorsport available on four wheels. RICK ROBINSON: You’re gonna run them pretty low, lower than most people would imagine. Tire pressure can also be a factor. Say there’s a D55 tire rule and the track is muddy for the heats. If it's worse, we change it back to the previous week's setup. Adjusting tire pressures is a good way to make smaller adjustments. More left hand corners and the right side tires will heat up more. I am racing a 1G FWD NT at my local clay oval track. Tires > Flat Track. 6:16 . Also, designed for use on a 14” to 15” wide wheel and has an approximate tread width of 12.5” to 13” | Measured section width is … A false indicator could be the use of excess Ackermann that forces the left front tire to scrub across the track and heat up. DT3 DT4 K180 View Tech Info. Casey pulled to the bottom of the track, with the car still running he drove it back to the pits to have it checked. Looking for some help with base line air pressure ive never fun a fwd on a 1/4 mile we run RF:34 RR:38 LF:25 LR:20 this is what i start with each time at a banked half mile and work from there. As well as having paddle-style knobs, and high air pressure capability; the MX12 also has self-cleaning grooves. If the middle of the tire is hotter, it means too much pressure. I’m not sure if 40 psig is sufficient to reduce the rear grip on a FWD car, I was assuming that it would. Tires $ 0.00. You can also check it against one or two other rider’s gauges to see if they give the same readings. You need to know what is happening, so always take tire temps, even after a race. FaRKle0079 292 views. Front wheel drive cars will heat up the front tires considerably more than rear wheel drives. The lower the tire pressure that you can use, the more a tire will conform to the surface of the concrete/pavement. a.) Tire pressure will rise about 5-10 psi when the tires heat up depending on the tire itself, track friction, and driver skill level. Racing. Read PDF Dirt Track Suspension Setup Manual that compairs the Circle Track Analyzer with our other … Less air increases the rolling resistance of the tire, often this can translate to an increase in traction. Tires: DT3 DT4 K180 View Tech Info. On my car, increasing the tire pressure in the RF by 3 psi results in a cross weight increase of approximately 0.2%. We have hundreds of sizes, constructions, and compounds that are sure to meet your needs as a dirt track racer, and are continually developing new products and compounds to excel in a highly competitive racing marketplace. The front tires are Power Star Kumho tires with tubes. Thread starter #1 I am sure there was a thread about running pressure a bit higher for tracking but I cannot find it. There are other ways to make large changes to the cross weight of my car. First Name Andy Joined Sep 3, 2017 Messages 66 Reaction score 14 Location Montreal Car(s) 2017 Type R | Sentra SER | GMC Terrain. An increased tire pressure may decrease rolling resistance, and may also result in shorter stopping distances If tire pressure is too low, the tire contact patch is greatly increased. Tire manufacturers such as Hoosier and Burris also make a slightly larger grooved tire only used in dirt track racing. If the middle is cooler, it means too little pressure. Generally, the tire pressure on a dirt bike should be between 6 and 18 psi with a traditional tire. will see less buildup of tire pressure as they heat up as nitrogen has less moisture than regular air. As far as preparing your vehicle on the day, remember to always check your tire pressure and inspect the sidewalls for damage. Sep 5, 2018. The only adjustments I make for changing track conditions is tire pressure.-----Gas right. Anticipating Tire GrowthPart of the art of tire stagger maintenance is being able to predict how much each tire will grow due to increases in pressure and temperature. Joined May 24, 2003. Top. We found the engine had 0psi oil pressure. The MX12 is in direct competition with Michelin’s Starcross 5 Sand. Author: Topic: FWD: tire pressure: rxmama Dirt Newbie Total posts: 2 posted August 11, 2002 07:51 PM Brake left. What tire pressure should I run? This use of Ackermann could produce more work and help the car to turn, but more often causes the front tires to fight one another to where both give up, resulting in a push. thisisatest 18 Joined: Sat Oct 16, 2010 10:59 pm. Front-wheel drive gets a bad rap with car enthusiasts. Tire pressure for track? More traction equals quicker 60-foot times. Recommended Air Pressures for World Short Track Championships With so many new race teams making their maiden voyage to the Dirt Track at Charlotte Motor Speedway for the World Short Track Championships, we thought it was important to provide some air pressure guidelines for this event. You’ll want a tread that’s all cut up so it can move around, build heat fast, and give you some bite. Just ask the tyre expert at the track to set your tyres to a given pressure using their compressor, then use your gauge to check it reads the pressure they just set it to. Scale Hoosier Compounds Competitor; SOFT: D10: SD23-RD12: SD30-D12: SD33-RD15: SD35-D15: SD38-RD20: SD40-D20: SD44-D25: SD48-KS1* MD50: FIRM: ASCS2*, POWRi* HD57 * Only available in the 69.0/10.0W-10 (Item #42239) Sprint Dirt Compound Comparison Chart. No bumping. It is difficult riding in sand. The Dunlop MX 12 is a dedicated sand tire. Tires; Local Dealer; FAQ; Log In. 2 . From $162. These tires also have awesome gap absorption as well as contact feel. Racing tire technology has grown exponentially over the past decade. The trend seems to be, the lower the better. Dunlop’s DT4 tire is the Official Tire of American Flat Track. From $162. Here are some tips. I am running 14 inch tires all the way around and tubed. 12. User manual is v2.0 manual + v3.2/v3.5/v3.6 supplements as Appendix 3, 4 and 5. to view the Suspension Analysis Programs Comparision Table Page 6/10. Apparently the oil pump chain didn't want to stay on the oil pump gear any longer. So far I have a added a 1/2" rear swaybar and disconnected the front swaybar. Hoosier Racing Tire Midget/Micro Dirt/ATV Flat Track Compound Cross Reference Chart. These two pictures illustrate the affect that tire pressure can have on the contact patch and sidewall height of a tire. Under-inflation can lead to tire overheating, premature tread wear, and tread separation in severe cases. 1G FWD Dirt Oval Track Suspension Setup Help Posted by scottr126, May 22, 2012. Keep good notes of the pressure and size gain. Re: Setting up suspension on a FWD car? This increases rolling resistance, tire flexing, and friction between the road and tire. You’ve heard about torque steer and “wrong-wheel drive” and might write it off as being for grocery-getters, not real performance cars. At some point, increasing the rear tire pressure will tend to increase the slip because the tire tread will be less able to conform to the road. Adjusting Tire Pressures at the Track - Duration: 6:16. The Team O’Neil Rally School also put together a video all about deflating tire pressure for off-road driving. Whether you race in open competition classes, or race under a spec tire rule, we have a tire that will cover the field. This is important for trail riding because it helps the dirt biker a lot with cornering and avoiding obstacles.