05-19-2023, 12:40 PM | #1 |
Drives: Nickey Super Camaro Join Date: Nov 2008
Location: Loves Park, Illinois
Posts: 1,668
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Drag Radial Tire Pressure info by M/T Mickey Thompson
TECH BULLETINS
ET STREET R (BIAS), ET STREET R, ET STREET S/S, PRO DRAG RADIAL, PRO BRACKET RADIAL AND ET DRAG AIR PRESSURE GUIDELINES Updated 8/15/17 PROPER AIR PRESSURE Proper air pressure is critical to the best performance of your ET Drag or ET Street racing tires. Mickey Thompson strongly suggests investing in a good tire pressure gauge and that you keep accurate and complete records of each pass. This will aid you in becoming a consistent performer. Recommending air pressure is not easy, since there are so many variables that affect it: i.e. weight distribution, transmission, chassis set-up, wheel size, etc. To help you, we have broken down the types of vehicles into the following categories with a recommended starting point for the correct air pressure. These pressures are for off-highway use only and based on optimum chassis and drivetrain setups. Keep in mind that these are purely starting points. Actual optimum air pressure may vary significantly. If you have been running another brand of slick on your racecar, we generally recommend you start with the same air pressure you were running and go up in ½ pound increments until you get the best performance. Most racers will usually end up with ½ to 2 pound more air pressure in a Mickey Thompson tire. Note: Many racers feel that “Less is Better” with regard to air pressure. This is not always the case. While there are exceptions to every rule, we have found higher pressure generally works best with Mickey Thompson Tires. Not only do the higher pressures lead to quicker times, but they also contribute to a safer, more stable ride at the finish line. ET DRAG® AND ET STREET™ R (BIAS) VEHICLE WEIGHT TIRE SIZE AIR PRESSURE UNDER 2,500 LBS UNDER 32" DIA 7 P.S.I. AND UP UNDER 2,500 LBS OVER 32" DIA 5 P.S.I. AND UP 2,500 TO 3,000 LBS UNDER 30" DIA 10 P.S.I. AND UP 2,500 TO 3,000 LBS 30-33" DIA 8 P.S.I. AND UP 2,500 TO 3,000 LBS OVER 33" DIA 5.5 P.S.I. AND UP OVER 3,000 LBS UNDER 30" DIA 12 P.S.I. AND UP OVER 3,000 LBS 30-33" DIA 8 P.S.I. AND UP OVER 3,000 LBS OVER 33" DIA 6 P.S.I. AND UP ET DRAG PRO DRAG RADIAL AND PRO BRACKET RADIAL VEHICLE WEIGHT TIRE SIZE AIR PRESSURE 2,500 TO 3,000 LBS UNDER 30" DIA 16 P.S.I. AND UP 2,500 TO 3,000 LBS OVER 30" DIA 8 P.S.I. AND UP OVER 3,000 LBS UNDER 30" DIA 16 P.S.I. AND UP OVER 3,000 LBS OVER 30" DIA 12 P.S.I. AND UP ° When working with ET Drag Radials use 1 psi adjustments to see change. ° A radial will perform quicker the more air you can run. ET DRAG MOTORCYCLE Quarter Mile: in 8 to 9 seconds, 15 – 19 psi Quarter Mile: High 9 seconds and slower, high twenties to mid thirties 3210 ET Front: 35-40 psi 3053M, 3158M (Pro Stock – Pro Mod): 4.0 – 6.0 psi, wheelie bar 2” – 2 1/8” 3064M: 4.0 – 6.0 psi, Wheelie bar 2” – 2 1/8” 3065M: 6.0 – 9.0 psi, Wheelie bar 1 ¾” 3073M: 7.0 – 8.0 psi, Wheelie bar 1 ¾” 3220: 7.5 – 10 psi, Wheelie bar 2” – 2 1/8” 3221, 3222: 6.5 – 8.0 psi, Wheelie bar 2” – 2 1/8” These recommended pressures are guidelines only, actual pressures may vary. Wheelie bar settings are with the front end extended and can vary as well. ET STREET™ R (RADIAL) AND ET STREET™ S/S On the racetrack DO NOT use starting pressures below 13 psi. Recommend pressures: 14-18 psi For suggested highway use inflation pressure in Mickey Thompson ET Street Radial tires, contact the Mickey Thompson Tires tech department at (800) 222-9092 (Option 5). Please have your OE specified tire size and OE cold inflation pressure (located on the vehicle’s tire placard), as well as the new tire size available for the tech staff. ET DRAG JR. 3625: 4 – 8 psi 3645: 4 – 8 psi The technical information provided in this document is to be used purely a guideline. Due to the many varied and different conditions to which racing tires, wheels and tubes are exposed, and because of the manner in which racing is conducted, Mickey Thompson Performance Tire makes absolutely no warranty, expressed or implied, as to the fitment for a general or particular purpose. Racing Tires are Sold As Is. |
05-19-2023, 02:14 PM | #2 |
Account Suspended
Drives: Chevy Camaro ZL1 Join Date: Feb 2023
Location: Floriduh
Posts: 121
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You only run them as low as you need to be able to hook. Thats it. No need to run down lower than 20 in most cases unless you arent hooking. I run my ET Street Rs at 24 then maintain that down as they heat up.
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